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Gas Stop/Ratio Valve

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1. 1 3 2 1 1 1 V Qe Ne gt 1 440 36 58 9 Woodward Figure 1 6a Gas Stop Ratio Valve Outline Drawing 4 inch FRONT VIEW 11 4 IN CLASS 300 RF FLANGE 4 IN 144 76 3 126 83 4 U J 11 386 10 762 Le 5852 273 35 Em HYDRAULIC RETURN 1312 12 UN 2B THREAD STRAIGHT THREAD PORT 16 i 1 s 3 f ouf 7 1 1 _ z
2. BLACK RED RED RED BLACK BLACK PRIMARY PRIMARY PRIMARY D N j Pe WY LX dw SE AL INSERT EXTEND INSERT TEND INSERT 4 1 EXTEND le e l RANGE BLUE RANGE BLUE RANG BLUE CASA 999 999 999 gt 4 VV VV RED HITE YELLO GREEN ORANG BLUE M 3 14 15 1617 18 I y tJ Um c t 06 WITH POLARITIES SHOWN CYLINDER 2 2 XTENDS AND PROCESS VALVE OPENS x eo 3 2 2 2 gt 212 212 2 1 1 01 01 gt e zi iz 6 eo 1 2 31415 6 7 8 9 0 1 12 04 10
3. 19 BLACK RED V RED BLACK PRIMARY PRIMAR DAE III IK IO INSERT EXTEND INSERT L EXTEND 70947 U UU VS N MV M e Y Y Y Y Y Y Y Yg 4 M gt k J 1 RANGE BLUE RANGE BLUE al E RED WHITE YELLOW GREEN ORANGE BLUE k s IREEN 2113 D IREEN P Y O y e Ed WITH PULARITIES SHOWN CYLINDER EXTENDS AND PROCESS VALVE OPENS re n 1 gt gt gt gt I I m 0 06 CO D C CO pg lt AJ gt 00 20 I 02 zs Figure 1 3a Electrical Schematic and Wiring Diagram Dual LVDT GREEN GREEN GREEN
4. LS FILTER 1 Iw HH 2501 63 5 FILTER CARTRIDGES FILTER ASSEMBLY REMOVAI CLEARANCE 33287 845 49 32 957 837 INCH MM OQ di J 4 2 154 7 CG CENTER OF GRAVITY 74 1 x N y N lt N a NUT BE USED FUR INSPECTIUN REFERENCE DIMENSIONS ONLY Figure 1 10b Gas Stop Ratio Valve Outline Drawing 8 inch with 2 LVDTs Woodward 20 26620 Gas Stop Ratio Valve WIRES FROM SERVED CLVDT GROUND WIRES ELECTRICAL ENCLOSURE EW 8 IN CLASS 300 RF FLANGE 1 f WIRES FROM LVDT 7 bct IN
5. N N Xe X X 2 PF ut o 1 10 037 1 1 N 1854 25 C H 1 VALVE ACCESS COVER NS X Ba d N L 2 S N TN N TRIS gt Ew 3 9N N N x 458 e I 1564 02 9 712 Y N 246 68 430 oN 15 30 391 92 FRONT VIEW Figure 1 10 Gas Stop Ratio Valve Outline Drawing 8 inch with 2 LVDTs Woodward 19 Manual 26620 Gas Stop Ratio Valve 2 X LIFTING TES Z PRESSURE 1062 12 UN 2B THREAD STRAIGHT THREAD PORT 12 4 788 B 2164 2 HYDRAULIC SUPPLY _ 1790 16 UNF 2B THREAD STRAIGHT THREAD PORT 08 2 7 2 D i 27 ii D 13 75 19720 33782
6. 1 4 690 119 13 63 53 9 580 243 33 M NI VIEW C C SHOWN WITHOUT COVER SEE WIRINC DIAGRAM 17 905 454 78 12 34 5 24 314 05 1407 J I HYDRAULIC RETURN 1312 12 UN 2B THREAD STRAIGHT THREAD PORT 5 16 S i N POSITION INDI
7. POSITION INDICATUR Lan 1250 115 NPT CONDUIT THREAD WIRING ACCESS TO JUNCTION BOX 2 O Ls A 40000 yay 1016 00 ACCESS CD FOR BLOCKS WARNING DO NOT REMOVE THESE NUTS 25 PLATE IS SPRING LOADED TERR 2000 LBS SEE INSTRUCTIONS TR BEFORE REMOVING PL 1 M i um E I EN JN H N N VALVE ACCESS COVER ne N N 3658 20 fo LAX 4125 104 78 VIEW FRON Figure 1 5a Gas Stop Ratio Valve Outline Drawing 3 inch Woodward Gas Stop Ratio Valve Manu
8. WIRES FROM SERVD 7 M6 GROUND THREAD 1627 671 ELECTRICAL ENCLOSURE F lt CWIRES FROM LVDT 1 4 T T N 3 IN CLASS 300 FLANGE 27 00 M6 GROUND THREAD lt o St 1 gt C 5 LEE E EEk SERVOY L V 6 563 37 166 7 1635 GROUND THREAD 6 GROUND THREAD i 5 10 AWG MAX TERMINAL BLOCKS AA ATA SHOWN WITHOUT COVER SEE WIRING DIAGRAM DUT 2 16 888 sy 11759 428 55 Ez 10 347 ET H 298 67 262 81 w a 2 Jy CNN HYDRAULIC RETURN 6 1 1 STRAIGHT THREAD PORT 5 16 27 RETURN M 5 P IF 710 N
9. C C SHOWN WITHOUT H COVER SEE WIRING DIAGRAM OUT E HYDRAULIC RETURN WS 12441 1312 12 UN STRAIGHT THREAD PORT 162 n 315 99 i i PER WOODWARD GOVERNOR COMPANY 3 09 0296 pue MS 16142 EXCEPT MNDR DIAMETER H Y ACCEPT J THREADS TR SEE ENLARGED
10. 2 ENLARGED VIEW HOWN WITHOU COVER SEE WIRING DIAGRAM e Ht S J lt T Pd XZ A U 181254 460 38 5 15 750 12 364 5 541 314 05 GE 1407 314 05 140 73 Lu 2 300 04 I HYDRAULIC RETURN _ 1319 19 UN 8B THREAD p STRAIGHT THREAD PORT 16 Ae NS E T1 1 211 7 7 ES 29 0 a p 227 4 POSITION INDICATOR P d 1250 11 5 NPT CONDUIT THREAD
11. 2 NOT BE USED FOR INSPECTION Figure 1 11b Gas Stop Ratio Valve Outline Drawing 8 inch with 3 LVDTs 22 Woodward 26620 Gas Stop Ratio Valve Chapter 2 Stop Ratio Valve Operation The Gas Stop Ratio Valve actuator is controlled by an electronic servo control system not included which compares the demanded and actual valve positions The control system modulates the input current signal to the electrohydraulic servo valve to minimize the positioning system error See Figure 1 2 for a functional schematic of the single acting actuator Hydraulic oil enters the actuator via a removable element filter with integral high AP indicator and is directed to a four way electrohydraulic servo valve used three way configuration The PC1 control pressure output from the servo valve is directed to the top of the hydraulic piston When the force exerted by the hydraulic pressure exceeds the force of the opposing loading springs the output piston extends rotating the valve in the opening direction A trip relay valve assembly is interposed between the electrohydraulic servo control valve and the servo output stage Loss or reduction of the externally supplied trip signal pressure causes the trip relay valve to shift position This connects the upper cavity of the actuator piston to the hydraulic drain The force sup
12. GRAVITY CENTER 260 085 9989 1065 06 1 18 55 260 Figure 1 9b Gas Stop Ratio Valve Outline Drawing 6 inch with 3 LVDTs Woodward 18 26620 Gas Stop Ratio Valve VIRES FROM SERVID 1 1627 671 ELECTRICAL ENCLOSURE 2 X Y VI M6 GROUND THREAD 8 IN CLASS 300 RF FLANGE 4 M6 GROUND THREAD n 7 906 200 81 Le H 9 8 a 1 gt GROUND THREAD 1 M6 GROUND THREAD 10 AWG MAX TERMINAL BLOCKS m 2070 ENLARGED VIEW
13. M6 GROUND THREAD M6 GROUND THREAD 9 M6 GROUND THREAD N M6 GROUND THREAD 10 AWG MAX TERMINAL BLOCKS SHOWN WITHOUT COVER SEE WIRING DIAGRAM 16 888 MAX 428 95 WIRES FROM LVDT See ii 2 EN 1 i 1 1250 1115 NPT CONDUIT THREAD WIRING ACCESS TO JUNCTION BOX D
14. Product Manual 26620 Revision D 10 2013 Original Instructions Gas Stop Ratio Valve This manual is based on manual 26093 revision R Installation and Operation Manual Read this entire manual and all other publications pertaining to work to performed before installing operating or servicing this equipment Practice all plant and safety instructions and precautions General Precautions Failure to follow instructions can cause personal injury and or property damage This publication may have been revised or updated since this copy was produced A To verify that you have the latest revision check manual 26371 Revision Status amp Distribution Restrictions of Woodward Technical Publications on the publications Revisions page of the Woodward website www woodward com publications The latest version of most publications is available on the publications page your publication is not there please contact your customer service representative to get the latest copy mechanical electrical or other operating limits may cause personal injury and or property damage including damage to the equipment Any such unauthorized Proper Use modifications i constitute misuse and or negligence within the meaning of the product warranty thereby excluding warranty coverage for any resulting damage and ii invalidate product certifications or listings Any unauthorized modifications to or use of
15. 6 250 AN 1 11 1 EB VALVE ACCESS COVER 12 750 j 323 84 FRONT VIEW Figure 1 7 Gas Stop Ratio Valve Outline Drawing 6 inch except 55 260 Woodward 13 Manual 26620 Gas Stop Ratio Valve 4 013 Jt 242 Yes 4 2 X LIFTING EYES 95 58 13318 P d p di i Jem Z TRIP PRESSURE a 1062 12 UN 2B THREAD d STRAIGHT THREAD PORT 185 ON 22 NL 4 L4 HYDRAULIC SUPPLY qq 750 16 UNF 2B THREAD i STRAIGHT THREAD PORT 08 l 1 1 770 76 76147 FILTER KE n amp ME 7 _ lt 2 900 63 5 FILTER CARTRIDGE FILTER ASSEMBLY CLEARANCE US LU U
16. 260 08 VIEW Figure 1 8a Gas Stop Ratio Valve Outline Drawing 6 inch SS 260 Woodward 15 Gas Stop Ratio Valve Manual 26620 2 2 X LIFTING EYES Pd IA ANA d RI ESSURE 19 004 Er 1062 12 UN 2B THREAD 2541 STRAIGHT THREAD PORT 18 gt 6 147 gt 2 EDT 156 14 HYDRAULIC SUPPLY 750 16 UNF 2B THREAD 4 398 PA 2 STRAIGHT THREAD PORT 08 Vat 1111 71 2 SUPPL 7 n 13750 max 33 287 1845 49 32 957 837 11 1 gt CARTRIDGES FIL ER ASSEMBLY RE CLEARANCE 23 AN 7 25 KL 4 Le
17. 41 REVISION HISTORY 42 5 22555 5 455554 55255 43 Woodward Gas Stop Ratio Valve Manual 26620 Illustrations and Tables Figure 1 1 Gas Stop Ratio Valve typical 3 inch shown 3 Figure 1 2 Single Acting Hydraulic Schematlic 4 Figure 1 3a Electrical Schematic and Wiring Diagram Dual LVDT 5 Figure 1 3b Electrical Schematic and Wiring Diagram Triple LVDT 6 and 8 V ves OO 5 Figure 1 4 Barrier Wiring Diagram TIIS requirement Japan 6 Figure 1 46 Servo Valve Barrier Wiring Diagram TIIS requirement Japan 7 Figure 1 5a Gas Stop Ratio Valve Outline Drawing 3 inch 9 Figure 1 56 Gas Stop Ratio Valve Outline Drawing 3 inch 10 Figure 1 6a Gas Stop Ratio Valve Outline Drawing 4 inch 11 Figure 1 6b Gas Stop Ratio Valve Outline Drawing 4 inch 12 Figure 1 7a Gas Stop Ratio Valve Outline Drawing 6 inch except 55 260 13 Figure 1 7b Gas Stop Ratio Valve Outline Drawing 6 inch except SS 260 14 Figure 1 8a Gas Stop Ratio Valve Outline Drawing 6 inch SS 260 15 Figure 1 8b Gas Stop R
18. SHOWN WITHOUT SEE WIRING DIAGRAM UT HYD RETURN I CLUSED 2 5 ood m 260 072 00 11 29 Figure 1 1 Gas Stop Ratio Valve typical 3 inch shown Woodward 3 Gas Stop Ratio Valve Manual 26620 UEL IN UEL HU PPACKING VENT UNNE TIUN 6 N 2 7 pe 2 5 N T D lt x E 2 PTIUNAL THIRD 2251230 b 5 C 5 24 2 Ne N f LVD N GS b Sle AE 4 1 x 2 M VALVE ONLY 5116 3 01 11 2 2 2 b X JRAIN P P M lt 2 A 7 gt 260 063 01 10 4 Figure 1 2 Single Acting Hydraulic Schematic 4 Woodward 26620 Gas Stop Ratio Valve
19. S WIRINC ESS JUNCTION BOX 4 p ACCESS Esc cd FOR RIGGING BLOCKS 2006 3 685 ssl 192 08 DR BODILY INJURY WILL RESULT 21392 IF THESE NUTS ARE REMOVED Sc 1557 45 7 UM AS 25 lt S Pp lt 10 037 p 10 027 1 7 4 7 254 93 Fl _ E s bs 74 X x NDA IN E VALVE ACCESS COVER RR gt SR le J Z LIN Eu i PUN ER EN V 22 N 2 N 1 e N N 6 440 7190 1 16 458 a 8751 3 1163 58 182 63 164 02 7 62 bw
20. 26620 Gas Stop Ratio Valve VIRES FROM SERVD 70 LL GROUND THREAD 1627 671 ELECTRICAL ENCLOSURE TOP VIEW 6 IN CLASS 300 RF FLANGE i 51 154 96 lt WIRES FROM LVDT _ F 6 GROUND THREAD A I u f I9 we GROUND THREAD M6 GROUND THREAD 7 d X I _ II 10 AWG MAX TERMINAL BLOCKS i W SHOWN WITHOUT COVER SEE WIRING DIAGRAM QUT HYDRAULIC RETURN
21. Controller Scaling Figure 4 1 Stop Ratio Valve Block Diagram Woodward 29 Gas Stop Ratio Valve Manual 26620 Ksv nominal 3 0 in sec mA at 1600 psi supply small actuator 6 0 in sec mA at 1600 psi supply large actuator Ksv is proportional to square root of supply and constant with position ZetaSV 0 7 WnSV 680 rad sec 108 Hz WnSV is proportional to square root of supply Ac 2 4 in small actuator 4 9 in large actuator KL 0 80 Vrms inch Servo Travel 3 5 inches TauL 0 005 seconds depends on excitation demodulation See page 2 for usage of small and large actuators Structures for PID Control Integrator Limit 20 Integrator Limit t 20 Integral Gain Integral Gain Kd Proportional D gain Gain Error Error Proportional Gain Derivative Derivative Gain Figure 4 2 Structures for PID Control Proportional Control Proportional Proportional Integral Gain Settings Control Integral Derivative Kp 5 Kp 3 Ki 5 Kp 3 Ki 5 Kd 0 01 or Tau Lead 0 01 Table 3 1 Recommended Control Gain Values for Different Control Types Null Current Adjustment Every valve shipped contains documentation that gives the actual Null Current as measured by Woodward It is imperative that the control system null current match the as measured current for each valve in the system Incorrect null current setting with pr
22. L P ES 0c 92 10 RAVITY IX CG CENTE 2 Figure 1 8b Gas Stop Ratio Valve Outline Drawing 6 55 260 16 Woodward 26620 Gas Stop Ratio Valve I WIRES FROM SERVED GROUND WIRES ELECTRICAL ENCLOSURE 2 WIRES FROM LVDT CENTERLINE OF CONDUIT Lp CONNECTION IN CEXTERNAL 05 K 2 GROUND SCREWS K 10 AWG MAX TERMINAL BLOCKS IN cb ve ay MD en g 99
23. 17 Gas Stop Ratio Valve Manual 26620 RIP DIE SUPPLY 062 12 UN STRAIGHT THREAD PURI PER WOODWARD GOVERNOR COMPANY 3 09 0296 MS 16142 EXCEPT MINOR DIAMETER 1 ACCEPT J THREADS EAD PORT 08 MPANY 3 09 0296 R 1 LIC SUPPLY UNF STRAIGHT THR HYDRAU 5 7 DWARD GOVERNOR NDR DIAME Z aN 2 X LIFTING EYES SON 6 147 MM R W J MS 16142 EXCEPT MIN ACCEPT J THREADS i H 13 750 A P s 337 82 7 ee 2 f L FILTER p E T J Ca 2 500 MIN 2 36 099 FILTER CARTRIDGE TES REMOVAL CLEARANCE zx 33 287 845 49 MM A AN SZ
24. 7 POSITION INDICATOR n CLOSED gt ue LE ACCESS COVER FOR BLOCKS 2 734 _ 69 44 e WARNING DO NOT REMOVE THESE NUTS 2 PLATE IS SPRING LOADED TO 2000 LBS SEE INSTRUCTIONS BEFORE REMOVING x 1 VALVE ACCESS COVER 5 M N 9N 22 6 310 160 27 L 5 031 214 jel 4 969 Gas Stop Ratio Valve Manual 26620 9 259 8 109 235 ols 6 411 205 97 2 X LIFTING EYES 54 12 ibc o 77 8 13318 TAs L TRIP PRESSURE 1062 12 UN 2B THREAD STRAIGHT THREAD PORT 12 HYDRAULIC SUPPLY 150 16 UNF 8B THREAD STRAIGHT THREAD PORT 08 CT 4 14 000 22 560 0 FILTER AL WEA V E FILTER ASSEMBLY REMDVAI CG CENTER DF GRAVITY Figure 1 6b Gas Stop Ratio Valve Outline Drawing 4 inch 12 Woodward
25. leakage deteriorated Piping flanges improperly piping needed to achieve alignment requirements detailed in Chapter 4 Piping flange bolts Rework bolts as needed to achieve torqued torque requirements detailed in Chapter 4 adjustment 5290 Type deteriorated Form 5290 Internal gas fuel Vee Ball seal missing or Service seal per Fisher manual Form leakage deteriorated 5290 Type Vee Ball and Fisher Errata Sheet 55 260 36 Woodward 26620 Gas Stop Ratio Valve Possible Causes Servo valve command current incorrect The sum of the current through the three coils of the servo Valve will not open Valve will not close Valve will not respond smoothly Actuator seals wear out prematurely valve must be greater than the null bias of the servo valve i the gas valve to open Trace and verify that all wiring is in accordance with the electrical schematic Figures 1 3a 1 3b or 1 4b and the GE system wiring schematic s Pay special attention to the polarity of the wiring to the servo valve and LVDT Servo valve failure Replace servo valve Hydraulic supply pressure inadequate Trip relay pressure inadequate Supply pressure must be greater than 1200 psig 8274 kPa 1600 psig 11 032 kPa preferred Trip pressure must be greater than 40 psig 276 kPa Vee Ba
26. upon the product and application This service can assist you with technical questions or problem solving during the normal business hours of the Woodward location you contact Emergency assistance is also available during non business hours by phoning Woodward and stating the urgency of your problem Product Training is available as standard classes at many of our worldwide locations We also offer customized classes which can be tailored to your needs and can be held at one of our locations or at your site This training conducted by experienced personnel will assure that you will be able to maintain system reliability and availability Field Service engineering on site support is available depending on the product and location from many of our worldwide locations or from one of our Full Service Distributors The field engineers are experienced both on Woodward products as well as on much of the non Woodward equipment with which our products interface For information on these services please contact us via telephone email us or use our website www woodward com 40 Woodward 26620 Gas Stop Ratio Valve How to Contact Woodward For assistance call one of the following Woodward facilities to obtain the address and phone number of the facility nearest your location where you will be able to get information and service Electrical Power Systems Engine Systems Turbine Systems Facility Phone Number Fac
27. 1219 19 UN 2B THREAD STRAIGHT THREAD PORT 162 SERIAL 4 gt sue STROKE MD 2 POSITION INDICATOR 6 CLOSED INCH 1850 115 CONDUIT THREAD WIRING ACCESS TO JUNCTION BOX 71 x FOR BLOCKS p d 4 41 PIE 93 ACCESS COVER peer aai 28 100 WARNING 11034 2 23 snag DRY CG DO REMOVE THESE NUTS 2 PLATE IS SPRING LOADED 2000 LBS SEE INSTRUCTIONS BEFORE REMOVING
28. C Hydraulic fluid temperature 80 to 170 F 27 to 77 C 7 Servo Valve Flow rating Small Actuator 5 0 US gal min 18 9 L min at 1000 psid 6895 kPa valve drop 4 way Large Actuator 10 0 US gal min 37 8 L min at 1000 psid 6895 kPa valve drop 4 way Electrical input rating 8 mA sum of three coils Null bias 10 of rated flow to close stop ratio valve 10 4 rated current at hydraulic null Electrical connection 0 375 O D tube fitting 0 562 18 UNF 2A thread per MS 33656 6 Small actuator used on 3 4 and 6 valves with HD Metal or TCM Ultra seals Large actuator used on 6 valves with SS 260 seals as well as on 8 valves with HD Metal or TCM Ultra seals These general reference outline drawings apply to various IM OR TAN T Woodward Gas Fuel Stop Ratio valves Consult Woodward for the latest outline drawing for your particular stop ratio valve 8 Woodward 26620 Gas Stop Ratio Valve VIEW
29. capable of measuring 4 inches 100 mm of stroke to the stop ratio actuator body Position the indicator plunger tip on the measurement bar as shown in Figure 5 1 8 Apply hydraulic pressure to the stop ratio actuator and manually command the actuator to stroke 3 500 0 005 inches 88 90 0 13 mm by manipulating the electronic controller 9 Note and record the LVDT output voltages at this 3 5 inch stroke position 10 Remove the actuator control command returning the actuator to its rest gas valve closed position 11 Shut off the stop ratio actuator hydraulic supply 12 Update the stop ratio control logic with the new LVDT output voltage value 13 Remove the cover on the stop ratio actuator electrical junction box 14 Replace the original max output voltage value on the label in the stop ratio actuator electrical junction box with the newly measured value 15 Replace the cover on the junction box and tighten the screws 16 Remove the dial indicator and measurement bar Figure 5 1 Stroke Measurement Attachment Bar 17 Reinstall the access cover with four 10 32 UNF screws adjusting the closed indicator mark to align with the position indicator screw slot Tighten the four cover attaching screws to 30 40 Ib in 3 4 4 5 Woodward 35 Gas Stop Ratio Valve Manual 26620 Troubleshooting Charts Faults in the fuel control or governing system are often associated with speed variations of the prime m
30. etc Rating Application Control Governor 1 Woodward Part Number amp Rev Letter Control Description or Governor Type Serial Number Control Governor 2 Woodward Part Number amp Rev Letter Control Description or Governor Type Serial Number Control Governor 3 Woodward Part Number amp Rev Letter Control Description or Governor Type Serial Number If you have an electronic or programmable control please have the adjustment setting positions or the menu settings written down and with you at the time of the call Woodward 41 Gas Stop Ratio Valve Manual 26620 Revision History Changes in Revision D e Updated ATEX information page e Updated Declaration Changes in Revision C e Added warnings required by ATEX changes pages vi 28 31 Updated Declaration Changes in Revision B e Updated Pressure Equipment Directive and GOST information e Updated Declaration of Conformity Changes in Revision A e Corrected filter torque page 32 42 Woodward 26620 Gas Stop Ratio Valve Declarations 44447 _DECLARATION OF CONFORMITY Manufacturer s Name WOODWARD INC WWD Manufacturer s Address 1000 E Drake Rd Fort Collins CO USA 80525 Model Name s Gas Stop Ratio Valve consisting of an electrohydraulic actuator and gas valve Conformance to Directive s 94 9 Council Directive of 23 March 1994 on the approximation of the laws of the Member States co
31. not connect or disconnect while circuit is live unless area is Known to be non hazardous Due to the hazardous location listings associated with this valve proper wire type and wiring practices are critical to operation Protective earth PE ground must be connected on the junction box per the installation drawing to reduce the risk of electrostatic discharge in an explosive atmosphere Do not connect any cable grounds to instrument ground control N O TI CE ground or any non earth ground system Make all required electrical connections based on the wiring diagram Figures 1 3 amp 1 4 The use of cable with individually shielded twisted pairs is recommended All signal lines should be shielded to prevent picking up stray signals from nearby equipment Installations with severe electromagnetic interference EMI may require shielded cable run in conduit double shielded wire or other precautions Connect the shields at the control system side or as indicated by the control system wiring practices but never at both ends of the shield such that a ground loop is created Wires exposed beyond the shield must be less than 2 inches 51 The wiring should provide signal attenuation to greater than 60 dB 28 Woodward 26620 Gas Stop Ratio Valve Servo Valve Electrical Connection Servo valve cable must consist of three individually shielded twisted pairs Each pair should be connected to one coil of the se
32. number s description of the problem instructions describing the desired type of repair Woodward 39 Gas Stop Ratio Valve Manual 26620 Packing a Control Use the following materials when returning a complete control e protective caps any connectors e antistatic protective bags on all electronic modules e packing materials that will not damage the surface of the unit e atleast 100 mm 4 inches of tightly packed industry approved packing material a packing carton with double walls a strong tape around the outside of the carton for increased strength To prevent damage to electronic components caused by improper N O Tl CE handling read and observe the precautions in Woodward manual 82715 Guide for Handling and Protection of Electronic Controls Printed Circuit Boards and Modules Replacement Parts When ordering replacement parts for controls include the following information the part number s XXXX XXXX that is on the enclosure nameplate the unit serial number which is also on the nameplate Engineering Services Woodward offers various Engineering Services for our products For these services you can contact us by telephone by email or through the Woodward website e Technical Support e Product Training e Field Service Technical Support is available from your equipment system supplier your local Full Service Distributor or from many of Woodward s worldwide locations depending
33. only Orientation vertical approximately as shown See elsewhere in this manual for other installation recommendations 3 Approximate Weight 3 Valve 255 165 116 kg 4 Valve 280 165 127 kg 6 Valve except SS 260 332 165 151 kg 6 Valve SS 260 447 165 203 kg 8 Valve 540 Ibs 245 kg 4 Service Manual Replacement Parts Servo Valve consult Woodward for part number O rings for servo valve consult Woodward for part number Filter element consult Woodward for part number Manual consult Woodward for part number LVDT consult Woodward for part number Trip relay valve consult Woodward for part number Seal kit for trip relay valve consult Woodward for part number 5 Description of Stop Ratio Valve Process fluid natural gas Temperature range natural gas 50 to 300 F 10 to 149 C unheated fuel natural gas 50 to 450 F 10 to 232 heated fuel ambient 20 to 180 29 to 82 C External leakage 2 cm min maximum to overboard drain 6 Actuation Cylinder bore Small Actuator 1 750 inch diameter 44 45 mm Large Actuator 2 500 inch diameter 63 50 mm Stroke 3 500 inch 88 90 mm Static seals Elastomer US MIL R 83248 Viton Operating fluid Petroleum based hydraulic fluid as well as fire resistant hydraulic fluids such as Fyrquel EHC Rated hydraulic pressure 1600 psig 11 032 kPa Operating hydraulic pressure 1200 to 1700 psig 8274 to 11 722 kPa Ambient temperature 20 to 180 F 29 to 82
34. or Packager Please review your equipment system documentation for details Woodward Business Partner Support Woodward works with and supports a global network of independent business partners whose mission is to serve the users Of Woodward controls as described here A Full Service Distributor has the primary responsibility for sales service system integration solutions technical desk support and aftermarket marketing of standard Woodward products within a specific geographic area and market segment e Authorized Independent Service Facility AISF provides authorized service that includes repairs repair parts and warranty service on Woodward s behalf Service not new unit sales is an AISF s primary mission Recognized Engine Retrofitter RER is an independent company that does retrofits and upgrades on reciprocating gas engines and dual fuel conversions and can provide the full line of Woodward systems and components for the retrofits and overhauls emission compliance upgrades long term service contracts emergency repairs etc Recognized Turbine Retrofitter is an independent company that does both steam and gas turbine control retrofits and upgrades globally and can provide the full line of Woodward systems and components for the retrofits and overhauls long term service contracts emergency repairs etc You can locate your nearest Woodward distributor AISF RER or RTR on our website at
35. screws holding the servo valve to the manifold 6 Discard the eight O rings between the servo valve the adapter plate and the manifold 7 Obtain replacement servo valve and verify part number and revision with existing unit 8 Place four new O rings on the adapter plate 9 Reposition adapter plate onto hydraulic manifold ensuring hydraulic passages and bolt holes are aligned correctly Be sure that all four O rings remain in their proper location during assembly on the lower side of the adaptor plate facing the manifold 10 Remove protective plate from replacement servo valve and verify that O rings are on all four counter bores of the servo valve 11 Place the servo valve onto the adapter plate that has been positioned on the hydraulic manifold Be sure to orient the servo valve to match the original orientation Be sure that all four O rings remain in their proper location during assembly 12 Install four 10 32 UNF socket head cap screws and torque to 32 35 Ib in 3 6 4 0 N m 13 Install the servo valve wiring through conduit and into electrical box 14 Connect conduit to servo valve and torque to 450 550 Ib in 51 62 N m 15 Torque conduit to electrical box to 450 550 Ib in 51 62 16 Install wires into servo valve connector blocks as shown in the wiring diagram Figure 1 3a or 1 3b If it is necessary to cut wires for installation be sure to retain at least one service loop of wiring 17 Replace cover onto ju
36. www woodward com directory 38 Woodward 26620 Gas Stop Ratio Valve Woodward Factory Servicing Options The following factory options for servicing Woodward products are available through your local Full Service Distributor or the OEM or Packager of the equipment system based on the standard Woodward Product and Service Warranty 5 01 1205 that is in effect at the time the product is originally shipped from Woodward or a service is performed e gt Replacement Exchange 24 hour service e Flat Rate Repair e Flat Rate Remanufacture Replacement Exchange Replacement Exchange is a premium program designed for the user who is in need of immediate service It allows you to request and receive a like new replacement unit in minimum time usually within 24 hours of the request providing a suitable unit is available at the time of the request thereby minimizing costly downtime This is a flat rate program and includes the full standard Woodward product warranty Woodward Product and Service Warranty 5 01 1205 This option allows you to call your Full Service Distributor in the event of an unexpected outage or in advance of a scheduled outage to request a replacement control unit If the unit is available at the time of the call it can usually be shipped out within 24 hours You replace your field control unit with the like new replacement and return the field unit to the Full Service Distributor Charges for the Replacemen
37. 1 Gas Stop Ratio Valve Manual 26620 P 2 X LIFTING EYE 2 2 PRESSURE 10 004 4 2B THREAD T 2 1062 12 UNE 122414 STRAIGHT THREAD PORT 12 4 788 4 121 61 HYDRAULIC SUPPLY 750 16 UNF 2B THREAD STRAIGHT THREAD PORT 08 pio 113 750 MAX 1 9 4 m 1337 82 Jy ibo FILTER Ne m ULL Dix FILTER ASSEMBLY CLEARANCE 33287 845 49 32 95 7 837 11 bo INCH MM LA LAN C 2 WD LLL A d J FTN __ __ CG CENTER OF GRAVITY 24 SN Z WY 2 S MEM J coe Ue 7G LR Jj 04 10 4 N QD p
38. 6 1090811 OR LVDT Certified for Class Division 2 Groups B D T3 per ETL J98036083 003 For use in United States and Canada Servo Valve Certified for Class Division 2 Groups A B C D for the United States per FM 4B9A6 AX CSA Certified for Class Division 2 Groups A B C D for use in Canada per CSA 1072373 Junction Box UL Certified for Class Zone 1 AEx e Il Ex e Il T6 for use in North America per UL E203312 Special Conditions for Safe Use All Valves Wiring must be in accordance with North American Class l Division 2 or European Zone 2 Category 3 wiring methods as applicable except for valves requiring intrinsically safe wiring as stated above Field Wiring must be suitable for at least 100 The wiring junction box provides earth ground terminals if needed for a separate earth ground to meet wiring requirements T3 reflects conditions without process fluid The surface temperature of this valve approaches the maximum temperature of the applied process media It is the responsibility of the user to ensure that the external environment contains no hazardous gases capable of ignition in the range of the process media temperatures Compliance with the Machinery Directive 2006 42 EC noise measurement and mitigation requirements is the responsibility of the manufacturer of the machinery into which this product is incorporated The risk of electrostatic discharge is reduced by
39. 74 Figure 1 3b Electrical Schematic and Wiring Diagram Triple LVDT 6 and 8 valves only Woodward 5 Gas Stop Ratio Valve Sensor is used as shown below HAZARDOUS SIDE 1 NON HAZARDOUS SIDE Manual 26620 NOTES 1 gt p Al barriers must be mounted and installed in compliance with the barrier manufacturer s requirement P F barriers ore by Pepperl Fuchs GmbH Barrier board Fort 2956 THS Certification TC15714 Certification to Pepperi Fuchs GB Lid Oldham England Performance Category and Group Performance category ig Group Rating 12 V z1 41uF lo 82 ma Lo 5 52 mH z0 24 W Borrier board Port Mo 2964 Certification TC15713 Certification to Pepperi Fuchs GB Lid Oldham England Performance Category and Performance category ia Group Rating Uo 12 V Co 1 41pF 12 ma Lo 9240 mH 0 04 W Inrinsic Safe parameters Primary Li 0 0 mH Cim0 0 pF Secondary Lie2 50 mH Ci 0 0 pF Ambient Temperature 20 5 is the grounding terminal for holding the intrinsically safe explosion protection structure The outer wiring of each channel shall be carried out independently for multiple channel unit For single channel unit this does not apply For single channel unit the second third channels do not exist The input pewer source and voltages
40. CATOR 4 1 1250 115 CONDUIT THREAD 7 WIRING ACCESS TO JUNCTION BOX EXTERNAL b GROUND SCREWS gt ACCESS COVER pee FOR RIGGING BLOCKS WARNI BODILY INJURY WILL RESULT IF THESE NUTS ARE REMOVED 1 NU 192 08 k N 4 Z Z Zu 10 037 DRY CC 254 93 E X H AN 1 VALVE ACCESS COVER IN Da J s D N 1 N BN N M N EM pw N SN N b N N N 6 458 18 5 X 16 4 02 47 6e X 2 A j 7 8 262 089 04 10 4 FRONT VIEW Figure 1 11 Gas Stop Ratio Valve Outline Drawing 8 inch with 3 LVDTs Woodward 2
41. Characteristics 2 CHAPTER 2 STOP RATIO VALVE OPERATION 23 CHAPTER STANDARD COMPONENT 5 24 Triple Coil Electrohydraulic Servo Valve Assembly 24 Trip Relay Valve Assembly 24 Hydraulic Filter Assembly 25 Position Feedback 5 25 CHAPTER 4 INSTALLATION 26 u ans 26 s Z NORTE TEMP 27 AS CAA ON 27 Hydraulic a 28 Electrical Connections 28 TT teen en en 29 Flectionie a ee ee 29 CHAPTER 5 MAINTENANCE AND HARDWARE REPLACEMENT 31 eT 31 Hardware 31 Troubleshooting Charts 36 CHAPTER 6 SERVICE OPTIONS 38 Product Service 38 Woodward Factory Servicing Options ss 39 Returning Equipment for Repair ss 39 Replacement 40 Engineering o o DET 40 How to Contact ss 41 Technical Assistance La
42. J on mae 7 2 b 260 0 8b 4 eL 01 02 05 INCH M m CENTER GRAVITY V Figure 1 b Gas Stop Ratio Valve Outline Drawing 6 inch except SS 260 Woodward 14 26620 Gas Stop Ratio Valve WIRES FROM SERVO 1627 671 ELECTRICAL ENCLOSURE OP VIEW M6 GROUND THREAD 6 IN CLASS 300 RF FLANGE WIRES FROM LVDD SE k ol 5 GROUND THREAD 2 ae N FA 2 N ES E SN KD 0 N 12 90 2 55 63 8 y 5 AW Ye x M6 GROUND THREAD M6 GROUND THREAD 2 10 AWG MAX TERMINAL BLOCKS 4
43. ML VIEW B _ 8 Es Th p H HI Eg 1 LL MUN N q Ten LE zx IL B 1 POSITION INDICATOR pA dT 2 4 7 I d Li ch ACCESS COVER in FOR RIGGING BLOCKS M _ BS T M 2 AC A lc Le mi 4 9 LN AH 1250 115 NPT CONDUIT THREAD 2 4 37 657 E WIRING ACCESS TO JUNCTION BOX 85646 2 190 MIN x EXTERNAL GROUND SCREWS 23114 WIRING ACCESS 9N COVER CLEARANCE 3 625 DRY CG f il 1 406 DRY CG WARNING 35 72 BODILY INJURY WILL RESULT IF THESE NUTS ARE REMOVED 2 1 lt LL 7 a 2 45 37 z M Pq ID Cl 10037 DRY CG 254 93 He E 1 1 H MN N THE VALVE ACCESS COVER d A T 6 INCH FLANGELESS V200 CLASS 600 SERIES BALL CONTROL a VALVE 7 810 198 38 260 0854 95 89 1065 06 1 18 Figure 1 9a Gas Stop Ratio Valve Outline Drawing 6 inch with 3 LVDTs SS 260 Woodward
44. NF straight thread port 8 Return Port 1 312 20 UNF straight thread port 16 7 2 to 8 8 mA null bias 0 8 0 32 mA Two part Epoxy Actuation Forces 3 4 amp 6 valves 6 amp 8 valves opening at 1200 psig 8274 kPa small large actuator closing via spring Opening Force Fully Extended 811 16 3607 1200 16 5338 Fully Retracted 1581 1b 7032N 3085 Ib 13 722 N Closing Force Fully Extended 2075 9230 4690 16 20 861 Fully Retracted 1305 16 5805 N 2805 16 12 477 Better than 99 5 over 8760 hour period Per Fisher Rosemount Catalog 12 Small actuator used on 3 4 and 6 valves with HD Metal or TCM Ultra seals Large actuator used on 6 valves with SS 260 seals as well as on 8 valves with HD Metal or TCM Ultra seals NOTE Vee Ball is a trademark of Fisher Rosemount Minimum Burst Fluid Pressure 4250 psig 34 475 kPa minimum per SAE J214 2 Woodward 26620 Gas Stop Ratio Valve
45. Stop Ratio Valve Declaration of Conformity gt Pressure Equipment Directive 97 23 EC FISH ER EMERSON Process Mana g ement Fisher Controls International LLC 1658 4725 Highway 75 South Sherman 75091 1658 USA 903 868 3200 903 868 3230 Name and address of manufacturer European Representative Fisher Controls International LLC Valve Division Emerson Process Management P O Box 1658 Rue Paul Baudry 4725 Highway 75 South BP 10 68701 Sherman TX 75091 1658 Cernay France USA Name and address of the Notified Body monitoring the manufacturer s QA system Hartford Steam Boiler International GmbH Landersumer Weg 40 D 48431 Rheine Germany Description of Pressure Equipment Valve Category III Type V300 Conformity Assessment Module H Serial Number s 18972409 Notified Body 1 0 Number 08 1 EC Type Examination Certificate Not applicable EC Design Examination Certificate B1 Not applicable EC Certificate of Conformity Not applicable PED Quality Assurance Certificate HSB 07 08 025 03 echnical Standards and Specifications Used Diffusers ASME 8 PV Code Section VIII Division 1 Valves ASME B16 34 EN 1092 for DIN flanges Whisper Disk ASME 8 PV Code Section VIII Division 1 We hereby declare that the pressure equipment detailed above and information given is in compliance with the Pressure Equipment Directive 97 23 EC Authorized Person for the Manufacturer Eric Wil
46. Valve Manual 26620 DECLARATION OF INCORPORATION Of Partly Completed Machinery 2006 42 EC Manufacturer s Name WOODWARD GOVERNOR COMPANY WGC Manufacturer s Address 1000 E Drake Rd 3800 N Wilson Ave Fort Collins CO USA 80525 Loveland CO USA 80538 Model Name s Number s Gas Stop Ratio Valves consisting of an electrohydraulic actuator and gas valve This product complies where applicable with the following Essential Requirements of Annex 1 1 1 1 2 1 3 1 4 1 5 1 6 1 7 The relevant technical documentation is compiled in accordance with part B of Annex VII Woodward shall transmit relevant information if required by a reasoned request by the national authorities The method of transmittal shall be agreed upon by the applicable parties This product must not be put into service until the final machinery into which it is to be incorporated has been declared in conformity with the provisions of this Directive where appropriate The undersigned hereby declares on behalf of Woodward Governor Company of Loveland and Fort Collins Colorado that the above referenced product is in conformity with Directive 2006 42 EC as partly completed machinery MANUFACTURER Mmas kc Signature NS Arlen McMurray _ Full Quality Manager Position WGC Fort Collins CO USA Place Sl Dee 0 Date 5 09 1182 REV 9 00146 04 02 01 44 26620 Gas
47. al 26620 30 345 29 979 770 76 761 47 30 118 29 546 769 750 47 LU FILTER FILTER ASS CLEARANCE 0 500 635 TRIP 1062 12 ESSUR UN e B THREAD STRAIGH HYDRAULIC HR EAD 12 SUPPLY 50 16 UNF 2B THREAD STRAIGHT 9 259 8 109 y 23518 BE 6 411 205 97 LESE I 2 X LIFTING EYES 70 43 52 85 64 08 33 18 P d 24 i a OW 2 SV 1 p M N P EY LT a T T TRIP HYD 2 PRESS SUPPLY 42 Pe QT Hex H E 355 60 x _ RE CARTRIDGE EMBLY REMOV Figure 1 5b Gas Stop Ratio Valve Outline Drawing 3 inch F GRAVITY THREAD PORT lt 10 Woodward 26620 Gas Stop Ratio Valve WIRES FROM SERVID 1627 671 ELECTRICAL ENCLOSURE
48. anual 26620 Gas Stop Ratio Valve Functional Characteristics Functional Requirement Gas Stop Ratio Valve Valve Type Fisher Vee Ball Design V300 or V300 Series or V200 Series B Flangeless HD Metal TCM Ultra 55 260 seals Position Accuracy 1 full scale over 25 F 14 C deviation from calibration Position Repeatability 0 5 of point over the range of 10 to 100 Hydraulic Fluid Type Petroleum Based hydraulic fluids as well as fire resistant hydraulic fluids such as Fyrquel EHC Maximum Operating Hydraulic 1200 to 1700 psig 8274 to 11 722 kPa Supply Pressure design at 1600 psig 11 032 kPa Proof Test Fluid Pressure Level 2550 psig 20 685 kPa minimum per SAE J214 Prod Test Fluid Filtration Required 10 15 um at 75 Beta Hydraulic Fluid Contamination Per ISO 4406 code 18 16 13 max code 16 14 11 preferred Level Actuator Ambient Temperature 20 to 180 F 29 to 82 C Hydraulic Fluid Temperature 80 to 170 F 27 to 77 C Vibration Test Level Random 0 01500 gr Hz from 10 to 40 Hz ramping down to 0 00015 gr Hz at 500 Hz 1 04 Grms Limited to 30 g by servo valve Less than 0 200 seconds 100 096 stroke Open Slew Time 5 to 95 in 0 500 0 15 seconds Close Slew Time 95 to 5 in 0 500 0 15 seconds relative to hydraulic return Drop out 22 6 psid 152 x41 kPa Hydraulic Fluid Connections Trip Relay Pressure 1 062 12 UNF straight thread port 12 Supply 0 750 16 U
49. are also proportional to the current above null supplied to the torque motor above the null point If the control system requires a rapid movement to reduce fuel pressure downstream of the stop ratio valve the total current is reduced well below the null current In such a condition the actuator piston cavity is connected to the hydraulic drain circuit The flow rate returning from the upper piston cavity of the valve is proportional to the magnitude of the total current below the null value The flow rate and closing velocity of the valve are in this case proportional to the total current below the null point Near the null current the servo valve essentially isolates the upper piston cavity from the hydraulic supply and drain and the upper piston pressure and spring load are balanced to maintain a constant position The control system which regulates the amount of current delivered to the coils modulates the current supplied to the coil to obtain proper closed loop operation of the system Trip Relay Valve Assembly The stop ratio valve utilizes a three way two position hydraulically operated valve to switch the position of the gas stop ratio valve When the trip circuit pressure increases above 24 6 psid 165 41 kPa relative to hydraulic drain pressure the three way relay valve shifts position The servo valve control port is then connected to the actuator upper piston cavity and this interconnecting route is isolated from the drai
50. atc of the control system supplying the barriers shall not exceed AC 250 V 50 60 Hz DC 250 V at both Hormal end abnormal conditions This drawing is for three channel LVDT For two channel unit ignore Channel 3 For Single Channel unit ignore Channels 2 and 3 Figure 1 4a LVDT Barrier Wiring Diagram TIIS requirement Japan This figure applies to TIIS requirement for Japan only Woodward Gas Stop Ratio Valve Manual 26620 1760 gt HUS gt M Ye 6 6 lt SI E 25 422 RW utu ZAIN z B 400 WL Bi BOS 5 Z Y lt 29 P H32 S 15 1 C G G e C ka 1 9 S ayer AOSZ 20 2 IXEN HR WES BH 3 3 q V in AOSZ 2Q 2v 369 18 8 49 gla ens i EANO mq z HL 4 6 EH z QU AG u 8 8 1 Figure 1 4b Servo Valve Barrier Wiring Diagram TIIS requirement Japan This figure applies to 5 requirement for Japan only Woodward Gas Stop Ratio Valve 26620 Notes for Figures 1 5 through 1 11 1 These general reference outline drawings apply to various Woodward Gas Fuel Stop Ratio valves Consult Woodward for the latest outline drawing for your particular stop ratio valve 2 Installation Orientation Pipe supported
51. atio Valve Outline Drawing 6 inch SS 260 16 Figure 1 9a Gas Stop Ratio Valve Outline Drawing 6 inch with 3 LVDTs 2 22745 0 m PA A re 17 Figure 1 9b Gas Stop Ratio Valve Outline Drawing 6 inch with 3 LVDTs SS 260 Figure 1 10a Gas Stop Ratio Valve Outline Drawing 8 inch with 2 LVDTs 19 Figure 1 10b Gas Stop Ratio Valve Outline Drawing 8 inch with 2 LVDTs 20 Figure 1 11a Gas Stop Ratio Valve Outline Drawing 8 inch with 3 LVDTs 21 Figure 1 11b Gas Stop Ratio Valve Outline Drawing 8 inch with 3 LVDTs 22 Figure 4 1 Stop Ratio Valve Block 29 Figure 4 2 Structures for PID Control 30 Figure 5 1 Stroke Measurement Attachment 35 Table 3 1 Recommended Control Gain Values for Different Control Types 30 Woodward 26620 Gas Stop Ratio Valve Warnings and Notices Important Definitions This is the safety alert symbol It is used to alert you to potential A personal injury hazards Obey all safety messages that follow this symbol to avoid possible injury or death DANGER Indicates a hazardous situation which if not avoided will result in death or serious injury WARNING Indicates a hazardous situation which if not avoided could result in death or serious injury CAUTION Indicates hazardous situati
52. e difficult to unscrew due to the thread locking feature incorporated into the spring plate 12 Obtain replacement LVDT and verify part number and revision with existing unit 13 Install replacement LVDT rod into spring plate positioning the rod height to approximately match the other LVDT rod height 14 Install the 0 375 24 UNF jam nut onto the LVDT rod but do not torque nut at this time 15 Carefully slide replacement LVDT through upper mounting plate and over the LVDT rod Be very careful not to force the LVDT at any time since this could damage the LVDT rod 16 Carefully reinstall the good LVDT and bracket assembly through upper mounting plate and over the LVDT rod Be very careful not to force the LVDT at any time since this could damage the LVDT rod 17 Install the two 0 250 20 UNC socket head cap screws holding the LVDT bracket to the upper mounting plate and torque to 58 78 15 6 6 8 8 N m 18 Install replacement LVDT into mounting bracket and torque 0 500 20 UNF mounting nut to 400 500 Ib in 45 56 19 Mark the LVDT wire sets so that each set of LVDT wires is distinct Once the wires are installed into the electrical box it will be difficult to distinguish the sets if they are not marked 20 Install wiring through conduit and into electrical box 21 Connect conduit to LVDTs and torque to 450 550 Ib in 51 62 22 Torque conduit to electrical box to 450 550 Ib in 51 62 23 Insta
53. e hot enough or cold enough to be a hazard Use protective gear for product handling in these circumstances Temperature ratings are included in the specification section of this manual Do not lift or handle the valve by any conduit Lift or handle the valve only by using the eyebolts The surface temperature of this valve approaches the maximum temperature of the applied process media It is the responsibility of the user to ensure that the external environment contains no hazardous gases capable of ignition in the range of the process media temperatures 26 Woodward 26620 Gas Stop Ratio Valve Unpacking The valve is shipped in an airtight bag with desiccant to ensure non corrosive environment We recommend that the valve be kept in its shipping container until installation If the valve is to be stored for extended periods of time encase the valve in an airtight container with desiccant Piping Installation Refer to ANSI B16 5 for details of flange gasket and bolt types and dimensions Verify that the process piping flange to flange face dimensions meet the requirements of the outline drawings Figures 1 5 through 1 11 within standard piping tolerances The valve should mount between the piping interfaces such that the flange bolts can be installed with only manual pressure applied to align the flanges Mechanical devices such as hydraulic or mechanical jacks pulleys chain falls or similar should never be us
54. e requires no maintenance or adjustment in preparation for or during normal operation Woodward recommends routine checks of the DP gauge on the filter assembly to verify that the filter is not partially clogged If the DP indicator shows red the filter element needs to be replaced In the event that any of the standard components of the valve become inoperative field replacement of certain components is possible Contact a Woodward representative for assistance Hardware Replacement To prevent possible serious personal injury or damage to equipment be sure all electric power hydraulic pressure and gas pressure have been removed from the valve and actuator before beginning any maintenance or repairs EXPLOSION HAZARD Do not connect or disconnect while circuit is live unless area is Known to be non hazardous Substitution of components may impair suitability for Class Division 2 or Zone 2 External fire protection is not provided in the scope of this product It is the responsibility of the user to satisfy any applicable requirements for their system Do not lift or handle the valve by any conduit Lift or handle the valve only by using the eyebolts Due to typical noise levels in turbine environments hearing protection should be worn when working on or around the Gas Stop Ratio valve The surface of this product can become hot enough or cold enough to be a hazard Use protective gear for product handling in these circu
55. ed to force the piping system to align with the valve flanges The stop ratio valve is designed for support by the piping flanges alone additional supports are neither needed nor recommended Grade 5 metric class 8 8 bolts or studs should be used to install the valve into the process piping The length and diameter for Class 300 flanges shall conform to the following table according to the valve flange size er eR Le Size Bolts Bolts Stud Length Length 25 mm 16 mm 76 2 mm 63 5 mm Em D wm 51 mm 19 mm 88 9 mm 76 2 mm xm p Ems em a 76 mm 19 mm 108 0 mm 88 9 mm 5 wm eim emo 102 mm 19 mm 114 3 mm 95 2 mm Wm EO ee sar ss 152 mm 19 mm 120 6 mm 108 0 mm 203 mm 22 mm 139 7 mm 120 6 mm Flange gasket materials should conform to ANSI B16 20 The user should select a gasket material which will withstand the expected bolt loading without injurious crushing and which is suitable for the service conditions When installing the valve into the process piping it is important to properly torque the stud bolts in the appropriate sequence in order to keep the flanges of the mating hardware parallel to each other A two step torque method is recommended Once the studs bolts are hand tightened torque the studs bolts in a crossing pattern to half the torque value listed in the following table Once all studs bolts have been torqued to half the appropriate value repeat the pattern until the rated torque value is obtained Bol
56. he assembly by sliding the open end of the cartridge upward onto the nipple Install the filter bowl Tighten only by hand o Trip Relay Valve Cartridge The trip relay valve cartridge is located in the hydraulic manifold block Hydraulic fluid may spill during cartridge removal IMPORTANT 1 Using a 1 5 inch 38 mm wrench loosen the trip relay valve from hydraulic manifold Slowly remove the cartridge from the manifold Obtain new trip relay valve cartridge and verify part number and revision with existing unit Verify that all O rings and backup rings are present on new cartridge Lubricate O rings with hydraulic fluid or petroleum jelly Install cartridge into manifold housing Torque to 80 90 Ib ft 108 122 N m dis PR 39 Woodward Manual 26620 Gas Stop Ratio Valve Servo Valve The servo valve is located on the hydraulic manifold directly above the filter assembly Refer to the outline drawings Figures 1 5 through 1 11 There could be a substantial amount of hydraulic fluid upon removal IMPORTANT 1 Remove the cover to the electrical junction box 2 Disconnect the servo valve wires from the connector blocks as shown in the wiring diagram Figure 1 3a or 1 30 3 Loosen the conduit fittings from the electrical box and the servo valve 4 Carefully remove the conduit from the servo valve and pull the wiring out of the conduit 5 Remove the four 10 32 UNF socket head cap
57. ility Phone Number Facility Phone Number Brazil 55 19 3708 4800 gt Brazil 55 19 3708 4800 Brazil 55 19 3708 4800 China 86 512 6762 6727 China 86 512 6762 6727 China 86 512 6762 6727 Germany 49 0 21 521451 Germany 49 711 78954 510 India 91 129 4097100 India 91 129 4097100 India 91 129 4097100 81 43 213 2191 81 43 213 2191 81 43 213 2191 82 51 636 7080 82 51 636 7080 Korea 82 51 636 7080 Netherlands 31 23 5661111 Poland 48 12 295 1300 The Netherlands 31 23 5661111 Poland 48 12 295 13 00 United States 1 970 482 5811 United States 1 970 482 5811 United States 1 970 482 5811 You can also locate your nearest Woodward distributor or service facility on our website at www woodward com directory Technical Assistance you need to telephone for technical assistance you will need to provide the following information Please write it down here before phoning Your Name Site Location Phone Number Fax Number Engine Turbine Model Number Manufacturer Number of Cylinders if applicable Type of Fuel gas gaseous steam
58. lectrical and mechanical interfaces have been designed for quick and easy assembly or removal of the valve at the factory or in the field The components include an on board hydraulic filter electrohydraulic servo valve trip valve single acting hydraulic cylinder and dual LVDTs the 6 8 valves also have the option for triple LVDTs Optimum control of the gas turbine requires that the actuator and valve accurately and quickly track the demand signals transmitted by the control The stop ratio valve has been designed to provide output forces that exceed the opening and closing requirements with some margin The additional margin helps ensure that the system moves rapidly even under service conditions where the valve has been contaminated or worn The hydraulic trip relay valve has been selected to provide high operating force margins high flow capacity and to ensure the desired closure rate of the valve under trip conditions By using a long actuation rod between the hydraulic cylinder and the valve lever arm the side loading forces on the actuator shaft and seals are greatly reduced decreasing the wear between sliding parts and increasing the useful service life of the system The ample distance between the wetted heavy duty linear slide rings within the stop ratio valve accommodates any remaining side load These provisions provide extended service life even in severe service conditions Woodward 1 Gas Stop Ratio Valve M
59. liamson Title DOCUMENTATION TECH Woodward Note This is SAMPLE declaration of conformity only The original serialized DoC for each 4 Nov 2009 individual valve is shipped with the valve Date Declaration_mtnCat_Ill_hsb 06 15 04 Signature Woodward 45 appreciate your comments about the content of our publications Send comments to icinfo woodward com Please reference publication 26620D B26620 D For more information contact Drake Controls U S Toll Free 877 544 5201 Lada 5 Mexico 888 418 DRAK 3725 www drakecontrols com PO Box 1519 Fort Collins 80522 1519 USA 1000 East Drake Road Fort Collins CO 80525 USA Phone 1 970 482 5811 e Fax 1 970 498 3058 Email and Website www woodward com Woodward has company owned plants subsidiaries and branches as well as authorized distributors and other authorized service and sales facilities throughout the world Complete address phone fax email information for all locations is available on our website
60. ll jammed Service Vee Ball per Fisher manual Form 5290 Type Vee Ball Servo valve command current incorrect The sum of the current through the three coils of the servo valve must be less than the null bias of the servo valve for the gas valve to close Trace and verify that all wiring is in accordance with the electrical schematic Figures 1 3a 1 3b or 1 4b and the GE system wiring schematic s Pay special attention to the polarity of the wiring to the servo valve and LVDT Servo valve failure Replace servo valve LVDT failure Replace LVDT Springs broken Return actuator to Woodward for service Linkage broken Return actuator to Woodward for service Vee Ball jammed Service Vee Ball per Fisher manual Form 5290 Type Vee Ball Hydraulic filter clogged Check the differential pressure indicator on the filter housing Servo valve spool sticking Servo valve internal filter Excessive friction in Vee Ball assembly Verify hydraulic contamination levels are Within recommendations of Chapter 1 The use of dither may improve performance in contaminated systems Replace servo valve Service per Fisher manual Form 5290 Type Vee Ball and Fisher Errata Sheet Vee Ball 55 260 service service Hydraulic contamination level is excessive System is oscillating seal life is proportional to distance traveled Even small oscillations on the order of 1 at slow f
61. ll wires into connector blocks as shown in the wiring diagram Figure 1 3a or 1 3b If it is necessary to cut wires for installation be sure to retain at least one service loop of wiring 24 Reattach the hydraulic drain connection 25 Once the LVDT is installed it must then be calibrated as described below LVDT Calibration 1 Whenever an LVDT is replaced or whenever its core rod adjustment is disturbed the LVDT output voltage must be calibrated in the following way Use care and follow all instructions after removal of the spring access cover Internal components can potentially crush fingers and some components are held under significant force 2 Shutoff the hydraulic supply to the stop ratio actuator 3 Remove the access cover from the side of the stop ratio actuator housing by removing the four 10 32 UNF screws and washers exposing the core rod adjustment 34 Woodward 26620 Gas Stop Ratio Valve 4 Adjust the LVDT rod so that the output of the replaced is 0 7 0 1 Vrms with the stop ratio actuator fully retracted gas valve fully closed 5 Tighten 1 375 24 UNF rod jam nut to 270 320 Ib in 31 36 6 Install the stroke measurement attachment bar Woodward part number 1327 945 provided with the stop ratio actuator to the moving plate of the actuator as shown in Figure 5 1 7 Attach an accurate stroke measurement device dial indicator or equivalent
62. mstances Temperature ratings are included in the specification section of this manual See the outline drawings Figures 1 5 through 1 11 for the location of items Woodward 31 Gas Stop Ratio Valve Manual 26620 Hydraulic Filter Assembly Cartridge The hydraulic filter is located on the hydraulic manifold hanging directly under the servo valve Replacement of Filter Assembly 1 Remove four 0 312 18 UNC socket head cap screws 2 Remove the filter assembly from manifold block The filter contains a large amount of hydraulic fluid that may be IMPORTANT spilled during filter removal 3 Remove the two O rings present in the interface between the filter and the manifold 4 Obtain a new filter assembly 5 Place two new O rings in the new filter assembly 6 Install filter onto manifold assembly Be sure to place the filter in the correct orientation See the outline drawings Figures 1 5 through 1 11 7 Install four 0 312 18 cap screws through filter and torque into manifold to 244 256 Ib in 27 6 28 9 Replacement of Filter Cartridge The filter contains a large amount of hydraulic fluid that may be IMPORTANT spilled during filter removal Using a 1 5 16 inch 33 mm wrench loosen the bowl from the filter assembly Remove the filter element by pulling it downward Obtain a new filter element Lubricate the O ring on the ID of the cartridge with hydraulic fluid Install the cartridge into t
63. n passage Actuation pressure is routed to the upper piston cavity of the valve allowing the gas stop ratio actuator to function As the trip circuit supply pressure reduces below 22 6 psid 152 41 kPa relative to hydraulic drain pressure the three way relay valve shifts position such that the upper piston cavity is connected to the hydraulic drain circuit and isolated from the hydraulic supply As the pressure falls within the upper piston cavity the return spring rapidly returns the actuator piston to the upward position closing the stop ratio valve and shutting off fuel to the engine 24 26620 Gas Stop Ratio Valve Hydraulic Filter Assembly The stop ratio actuator is supplied with an integrated high capacity filter This broad range filter protects the internal hydraulic control components from large oil borne contaminants that might cause hydraulic components to stick or operate erratically The filter is supplied with a visual indicator which indicates when the pressure differential exceeds the recommended value indicating that replacement of the element is necessary LVDT Position Feedback Sensors The stop ratio actuator uses dual LVDTs for position feedback An optional third LVDT is available on the 6 and 8 stop ratio actuators only The LVDTs are factory set to give 0 7 0 1 Vrms feedback at minimum position and 3 5 0 5 Vrms feedback at maximum position The actual voltage values fo
64. ncerning equipment and protective systems intended for use in potentially explosive atmospheres 2004 108 EC COUNCIL DIRECTIVE of 15 December 2004 on the approximation of the laws of the Member States relating to electromagnetic compatibility and all applicable amendments 2004 108 EC is met by evaluation of the physical nature to the EMC protection requirement Electromagnetically passive or benign devices are excluded from the scope of the Directive 2004 108 EC however they also meet the protection requirement and intent of the directive Marking s Category 3 Group Ex nA Gc 54 Applicable Standards 60079 0 2012 Electrical apparatus for explosive gas atmospheres Part 0 General Requirements EN 60079 15 2010 Electrical apparatus for explosive gas atmospheres Part 15 Type of protection n EN61000 6 4 2007 EMC Part 6 4 Generic Standards Emissions for Industrial Environments By technical evaluation not testing EN61000 6 2 2005 EMC Part 6 2 Generic Standards Immunity for Industrial Environments By technical evaluation not testing We the undersigned hereby declare that the equipment specified above conforms to the above Directive s R Signature Christopher Perkins Full Name Engineering Manager Position Woodward Inc Fort Collins CO USA __ Place Date 5 09 1185 Rev 16 22 Jan 2009 00146 04 02 03 Rev L Woodward 43 Gas Stop Ratio
65. nction box and tighten screws LVDT Replacement To prevent possible personal injury do NOT remove the spring cover which is spring loaded to over 1000 Ibs 4448 The LVDTs are located on the upper mounting plate located on the top of the large spring cylinder and below the hydraulic manifold Refer to the outline drawings Figures 1 5 through 1 11 Remove the cover to the electrical junction box Disconnect each set of LVDT wires from the connector blocks Loosen the conduit fittings from the electrical box and from each LVDT Carefully remove the conduit from the LVDTs and pull the wiring out of the conduit x Woodward 33 Gas Stop Ratio Valve Manual 26620 5 Disconnect the hydraulic drain connection for improved working space There could be a substantial amount of hydraulic fluid upon removal IMPORTANT 6 Remove the 0 500 20 UNF mounting nut from the defective LVDT only 7 Remove the two 0 250 20 socket head cap screws holding the LVDT bracket to the upper mounting plate 8 Carefully remove the LVDT assembly from the valve by lifting vertically upwards Take care not to damage the good LVDT housing and rod 9 Remove the four 10 32 UNF screws holding the access cover on the side of the spring cylinder to gain access to the LVDT rods 10 Remove 0 375 24 UNF jam nut from defective LVDT rod 11 Remove the defective LVDT rod using the 0 250 inch flats at the top of the threads The rod will b
66. nic Controls Printed Circuit Boards and Modules Follow these precautions when working with or near the control 1 Avoid the build up of static electricity on your body by not wearing clothing made of synthetic materials Wear cotton or cotton blend materials as much as possible because these do not store static electric charges as much as synthetics 2 Do not remove the printed circuit board PCB from the control cabinet unless absolutely necessary If you must remove the PCB from the control cabinet follow these precautions Donottouch any part of the PCB except the edges Donottouch the electrical conductors the connectors or the components with conductive devices or with your hands e When replacing PCB keep the new in the plastic antistatic protective bag it comes in until you are ready to install it Immediately after removing the old PCB from the control cabinet place it in the antistatic protective bag Woodward 26620 Gas Stop Ratio Valve Regulatory Compliance European Compliance for Marking These listings are limited only to those units bearing the CE Marking EMC Directive Declared to 2004 108 EC COUNCIL DIRECTIVE of 15 December 2004 on the approximation of the laws of the Member States relating to electromagnetic compatibility and all applicable amendments 2004 108 EC is met by evaluation of the physical nature to the EMC protection requirement Electromagnetically pa
67. nstalled in nA applications Other European Compliance Compliance with the following European Directives or standards does not qualify this product for application of the CE Marking Machinery Compliant as partly completed machinery with Directive Directive 2006 42 EC of the European Parliament and the Council of 17 May 2006 on machinery Pressure Compliant as SEP per Article 3 3 to Pressure Equipment Equipment Directive 97 23 EC of 29 May 1997 on the approximation of Directive laws of the Member States concerning pressure applies to equipment actuator portion of valve assembly only Woodward V Gas Stop Ratio Valve Manual 26620 ATEX Exempt from the non electrical portion of the Directive 94 9 EC due to no potential ignition sources per EN 13463 1 Other International Compliance TIIS Applicable to servo valve and LVDT Where customer has requested TIIS compliance the servo valve and LVDT TIIS marked and must be installed with barriers as shown in the Installation chapter GOST R Certified for use in explosive atmospheres within the Russian Federation per GOST R certificate POCC US 506 B01025 as ExnAIIT3 X North American Compliance Suitability for use in North American Hazardous Locations is the result of compliance of the individual components LVDT CSA Certified for Class Divisions 1 and 2 Groups C D 4 use in the United States and Canada per CSA 15133
68. off highway Mobile Applications Unless Woodward s control functions as the supervisory control customer should install a system totally independent of the prime mover control system that Automotive monitors for supervisory control of engine and takes appropriate Applications action if supervisory control is lost to protect against loss of engine control with possible personal injury loss of life or property damage Woodward Gas Stop Ratio Valve Manual 26620 To prevent damage to a control system that uses an alternator or N 0 battery charging device make sure charging device is turned off before disconnecting the battery from the system Battery Charging Device Electrostatic Discharge Awareness Electronic controls contain static sensitive parts Observe the N following precautions to prevent damage these parts Discharge body static before handling the control with power to the control turned off contact a grounded surface and maintain Electrostatic contact while handling the control Precautions Avoid all plastic vinyl and Styrofoam except antistatic versions around printed circuit boards Do not touch the components or conductors on a printed circuit board with your hands or with conductive devices To prevent damage to electronic components caused by improper handling read and observe the precautions in Woodward manual 82715 Guide for Handling and Protection of Electro
69. on which if not avoided could result in minor or moderate injury NOTICE Indicates a hazard that could result in property damage only including damage to the control IMPORTANT Designates an operating tip or maintenance suggestion The engine turbine or other type of prime mover should be equipped with an overspeed shutdown device to protect against runaway or damage to the prime mover with possible personal injury Overspeed loss of life or property damage Overtemperature The overspeed shutdown device must be totally independent of the Overpressure prime mover control system An overtemperature or overpressure shutdown device may also be needed for safety as appropriate The products described in this publication may present risks that could lead to personal injury loss of life or property damage Always wear the appropriate personal protective equipment PPE for the job Personal Protective at hand Equipment that should be considered includes but is not limited to Equipment e Eye Protection Hearing Protection Hard Hat Gloves Safety Boots Respirator Always read the proper Material Safety Data Sheet MSDS for any working fluid s and comply with recommended safety equipment Be prepared to make an emergency shutdown when starting the engine turbine or other type of prime mover to protect against runaway or overspeed with possible personal injury loss of life or property damage On and
70. oportional control only will result in position error Rigging Procedure Inside the electrical enclosure of the valve there is an adhesive label that contains the appropriate valve position as a percent of full stroke the physical stroke inches and the corresponding LVDT feedback signals for each LVDT assuming 7 0 Vrms excitation at 3000 Hz Once the control system is connected to the valve and control of the valve is established set the valve command position to 0 of full stroke Measure the feedback voltage from each LVDT Adjust the Offset in the feedback loop until the feedback voltage matches the documented values see the label inside the electrical enclosure for that position Adjust the command position to 100 of full stroke Adjust the Gain of the feedback loop until the LVDT feedback voltage matches the documented values Set the command position to close the valve Verify that the valve is closed visually and that the feedback voltage from the LVDT is 0 7 0 1 Vrms This process may have to be repeated to ensure the feedback voltages at both the 0 and 100 command positions match the documented values 30 Woodward 26620 Gas Stop Ratio Valve Chapter 5 Maintenance and Hardware Replacement Maintenance Any cleaning by hand or with water spray must be performed while the area is known to be non hazardous to prevent an electrostatic discharge in an explosive atmosphere The Gas Stop Ratio Valv
71. over but such speed variations do not always indicate fuel control or governing system faults Therefore when improper speed variations occur check all components including the engine or turbine for proper operation Refer to applicable electronic control manuals for assistance in isolating the trouble The following steps describe troubleshooting for the gas fuel stop ratio valve Disassembly of the gas fuel stop ratio valve in the field is not recommended due to the dangerous forces contained in the springs Under unusual circumstances where disassembly becomes necessary all work and adjustments should be made by personnel thoroughly trained in the proper procedures When requesting information or service help from Woodward it is important to include the part number and serial number of the valve assembly in your communication External hydraulic Static O ring seal s Replace O rings fitted to user leakage missing or deteriorated serviceable components filter servo valve trip relay valve as needed Otherwise return actuator to Woodward for service Dynamic O ring seal Return actuator to Woodward for missing or deteriorated service Internal hydraulic Servo valve internal Replace servo valve leakage O ring seal s missing or deteriorated Servo valve metering Replace servo valve edges worn Piston seal missing or Return actuator to Woodward for deteriorated service External gas fuel Piping gaskets Replace
72. permanent installation of the valve proper connection to the protective earth PE terminals and care when cleaning The valve should not be cleaned unless the area is known to be non hazardous vi Woodward Manual 26620 Gas Stop Ratio Valve EXPLOSION HAZARD Do not connect disconnect while circuit is live unless area is known to be non hazardous Substitution of components may impair suitability for Class Division 2 or Zone 2 RISQUE D EXPLOSION Ne pas raccorder ni debrancher tant que l installation est sous tension sauf en cas l ambiance est d cid ment non dangereuse La substitution de composants peut rendre ce mat riel inacceptable pour les emplacements de Classe l Division 2 ou Zone 2 Woodward vii Gas Stop Ratio Valve Manual 26620 Woodward 26620 Gas Stop Ratio Valve Chapter 1 General Information EE SSS The Woodward Gas Stop Ratio Valve performs a dual function for industrial or utility gas turbines One function rapidly shuts off fuel to the turbine fuel control system Another function provides accurate control of gas fuel pressure at the outlet of the stop ratio valve This pressure is applied to the inlets of the gas fuel control valve The Gas Stop Ratio Valve features a modular design and meets critical control characteristics while allowing the same valve design to accommodate a variety of stroke force output and mechanical interface arrangements The e
73. plied by the return springs pushes the actuation rod up rotating the valve to the closed position Two redundant LVDT position feedback transducers are also mounted within each actuator An optional third LVDT is available on the 6 and 8 stop ratio actuators only The LVDT sensor cores and support rods are connected to the main actuator output rod by a coupling arrangement guided on a bushing This guide bushing maintains LVDT alignment to minimize core damage due to sliding wear and the associated loss of Sensing accuracy Woodward 23 Gas Stop Ratio Valve Manual 26620 Chapter 3 Standard Component Details Triple Coil Electrohydraulic Servo Valve Assembly The stop ratio valve actuator utilizes a two stage hydraulic servo valve to modulate the position of the output shaft and thereby control the stop ratio valve The first stage torque motor utilizes a triple wound coil which controls the position of the first and second stage valves in proportion to the total electrical current applied to the three coils If the control system requires rapid movement of the valve to increase fuel pressure to the control valves the total current is increased well above the null current In such a condition supply oil is admitted to the cavity above the actuator piston The flow rate delivered to the upper piston cavity is proportional to the total current applied to the three coils Thus the actuator stroke velocity and the valve opening
74. r each LVDT are recorded on a label placed inside the actuator electrical box for reference during field calibration Woodward 25 Gas Stop Ratio Valve Manual 26620 Chapter 4 Installation General See the outline drawings Figures 1 5 through 1 11 for Overall dimensions Process piping flange locations Hydraulic fitting sizes Electrical connections Lift points and center of gravity Weight of the valve The design of the Vee Ball valve requires that the rotary drive shaft be mounted horizontally Additionally a vertical actuator position is generally preferred to conserve floor space as well as ease of making electrical fuel and hydraulic connections and changing the hydraulic filter element The stop ratio valve is designed for support by the piping flanges alone Additional supports are neither needed nor recommended The standard stop ratio valve is supplied with a left hand orientation as shown in the outline drawing The valve can be configured with a right hand orientation however this request must be on the purchase order at the time the order is placed for this change to take place External fire protection is not provided in the scope of this product It is the responsibility of the user to satisfy any applicable requirements for their system Due to typical noise levels in turbine environments hearing protection should be worn when working on or around the valve The surface of this product can becom
75. ra A 1 v SHOWN WITHOUT COVER SEE WIRING DIAGRAM 20 805 528 44 17 905 Y 145478 12 364 2 5 541 _ 31405 140 73 18 430 468 12 i i HYDRAULIC RETURN 1312 12 UN 2B THREAD lt STRAIGHT THREAD PORT C 16 LP POSITION INDICATOR 4 N D 1250 115 CONDUIT THREAD 4 u WIRING ACCESS TO JUNCTION BOX 137 637 956 45 ACCESS COVER 4 FOR RIGGING BLUCKS 1406 age 00 BODILY INJURY WILL RESULT IF THESE NUTS ARE REMOVED N 21 947 1557 45
76. requencies on the order of 0 1 Hz cause wear to accumulate rapidly Verify hydraulic contamination levels are within recommendations of Chapter 1 The use of excessive dither may reduce life in contaminated systems Determine and eliminate the root cause of oscillation Woodward 37 Gas Stop Ratio Valve Manual 26620 Chapter 6 Service Options Product Service Options If you are experiencing problems with the installation or unsatisfactory performance of a Woodward product the following options are available e Consult the troubleshooting guide in the manual e Contact the manufacturer or packager of your system e Contact the Woodward Full Service Distributor serving your area e Contact Woodward technical assistance see How to Contact Woodward later in this chapter and discuss your problem In many cases your problem can be resolved over the phone If not you can select which course of action to pursue based on the available services listed in this chapter OEM and Packager Support Many Woodward controls and control devices are installed into the equipment system and programmed by an Original Equipment Manufacturer OEM or Equipment Packager at their factory In some cases the programming is password protected by the OEM or packager and they are the best source for product service and support Warranty service for Woodward products shipped with an equipment system should also be handled through the OEM
77. rvo valve as indicated in Figures 1 3 and 1 4 Wiring Diagram For valves with TIIS requirements in Japan the servo valve wiring must be installed with barriers as shown in Figure 1 4b as required for use with the intrinsically safe method of protection LVDT Electrical Connection The LVDT cable must consist of two individually shielded twisted pairs for each separate pair should be used for each of the excitation voltages to each LVDT and a separate pair used for each of the feedback voltages from each For valves with TIIS requirements in Japan the LVDT wiring must be installed with barriers as shown in Figure 1 4a as required for use with the intrinsically safe method of protection Fuel Vent Port The fuel vent port must be vented to a safe location In normal operation this vent should have zero leakage However if excessive leakage is detected from this vent port contact a Woodward representative for assistance Electronic Settings Dynamic Tuning Parameters It is imperative that the correct dynamic characteristics of this valve be input into the control system to ensure that the operation of the valve control system is within acceptable limits Hull Bias Offset Error amp Valve Position Command Hull Bias Offset Torque Motor Servowvalve Transfer Integrator Hydraulic Cylinder Actuator KL T auLiet 1 L YDT Position Sensor
78. ssive or benign devices are excluded from the scope of the Directive 2004 108 EC however they also meet the protection requirement and intent of the directive Pressure Certified to Pressure Equipment Directive 97 23 EC of 29 Equipment 1997 the approximation of the laws of the Member Directive State concerning pressure equipment Category Bureau Fisher Valve Veritas CE 0041 PED H FVD 001 11 USA Module Fisher Controls International LLC Declaration of Conformity is provided with each Gas Stop Ratio Valve ATEX Declared to 94 9 EC COUNCIL DIRECTIVE of 23 March Potentially 1994 on the approximation of the laws of the Member States Explosive concerning equipment and protective systems intended for Atmospheres use in potentiallyexplosive atmospheres Directive Zone 2 Category 3 Group II Ex nA T3X Gc 1 54 See below for special conditions for safe use Valves with Intrinsically Safe Components ATEX Declared to 94 9 EC COUNCIL DIRECTIVE of 23 March Potentially 1994 on the approximation of the laws of the Member States Explosive concerning equipment and protective systems intended for Atmospheres use in potentiallyexplosive atmospheres Directive Zone 2 Category 3 Group II Ex nA Gc IP54 Special Conditions for Safe Use heLVDT and servo valve must be wired using barrier wiring drawings shown in Figure 1 4 Servo valve must not be replaced with one that has previously been i
79. t Exchange service are based on a flat rate plus shipping expenses You are invoiced the flat rate replacement exchange charge plus a core charge at the time the replacement unit is shipped If the core field unit is returned within 60 days a credit for the core charge will be issued Flat Rate Repair Flat Rate Repair is available for the majority of standard products in the field This program offers you repair service for your products with the advantage of knowing in advance what the cost will be All repair work carries the standard Woodward service warranty Woodward Product and Service Warranty 5 01 1205 on replaced parts and labor Flat Rate Remanufacture Flat Rate Remanufacture is very similar to the Flat Rate Repair option with the exception that the unit will be returned to you in new condition and carry with it the full standard Woodward product warranty Woodward Product and Service Warranty 5 01 1205 This option is applicable to mechanical products only Returning Equipment for Repair If a control or any part of an electronic control is to be returned for repair please contact your Full Service Distributor in advance to obtain Return Authorization and shipping instructions When shipping the item s attach a tag with the following information return authorization number name and location where the control is installed name and phone number of contact person complete Woodward part number s and serial
80. t Size 5 8 inch 16 150 155 19 8 203 210 N m 3 4 inch 19 mm 250 260 Ib f 339 353 N m 7 8 inch 22 mm 375 390 1 1 508 529 N m Woodward 27 Gas Stop Ratio Valve Manual 26620 Hydraulic Connections There are three hydraulic connections that must be made to each valve supply return and trip oil The connections to the valve are straight thread O ring style ports per SAE J514 The tubing up to the valve must be constructed to eliminate any transfer of vibration or other forces into the valve Make provisions for proper filtration of the hydraulic fluid that will supply the actuator The system filtration should be designed to assure a supply of hydraulic oil with a maximum ISO 4406 contamination level of 18 16 13 and a preferred level of 16 14 11 The filter element included with the actuator is not intended to provide adequate filtration over the entire life of the actuator The hydraulic supply to the actuator is to be 0 500 inch 12 70 mm tubing capable of supplying 10 US gallons min 18 L min at 1200 1700 psig 8274 11 722 kPa The hydraulic drain should be 1 00 inch 25 4 mm tubing and must not restrict the flow of fluid from the valve The drain pressure must not exceed 30 psig 207 kPa under any condition The trip relay valve supply should be 0 750 inch 19 05 mm tubing The Trip Relay Pressure should be above 40 psig 276 kPa to enable the valve to function Electrical Connections EXPLOSION HAZARD Do
81. this equipment outside its specified If the cover of this publication states Translation of the Original Instructions please note The original source of this publication may have been updated since this Translated translation was made Be sure to check manual 26371 Revision Status amp Publications Distribution Restrictions of Woodward Technical Publications to verify whether this translation is up to date Out of date translations are marked with Always compare with the original for technical specifications and for proper and safe installation and operation procedures Revisions Changes in this publication since the last revision are indicated by a black line alongside the text Woodward reserves the right to update any portion of this publication at any time Information provided by Woodward is believed to be correct and reliable However no responsibility is assumed by Woodward unless otherwise expressly undertaken Manual 26620 Copyright Woodward 2011 2013 All Rights Reserved 26620 Gas Stop Ratio Valve Contents UU WARNINGS AND NOTICES II ELECTROSTATIC DISCHARGE AWARENESS IV REGULATORY COMPLIANCE ss esse T J J J J T V CHAPTER 1 GENERAL INFORMATION 1 Gas Stop Ratio Valve Functional

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