Barton 199 DPU Manual - Part No. 9A-10030
Contents
1. 0 20 of full scale DP Housing Materials Ranges Refer to Table 1 1 1s nb i uodn q ej igeA e sBuiIAep UOISUBWIP uil nO 91euuixoidde 31 SUOISJBAUOD IAN 08 494 GZ LO HIN 3OVN 230w 0 p llioc ds eq ued SUOISI A dMS 000 9 pue O0S r O00 E Bueu equ GZ A OL 24 10 smojjaq juodu BU sAo j q zis zuip 24 u Au q qe Buesuoi lui zou oie sBuiids ebuey l dN uuolloq t L pue dol g L eae suono uuoo inss 1id piepue1s sanba uodn sjqeyjrene 949 q N V SN Sqnis Bulpjem suo INJO UUOD Jo s d pue s z s 194 0 eq 6 9 0 10 1equi 0S 0 ISd 004 0 91 9 A OZ 0 WO qe igAe s Buei Gq leIp uu lu equ GG 0 SZ 2M 0F 0 O 10 EQUI Z9 0 Z9 2 A SZ 0 SZ p 1 pio aq Aew Bue1 equ pZ 0 A 0S 0 B 19pio jeloeds uo q ieA e Sebue yids 10 18 1U99 o19Z SJ LON OACI 99 GZ S l 99 GZ S l eSs lIIn 10 99 u Nd u u tu Sel dsiq 99 ul NO Ul 09 Szt 92 99 OLS wLE 99 GZ 92 99 OLS tE pe H dH inss iq YBIH aLUNIOA 99 06t OS 99 G S S 99 06t OS 99 G29 S pe H d7 INss ld MOT 8N Hd t L lea ss lulels p Bioj r Lt 199 S ollv p 104 tr Lv l891S ollv p Bi1od 918 199 S ss lule1lS p B1oj3 equ 66 0 0 Jequ GZ O ueq 6 9 0 O Jeg 0 equ 66 0 O 1eqw GZ 0 2q 6 9 0 O Jeq 0 OM 00F 0 O1 9 M OL O ISA OOL O O ISA G 0 A2. 15 Table 4 3 NACE Bolt Torque Ratings SWP 2000 PSI 3000 PSI 4500 PSI 13 8 MPa 20 7 MPa 31 0 MPa 12 Pt Head Bolt 12 Pt Head Bolt 1 2 13 x 5 5 1 2 20 x 6 1 2 20 x 6 Bolt Material B7M L7M Steel B7M L7M Steel B7M L7M Steel Nut Size N A 1 2 20 1 2 20 Nut Part Number N A HSG O Ring N A N A Torque bs SPECIAL NOTES 1 Lubricants Molykote G paste Teflon base pipe dope graphite base grease or similar lubricants Lube first 2 threads only Do not lube bearing surface 2 Torque on bolts is accomplished in 3 or 4 steps Tighten UNIFORMLY 3 If originally supplied with unit re install the Do Not Reuse Bolts and NACE product tags 16 Table 4 4 Special 6 000 PSI NACE Bolt Torque Ratinos 6 000 PSI NACE Units Bolts available from Canada Only 6000 PSI 41 4 MPa Fastener ue with Hex Nuts SPECIAL NOTES 1 Lubricants Molykote G paste Teflon base pipe dope graphite base grease or similar lubricants Lube first 2 threads only Do not lube bearing surface Torque on bolts is accomplished in 3 or 4 steps Tighten UNIFORMLY For DP units marked as 1850 PSI 12 7 MPa and 1500 PSI 10 3 MPa originally supplied with 12 point head bolts Cameron has re rated these lower pressure DPUs to 2000 PSI 13 7 MPa Apply the parts and use the torque values for the 2000 PSI model Table 4 3 For DP units marked as 1500 PSI 10 3 MPa originally supplied with 6 point head bolts use a standard B7 alloy s
3. CAMERON Measurement Systems Barton MODEL 199 DIFFERENTIAL PRESSURE UNIT DPU Standard and NACE Service User Manual Manual No 9A 10030 Rev 01 January 2008 CONTENTS Section 1 Introduction u u seceatsocecqsemnaseseoceaacecazsareneweeanencmnens Page 3 Section 2 Theory of Operation Page 5 Section 3 Installation Operation Page 9 Section 4 Maintenance Adjustment amp Calibration Page 13 4 1 Tools Required for Maintenance and Calibration Page 13 4 2 DPU Inspection and Cleaning Page 13 4 3 Calibration Se ri aiene EEEa E ERAN Page 18 4 4 Torque Tube Rotation Check Replacement Units Page 18 S Kanpe Chia uuu uu u u EE Page 19 4 6 Setting Bellows Travel Page 22 4 7 Bellows Unit Assembly BUA Replacemernt Page 22 4 8 Attaching Drive Arm to Torque Tube Page 24 4 9 Drive Arm Tightness Te st Page 24 4 10 Adjusting Pulsation Dampener Page 25 4 11 Troubleshooting uu uu UU uu uuuuuasssskayskhasasqaspaaspunaasa Page 25 Section 5 Parts Drawine List Page 27 Section 6 Outline Dimension Dra
4. F minimum for water filled units Pressure Do not subject the DPU to operating pressures in excess of the working pressure rating stamped on the unit or attached dataplate Corrosion Do not subject the DPU to incompatible process media Sealed Components Do not loosen or remove the torque tube gland nut the drive arm hole plug or the torque tube housing from the centerplate To do so will cause loss of bellows fill fluid and render the unit moperable Vibration Do not subject the DPU to severe mechanical shock Shock Do not subject the DPU to hydraulic shock Pulsation Do not subject the DPU to severe pulsation SECTION 1 INTRODUCTION 1 1 General The Barton Model 199 Differential Pressure Unit DPU see Figure 1 1 isa mechanical device which accurately measures differential pressure relative to a gas or liquid flowing through a process system or to the level of a liquid con tained in a process vessel For process flow measurements the DPU is connected across a primary device a venturi an orifice plate or a flow tube located in the process system For liquid level measurements the DPU may be connected in a variety of ways to measure the difference in pressure caused by variations in the level of the liquid in the process vessel 1 2 Product Description The Model 199 DPU is a dual bellows assembly enclosed within pressure housings The dual bellows assembly consists of two opposing internally connect
5. are presented in the separate DPU Manual Figure 5 1 199 DPU Parts Drawing 27 WARNING NACE SERVICE HAZARDOUS GAS AND PRESSURE HAZARD IN NACE QUALIFIED SERVICE USE ONLY NACE QUALIFIED REPLACEMENT PARTS FOR HOUSINGS BOLTS AND BUA FOR NACE BOLT PART NUMBERS REFER TO TABLES 4 3 amp 4 4 ANY DEVIATION FROM USE OF QUALIFIED NACE PARTS IN NACE SERVICE WILL VOID THE INSTRUMENT DPU NACE RATING s Table 5 1 199 Parts List PER ITEM DESCRIPTION PART NO UNIT 1 BELLOWS UNIT ASSEMBLY BUA SPECIFY POST CALIBRATION SPRING RETAINER Kg FOR 3 3 4 BELLOWS 0199 0019C 4 ROD SPRING PUSH 0199 0049C SCREW RETAINER 6 32 x 5 16 0111 00493 8 SPRING ASSEMBLY CALIBRATION TENSION FOR 2 1 8 BELLOWS i 6 NUT LOCK SPRING ADJUST 0199 0144C PLUG PIPE 1 4 NPT STEEL 0199 0191C 8 PLUG PIPE 1 2 NPT STEEL 0199 0192C A R BOLT HOUSING STANDARD UNITS STAINLESS STEEL 1000 PSI UNITS 0199 1345C STEEL 2500 3000 4500 PSI UNITS 0199 0085C STUD ALLOY STEEL 1 2 20 X 7 FOR 6000 PSI UNITS NOT SHOWN 0199 1001C BOLT FOR 6000 PSI UNITS NOT SHOWN 0199 1346C SCREW PIPE MOUNT ADAPTER 3 8 16 X 3 4 0210 00124 SCREW SCH CAP STEEL 3 8 16 X 1 1 2 LG 0220 11024 SCREW 3 8 16 X 5 8 STEEL FOR ITEM 13 0310 0013J ADAPTER PIPE MOUNTING 0199 0988C 1 14 NUT SPRING RETAINER HEX 6 32 hal SM PATTERN SST FOR 3 3 4 BELLOWS las ce 15 ASSEMBLY RANGE SPRING fad F
6. center plate B Bellows The bellows of the Model 199 DPU are available in the various materials and sizes refer to Table 1 1 to accommodate the various safe working pressure ratings The DPU has two bellows One end of each bellows is sealed The open end of each bellows is attached and sealed to a side of the center plate one bellows on each side The bellows and center plate are filled with fill liquid via the drive arm hole plug An opening through the center plate provides a passageway for the transfer of fill liquid between the two bellows This opening also allows the bellows to be connected internally by a valve stem Range Springs The range of the dual bellows type DPU is determined by the force required to move the bellows through their normal range of travel The range springs which are available in various ranges refer to Table 1 1 act with the bellows and torque tube to balance the differential pressure applied to the unit The number of springs used and their spring rate depends on the individual differential pressure range requirement Drive Arm Hole Plug DO NOT LOOSEN Retainer Torque Tube Gland Nut s Pa DO NOT LOOSEN jr J ange Range Nut Springs 2 1 8 Bellows Unit Assembly BUA Drive Arm Hole Plug DO NOT LOOSEN Torque Tube Gland Nut Spring Post DO NOT LOOSEN Z fae a fj Range Spring x r H a Assembly LN ss Mg i x Ei Pa _ Retainer Nut T
7. externally adjustable pulsation dampener needle valve Restriction of liquid flow reduces the effects of pulsation In applications where pulsation is not a problem the needle valve is set to the fullopen position Blank Page SECTION 3 INSTALLATION OPERATION 3 1 Unpacking The 199 DPU should be inspected at time of unpacking to detect any damage that may have occurred during shipment NOTICE The instrument was checked for accuracy at the factory do not change any of the settings during examination or accuracy will be affected NOTICE For application in critical media requiring special cleaning pro cesses and precautions a polyethylene bag is used to protect the instrument from contamination This protective bag should be removed only under conditions of controlled extreme cleanliness NOTICE Do not locate the instrument near vents or bleed holes that dis charge corrosive vapors or gases 3 2 Mounting A Flush or Panel Mounting Attach the case of the instrument recorder indicator etc to the panel Refer to the Installation and Operation Manual for the specific instrument for the mounting details B Pipe Mounting Refer to the Outline Dimension Drawing in Section 6 for the pipe mount ing diagram The DPU must be mounted approximately level to operate properly 3 3 Piping Standard Practices A All Applications flow and liquid level 1 Shorten the distance between the primary device and the DPU as mu
8. tion before breaking e Slotted 1 4 to 1 3 turn slot in the slotted clamp block should still be open NOTICE For Nuclear Seismic and High Shock Qualified Units perform Drive Arm Tightness Test per para 4 9 4 9 Drive Arm Tightness Test Nuclear Seismic and High Shock Qualified Units Only This procedure tests the drive arm to torque tube attachment for tightness by applying torque developed by the DPU onto a fixed drive arm Care should be taken to apply pressure slowly as torque is being applied to the connection through the torque tube drive shaft and not the torque tube itself With pointer at normal 0 torque tube rotation position max minimum scale position or 0 on a normal 0 to 100 scale unit adjust drive arm stop bracket or use alternate means to prevent pointer from moving stop bracket interferres with drive arm movement Note On reverse acting split range units it will be necessary to pressurize DPU to move pointer to max minimum scale position and on suppressed units it will be necessary to apply pressure to establish a reference point to check for zero shift Pressurize DPU as required to full calibrated scale differential pressure 100 of the full scale range This achieves 8 degrees of torque tube drive shaft equiva lent torque onto the connection Observe shift in the unit zero following DPU depressurization as required and drive arm stop bracket readjusting to allow free movement of dri
9. 007 0 O OA OL O Sd 001 0 0 iSd sSL 0 8LOLO ISIV 1801S pebio 99IA8S 3OVN 104 SLOLO ISIV I8 91S pebioy 918 199 S ss lule1S pebio4 919GE WnulUN y seO o uuuus6 t o uuuuss 8 L Z q o uutuus6 t o uuuuss 8 L Z SAXO 9g I uooSul SAXO g I991S SSajUle S Iei191 elN Buisnoy Apog sobuey dg ajqeyieay suoneouio ds B5uesl eur lelAI dd 661 IPPON T I lqe L SECTION 2 THEORY OF OPERATION 2 1 Basic Components See Fiqure 2 1 Torque Tube Center Plate Shaft a Torque Tube ne BOTONS Range Spring HP Bellows ea Y in HP Over LP Housing range Valve Temperature Compensator LP Overrange Valve HP Housing Housing Bolts Pulsation Damper 4 Damping Valve Plug Valve Stem e Figure 2 1 199 BUA Cutaway A Pressure Housings The two pressure housings of the Model 199 DPU are available in the vari ous safe working pressure ratings defined in Table 1 1 and in the Outline Dimensional Drawings seen in Section 6 DRAWINGS Each pressure housing has two tapped connection ports one port is located in the top of the housing the other port is located in the bottom of the housing The pressure housings may be rotated 180 degrees to facilitate connection at the top of the housing for draining when used in gas service or at the bottom to provide venting when used in liquid service The housings enclose the bellows on each side of the
10. 9 3 SIDE VIEW PIPE MOUNTING PIPE MOUNTING BKT ma sail alee BE 44 5 MAT L ALUMINUM NON THREADED FOR 1 1 2 OR 2 INCH PIPE Figure 6 1 199 DPU Dimension Drawing Part 1 of 2 30 tim1 61 1 4 6 41 See Note 1 SIDE VIEW HALL AOUNTING Figure 6 1 199 DPU Dimension Drawing Part 2 of 2 Table 6 1 199 DPU Dimensions PRESSURE PRESSURE HOUSING CONNECTION DIM A DIM B DIM C RATING ane INCHES PSI MPa HOTTON a 1 000 1 2 NPT 1 4NPT 6 5 8 2 2 9 64 6 9 COST ALUM 20018 Note 1 Note 1 168 3 50 8 54 4 NACE x FORGED ST AISIC1018 1 2NPT 1 4 NPT 2 2 9 64 1 3 8 For NACE Service Note 1 Note 1 177 8 50 8 54 4 2 500 1 2 NPT 1 4 NPT 2 2 9 64 17 2 FORGED ST AISIC1018 Noel Note 1 177 8 0 8 644 2 2 2 4 500 1 2 NPT 1 4 NPT 2 0 64 31 0 FORGED ALLOY SMe Noted Naet n78 soe 544 FORGED ALLOY ST 4142 L 2 soor FORGED STNL ST 17 4PH Nesa waa 177 8 60 8 60 8 i FORGED ALLOY ST 4142 1 2 NPT 1 4NPT 2 2 9 64 FORGED STNL ST 17 4 PH Note 1 Note 1 177 8 50 8 54 4 Note 1 Can be reversed when ordered or can be rotated 180 in the field Note 2 Suitable for use with Aminko fittings American Inst Co Silver Springs MD or equiv Note 3 All Standard pipe fittings furnished by customer Metric conversions are approximate 12 12 12 12 3 o 7 8 o 7 177 8 i 3 000 1 2 NP
11. BRATION 4 1 Tools Required for Maintenance and Calibration A calibration tool kit P N 0202 1005B containing the necessary tools is avail able from the factory The following tools are required for maintenance and calibration of the DPU Table 4 1 Tools 1 2 Open end wrench Pushrod bellows cup connection 1 2 12 point socket Housing bolt 6 000 PSI units Modified Box Open ended Wrench Kickoff spring lock nut 7 16 4 2 DPU Inspection and Cleaning WARNING A High pressure Gas Installations with pressures greater than 200 psig HIGH PRESSURE GAS HAZARD ON DISASSEMBLY OF THE DPU TO PREVENT POSSIBLE SEVERE PERSONAL INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO THE RELEASE OF INTERNAL PRESSURE PERFORM THE PRESSURE CHECK PROCEDURE THAT FOLLOWS Step A BEFORE REMOVING THE DPU HOUSING BOLTS NOTICE If accumulation of solids or semi solids is extensive remove the housings carefully to prevent damaging the bellows WARNING Housing Bolts DO NOT REUSE HOUSING BOLTS IF BOLTS ARE DISTURBED REPLACE WITH NEW BOLTS PER TABLE 4 2 STANDARD or TABLES 4 3 4 4 NACE REUSE OF HOUSING BOLTS ESPECIALLY IN CRITICAL APPLICATIONS LIKE HYDROGEN SULFIDE AND SALT WATER EXPOSURES CAN RESULT IN SEVERE INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO BOLT FAILURE 13 4 2 DPU Inspection and Cleaning Cont A Pressure Check Procedure WARNING N FAILURE TO PERFORM THIS PROCEDURE CAN RESULT IN SEVE
12. OR 3 3 4 BELLOWS eer SPACER INDICATOR BRACKET 0199 0006C 17 SCREW INDICATOR BRACKET 1 i SOC FLAT 3 8 16 X7 8 ST Cee Ki BRACKET SPECIFY 19 SCREW INDICATOR BRACKET HEX WASHER 2 k HD 3 8 X 1 1 8 B 20 SCREW RECORDER BRACKET HEX WASHER 1 HD 3 8 16 X 1 2 28 Table 5 1 199 Parts List Continued PER ITEM DESCRIPTION PART NO UNIT O RING 2 127 NITRILE N3 0001 1178R 1 GASKET TORQUE TUBE 0199 0209C progres L NOT USED 24 SCREW RECORDER BRACKET HEX WASHER HD 3 8 16 X 5 8 0002 0033T rower 25 GASKET PRESSURE HOUSING 1000 PSI ALUMINUM UNITS a eer 2500 3000 4500 PSI STEEL UNITS eo inc 1000 3000 6000 PSI SST amp MONEL UNITS HOUSING PRESSURE SPECIFY 27 WASHER LOCK 3 8 1 Lal USED WITH ITEMS 10 AND 11 al aha EE NOT USED F E 29 NUT 1 2 20 6000 3000 PSI MONEL UNITS A R USED WITH ITEM 9 0199 1002C ka 30 PLUG DAMPENER VALVE NOT SHOWN haa BD HD 1 4 28 X 1 4 SST 0199 0036C gt NOT USED F E WRENCH RANGE SPRING ADJUSTMENT 0199 0142C KEYS SET OF HEX NOT SHOWN 0016 0013T NOTES INDICATES RECOMMENDED SPARE PART A R INDICATES AS REQUIRED WHEN ORDERING PARTS SPECIFY INSTRUMENT SERIAL NUMBER FOR NACE SPECIFIC PART NUMBERS REFER TO TABLES 4 3 AND 4 4 29 SECTION 6 OUTLINE DIMENSION DRAWINGS T 17 2 198 5 FULSATION DAHPENER LOW PRESS HIGH PRESS HOUSING HOUSING REAR VIEW MTG BRACKET NOT SHOWN 5 i74 13
13. RE INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO THE RELEASE OF INTERNAL PRESSURE NOTICE This procedure should be performed before removing the DPU housing bolts if the DPU has been installed in gas applications with working pressures greater than 200 psig 1 Back off all housing bolts 4 turns 2 Check for internal pressure by attempting to move the housing in and out along the bolts a Ifthe housing moves freely no pressure is present servicing or repair may continue b If the housing does not move freely the bellows may be pressurized and is potentially hazardous if further disassembled Tighten the bolts and return the unit to the factory for repair Tag the unit and specify Gas in Bellows B Inspection and Cleaning Procedure Instruments used in services where solids or semi solids may accumulate inside the pressure housings require periodic inspection and cleaning as follows 1 Remove the DPU from service and remove the pressure housings 2 Carefully remove the pressure housings from the bellows unit assembly NOTICE If the accumulation of material inside the housing is extensive rapid removal of the housing may damage the bellows convolutions 3 Remove the accumulation from between the bellows convolutions and from the inside of the housings Use a solvent if possible Do not use a sharp instrument to clean between convolutions 4 Assure that there are no broken range springs 5 Replace the housing
14. T 1 4 NPT 7 2 9 64 QO 7 8 QO 7 8 7 8 31 Product Warrantv A Warrantv Cameron International Corporation Cameron warrants that at the time of ship ment the products manufactured by Cameron and sold hereunder will be free from defects in material and workmanship and will conform to the specifications furnished by or approved by Cameron B Warranty Adjustment 1 If any defect within this warranty appears Buyer shall notify Cameron immedi ately 2 Cameron agrees to repair or furnish a replacement for but not install any prod uct which within one 1 year from the date of shipment by Cameron shall upon test and examination by Cameron prove defective within the above warranty 3 No product will be accepted for return or replacement without the written authorization of Cameron Upon such authorization and in accordance with instructions by Cameron the product will be returned shipping charges prepaid by Buyer Replacements made under this warranty will be shipped prepaid C Exclusions from Warranty 1 THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER EXPRESSED OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE 2 Components manufactured by any supplier other than Cameron shall bear only the warranty made by the manufacturer of that product and Cameron assumes no responsibility for the performance or reliability of th
15. The calibration range of the DPU was carefully set at the factory The following procedure maintains the original factory bellows travel setting while the range spring change is performed This procedure must be strictly followed while changing the range spring assembly or altering the adjustment To replace the range spring assembly with either a new assembly of the same range or one with a different range value proceed as follows this procedure as sumes that the DPU is either connected to an indicating instrument or fitted with a scale and pointer to measure torque tube shaft movement A 2 1 8 inch Dia Bellows 1 A 3 4 Remove the D PU from service Remove the pressure housing bolts and the low pressure housing With the pointer at zero remove the spring retainer screw retainer springs and the range spring assembly NOTE The pointer will shift from zero This is a normal action and the pointer should not be readjusted at this point Install the new range spring assembly onto the push rod and replace the spring retainer screw Continued on next page 19 A C 2 1 8 inch Dia Bellows Cont 5 If the pointer is set above zero rotate the spring adjustment clockwise until the pointer is set at zero If the pointer is below zero rotate the spring adjustment conterclockwise until the pointer is set at zero 6 Replace and tighten the lock nut If the pointer shifts from zero loosen the lock nut and reset t
16. acement units a DPU should be checked for proper torque tube rotation per the following procedure 1 Mount DPU on a pipe stand and connect to a standard pressure source 2 Adapt a scale graduated in degrees to the torque tube housing 3 Adapt a pointer to the exposed end of the torque tube shaft 4 Apply 100 DP to the high pressure HP housing fo the DPU The pointer should indicate 8 degrees of travel 4 5 Range Chanqe Changing the range of the Model 199 DPU requires replacing the bellows unit assembly with a unit of the desired range see para 4 7 Bellows Unit Assembly BUA Replacement WARNING High pressure Gas Installations with pressures greater than 200 psig HIGH PRESSURE GAS HAZARD ON DISASSEMBLY OF THE DPU TO PREVENT POSSIBLE SEVERE PERSONAL INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO THE RELEASE OF INTERNAL PRESSURE PERFORM THE PRESSURE CHECK PROCEDURE IN PARA 4 2 Step A BEFORE REMOVING THE DPU HOUSING BOLTS NOTICE If accumulation of solids or semi solids is extensive remove the housings carefully to prevent damaging the bellows WARNING A Housing Bolts DO NOT REUSE HOUSING BOLTS IF BOLTS ARE DISTURBED REPLACE WITH NEW BOLTS PER TABLE 4 2 STANDARD or TABLES 4 3 4 4 NACE REUSE OF HOUSING BOLTS ESPECIALLY IN CRITICAL APPLICATIONS LIKE HYDROGEN SULFIDE AND SALT WATER EXPOSURES CAN RESULT IN SEVERE INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO BOLT FAILURE NOTICE
17. and insert and start only the pressure housing bolts 8 Attach the case mounting bracket 18 to the replacement assembly using three mounting bracket screws 9 Indicators only Attach the pipe mounting adapter bracket 13 using three screws 10 Support the DPU and tighten and torque the pressure housing bolts to the specifications listed in Tables 4 2 through 4 4 Refer to Housing Bolt WARNING para 4 7 page 22 11 Attach the case assembly using four case retaining screws 12 Attach drive arm and linkage 13 Tighten drive arm to torque tube per para 4 8 14 Replace any instrument components that were removed refer to the COMPONENT REMOVAL NOTICE above 15 Calibrate the instrument before returning it to service 23 4 8 Attaching Drive Arm to Torque Tube 03 approx LINK SINTERED VE CLAMP BLOCK B d LINK SLOTIED lt CLAMP BLOCK 332 ALLEN SHAFT WRENCH CLAMP SCREW 1 8 WRENCH 0163 0044C CLAMP SHAFT SCREW TO TIGHTEN Figure 4 4 Drive Arm to Torque Tube Connection 1 Slip drive arm over torque tube shaft clear end of torque tube housing by approximately 0 030 inches before securing to prevent interference 2 To tighten the drive arm assembly onto the torque tube shaft a Supporting block and shaft tighten clamp screw until snug to shaft b Still supporting block shaft tighten clamp screw an additional e Sintered 1 3 to 1 2 turn screw can normally turn one full revolu
18. ch as possible Distances exceeding 100 feet are not recommended For distances up to 50 feet use 1 4 inch or 3 8 inch pipe or tubing For runs of 50 to 100 feet use 1 2 inch pipe or tubing The recom mended limitation does not apply if an air purge or blow back system is used 2 Slope all piping at least one inch per linear foot to avoid liquid or gas entrapment 3 Provide two feet of uninsulated piping between the DPU and the pri mary device for each 100 F 37 8 C in excess of 200 F 93 3 C 4 Assure that the temperature of the DPU never exceeds 180 F 82 C When steam tracing is necessary the steam pressure should not exceed five pounds per square inch and insulation should not be used If pressure must exceed five pounds per square inch limit the length of tubing around the DPU to two turns and do not insulate 5 Install a suitable pulsation dampening device upstream of the DPU Where severe pulsation is present the accuracy of the flow measure ment will be affected 6 Mount the DPU on a solid support to minimize vibration Tighten all points using a suitable compound leaks in piping can cause measure ment errors 3 3 Piping Standard Practices Cont 7 Rotate the housing as necessary to place the connection in the proper position The DPU has connections in the pressure housings to accom modate various pipe sizes refer to Section 6 Drawings 8 Install a valve manifold connecting the DPU and t
19. e unit as a whole 3 In no event shall Cameron be liable for indirect incidental or consequential dam ages nor shall the liability of Cameron arising in connection with any products sold hereunder whether such liability arises from a claim based on contract warranty tort or otherwise exceed the actual amount paid by Buyer to Cameron for the products delivered hereunder 4 The warranty does not extend to any product manufactured by Cameron which has been subjected to misuse neglect accident improper installation or to use in violation of instructions furnished by Cameron 5 The warranty does not extend to or apply to any unit which has been repaired or altered at any place other than at Cameron s factory or service locations by persons not expressly approved by Cameron Product Brand Barton is a registered trademark of Cameron International Corporation Cameron MEASUREMENT SYSTEMS Formerly NuFlo Measurement Systems Barton Instrument Systems e Caldon Inc HOUSTON 281 582 9500 NORTH 1 800 654 3760 HEAD OFFICE AMERICA ms us c a m com ASIA 603 2287 1039 EUROPE 44 1243 826741 PACIFIC f _ MIDDLE EAST ms asiapacific c a m com amp AFRICA ms uk c a m com USA e CANADA UK e SCOTLAND e CHINA UAE ALGERIA e MALAYSIA SINGAPORE www c a m com flo CAMERON
20. ed liq uid filled bellows a center plate range springs overrange valves Torque Tube and a torque tube assembly Shaft HP Housing LP Housing Venting Connection The pressure housings are con nected by Pipe or tubing to the primary device located in the sys Mounting tem piping Variations in differen Bracket tial pressure within the pressure housings cause the bellows to expand or contract in a linear direction towards the side having the lowest pressure Pressure Connection The linear movement of the bellows is converted into angular rotation when transmitted to the torque tube shaft by the drive arm and this mechanical mo tion actuates the mechanism of the process monitoring instrument The process monitoring instrument that is connected to the torque tube as sembly may be an indicator a switch a transmitter a recorder or other process control device 1 3 Specifications Torque Tube Rotation full scale DP 8 10 Torque Tube Material Beryllium Copper BeCu Temperature Limits 40 F C to 180 F 82 C Maximum Non linearity 0 10 w c to 0 400 w c 0 25 mbar to 0 993 mbar 0 5 of full scale with appropriate linkage 0 401 w c to 0 100 psi 0 996 mbar to 0 6 9 bar 0 75 of full scale with appropriate linkage Repeatability
21. essure to the high pressure side of the DPU and repeat the clearance check and adjustment of step 9 Release all pressure from the instrument and replace the low pressure hous ing Use new gaskets Replace the housing bolts Use the torque values listed in Tables 4 2 through 4 4 Refer to Housing Bolt WARNING para 4 2 page 13 4 6 Setting Bellows Travel The travel of the DPU bellows must be adjusted if one of the following occurs 1 Z 3 4 The range spring assembly is removed without following the procedure Broken range springs are replaced The indicator pointer has excessive overtravel The indicator pointer has excessive undertravel To set the bellows travel requires that the DPU be attached to the actuated instrument and connected to a test pressure source The procedure for this adjustment is presented in the manual of the actuated instrument 4 7 Bellows Unit Assembly BUA Replacement See Figure 2 1 22 WARNING High pressure Gas Installations with pressures greater than 200 psig HIGH PRESSURE GAS HAZARD ON DISASSEMBLY OF THE DPU TO PREVENT POSSIBLE SEVERE PERSONAL INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO THE RELEASE OF INTERNAL PRESSURE PERFORM THE PRESSURE CHECK PROCEDURE IN PARA 4 2 Step A BEFORE REMOVING THE DPU HOUSING BOLTS NOTICE If accumulation of solids or semi solids is extensive remove the housings carefully to prevent damaging the bellows WARNING A Housing Bolt
22. he pointer as in step 5 Tighten the lock nut 7 Replace the low pressure housing and install NEW bolts new gaskets are recommended Use the torque values listed in Tables 4 2 through 4 4 Refer to Housing Bolt WARNING para 4 5 page 19 8 Calibrate in accordance with the manual for the actuated instrument 3 3 4 inch Dia Bellows Without Kickoff Spring gt 50 w c 1 Remove the instrument from service 2 Remove the pressure housing bolts and the low pressure housing 3 With the pointer set at zero remove the lock nut retainer nuts and the range spring assembly To remove the range spring assembly rotate the assembly counterclockwise while pulling outward on the assembly NOTE The pointer will shift from zero This is a normal action and the pointer should not be readjusted at this point 4 Thread the new assembly onto the push rod and align the holes in the range spring assembly with the spring posts Replace and tighten the retainer nuts 5 Using a spanner wrench rotate the spring adjustment until the pointer is set at exact zero Replace and tighten the lock nut The pointer must remain at thezerosetting If the pointer shifts from zero loosen the lock nut and repeat this step 6 Replace the low pressure housing and bolts new gaskets are recom mended Use the toque values listed in Tables 4 2 through 4 4 Refer to Housing Bolt WARNING para 4 5 page 19 7 Calibrate in accordance with the manual for the actuated i
23. he source of differen tial pressure to facilitate operation and checking of the DPU 9 Locate all shutoff valves and bypass valves to be readily accessible from the front of the instrument Locate block valves at the source of dif ferential pressure Flow Applications Assure that the DPU high pressure housing is connected to the upstream tap of the primary device NOTE To prevent overheating the DPU during blowdown the operator should monitor the temperature by placing his hands on the pipe between the DPU and the manifold pipe containing the vent valves Liquid Level Applications The process media may be used as a reference leg seal fluid when it is of a type that will condense in the reference leg under all conditions If the process or process media characteristics are such that the above con ditions cannot be met a special reference leg seal fluid will be required The special seal fluid media characteristics are such that the above conditions cannot be met a special reference leg seal fluid will be required The special seal fluid must not be volatile and must not be miscible with the process media Also the difference in the densities of the special seal fluid and the process media will require compensation in calculating the differential pres sure range of the DPU WARNING A EXPLOSION HAZARD ORGANIC COMPOUNDS OIL GREASE DIRT OR SCALE OF ANY KIND CANNOT BE TOLERATED IN AN OXYGEN INSTALLATION 3 4 General Star
24. nce is needed for the wrench during this operation note the position of the spud measure with a scale or count threads to the end of the push rod and move the spud for the required clearance After the lock nut is tightened return the spud to the original position kai M LOCK NUT KICK OFF SPRING w u SPACERS Pe a sl y P O NO AND SIZE OF SPRINGS AS SPECIFIED WASHER PUSH ROD 005 NOTE OBTAIN goq DIM BY ADDING SPACERS RETAINER NUT Figure 4 2 Kickoff Spring Assembly NOTE The lock nut requires a modified 7 16 12 point box wrench for tight ening Figure 4 3 TAG BOX OPEN END Figure 4 3 Wrench Modification 9 Check the back clearance between the kickoff spring and the slot Use a wire feeler gage or comparable measuring device The clearance will vary between each individual slot but must be at least 0 005 inch for any one slot to prevent interference with instrument zero Add or remove washers as required to obtain the proper clearance Tighten the lock nut securely 10 Install the jam nut and lock the spud to the push rod Hold with pliers If the spud was moved in step 9 return the spud to the proper position before tightening the jam nut 21 11 12 15 14 3 3 4 inch Dia Bellows w Kickoff Spring Cont Apply 100 percent negative pressure to the high pressure side of the DPU and repeat the clearance check and adjustment of step 9 Apply 100 percent positive pr
25. nstrument 3 3 4 inch Dia Bellows w Kickoff Spring see Figure 4 2 NOTE The kickoff spring is supplied with the 0 40 w c and lower range DPUs as standard equipment It is optional with 0 50 w c DPUs Also referred to as the anti stick spring 1 2 Se 20 Remove the instrument from service Set the pointer or pen at zero using the instrument zero adjustment Remove the pressure housing bolts and remove the low pressure housing With the pointer set at zero remove the lock nut four spring retainer nuts washer and lock nut and range spring assembly NOTE The pointer will shift from zero This is a normal action and the pointer should not be readjusted at this time Install the range spring assembly using a 1 2 inch open ended wrench to connect the push rod to the low pressure bellows cup NOTE The range spring assembly consists of the range springs kickoff spring assembly and the push rod The assembly is furnished as a complete and assembled unit 3 3 4 inch Dia Bellows w Kickoff Spring Cont see Figure 4 2 Position range spring assembly over retainer posts and replace retainer nuts Insert the tubing between the range springs and tighten inboard lock nut Zero the pointer by adjusting the spud on the push rod Be sure that the kickoff spring is not engaged during this operation 8 Position the kickoff spring to prevent interference with the coil springs and tighten the kickoff spring lock nut If cleara
26. orque ea E Push Rod Tube y Shaft odk Springs Spring Nut End Cup 3 3 4 Bellows Unit Assembly BUA Figure 2 2 Bellows Unit Assemblies BUAs D Torque Tube Assemblv Needle Beaing Center Plate O Ring Seal Weld Torque Tube Lock Nut Torque Tube Torque Tube Shaft O Rotation rive Arm pe P Valve Stem Va Disc Weld 0 200 Bellows Travel Ball Bearing Minature Precision Ball Bearing Valve Stem Figure 2 3 Torque Tube Assembly As illustrated in Figure 2 3 the torque tube assembly consists of a torque tube a torque tube shaft and the supporting members The outboard end of the torque tube shaft is attached to the center plate The torque tube shaft located in the center of the torque tube is welded to the inboard end of the tube Movement of the bellows is transmitted by the drive arm to the torque tube as a rotary motion Since the torque tube is attached to the center plate the tube must twist when subjected to torque The torque tube shaft which is freely supported within the torque tube at its outer end but connected to the torque tube and drive arm at its inner end rotates through the same angle as the differential pressure unit NOTE An extended torque tube is used on electronic transmitters and explosion proof instruments E Pulsation Dampener The pulsation dampener see Figure 2 1 controls the flow of fill liquid between the high and low pressure bellows with an
27. s DO NOT REUSE HOUSING BOLTS IF BOLTS ARE DISTURBED REPLACE WITH NEW BOLTS PER TABLE 4 2 STANDARD or TABLES 4 3 4 4 NACE REUSE OF HOUSING BOLTS ESPECIALLY IN CRITICAL APPLICATIONS LIKE HYDROGEN SULFIDE AND SALT WATER EXPOSURES CAN RESULT IN SEVERE INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO BOLT FAILURE 4 7 Bellows Unit Assembly BUA Replacement Cont See Figure 2 1 COMPONENT REMOVAL NOTICE See separate actuated instrument Manual for particular components that must be removed to gain access to DPU case mounting screws Support DPU during disassembly Do not loosen drive arm hold plug located in the top of the BUA center plate when removing mounting bracket If plug is loosened bellows fill fluid will be lost NOTE The reference designations listed relate to Parts Drawing in Section 5 1 Disconnect the DPU piping and remove the instrument from service 2 Loosen the actuated instrument drive arm and slide off of the torque tube shaft Do not disconnect the instrument linkage 3 Remove the four case retaining screws and remove the case assembly 4 Indicators only Remove the three pipe mounting adapter bracket screws 10 11 and remove the adapter bracket 13 5 Remove the three mounting bracket screws and remove the case mounting bracket 18 6 Remove the pressure housings bolts and pressure housings 26 7 Place the pressure housings 26 on the replacement bellows unit assembly 1
28. s and seals Housing Bolts DO NOT REUSE HOUSING BOLTS IF BOLTS ARE DISTURBED REPLACE WITH NEW BOLTS PER TABLE 4 2 STANDARD or TABLES 4 3 4 4 NACE REUSE OF HOUSING BOLTS ESPECIALLY IN CRITICAL APPLICATIONS LIKE HYDROGEN SULFIDE AND SALT WATER EXPOSURES CAN RESULT IN SEVERE INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO BOLT FAILURE 6 Install NEW pressure housing bolts and set them to the torque values listed in Table 4 2 Standard or Tables 4 3 and 4 4 NACE 14 Table 4 2 Standard Bolt Torque Ratings 1000 Torque Lb Ft Rotation Taian Steer a7e 16x45 6 oise 1345c ves 40 180 zi see v2 19455 6 L085 ve f os 80 ofere sea 218555 forssoosse ve f eo iat Steel 1 2 20x 7 12 0199 1001C Stud 6000 i 180 Steel 1 2 20 24 0199 1002C Note 4 Nut Steel 1 2 20 x 6 12 0199 1346C Bo It 6000 180 FA 1 2 20 12 0199 1002C Note 4 FA NOTES 1 Lubricants Molykote G paste Teflon base pipe dope graphite base grease or similar lubricants Lube first 2 threads only Do not lube bearing surface 2 Torque on bolts is accomplished in 3 or 4 steps Tighten UNIFORMLY 3 Rotation of bolt head is measured after bolt is snug with approximately 5 lb ft torque DO NOT EXCEED THIS ROTATION To tighten bolts with out torque wrench use rotation values 4 Rotation reference for bolt with nut is the sum total of bolt head plus nut or total of 2 nuts
29. teel bolt that is suitable only for applications where the application environment is not deemed to be sour WIth the exception of 0199 0085C bolts apply the parts and use the torque values for the 2000 PSI model Table 4 3 If originally supplied with unit re install the Do Not Reuse Bolts and NACE product tags 17 4 3 Calibration Setup The test equipment required to calibrate the Model 199 DPU when attached to a recorder indicator or switch is shown in Figure 4 1 INSTRUMENT TO BE CALIBRATED TYPICAL SETUP NOTE CHANGE PAHESSURE SLOW LY IN DISCRETE STEPS DO NOT USE A BLEED SYSTEM REGULATOR BLOCK VALVE MANOMETER OR SIMILAR PRESSURE REFERENCE GAGE ACCURATE INDICATOR WITH THE DESIRED RANGE INSTRUMENT TO BE CALIBRATED VENT THE LOW PRESSURE HOUSING OF BOTH INSTRUMENTS TO ATMOSPHERE PORTABLE FLEXIBLE HOSE CONNECT THE HIGH PRESSURE HOUSINGS IN PARALLEL SQUEEZE BULB TO SIMULATE DIFFERENTIAL PRESSURES Figure 4 1 Calibration Setup All Barton instruments using 199 DPU as actuator are calibrated at the factory All DPUs sold as replacement units or as actuators for other applications are checked for accuracy prior to shipment Normally the DPU is calibrated after installation on a specific instrument Refer to the separate instrument manual for specific calibration procedures 4 4 Torque Tube Rotation Check Replacement Units Prior to installation as a repl
30. tup Practice Considerations Observe the following practices when starting up an instrument 1 ZA 10 Always start with the block valves closed Perform a zero check on the instrument as follows NOTICE For gas service it is recommended that zero check be performed with both block valves closed If the gas flow is pulsating there may be a standing wave effect in the process line which can displace the indicator and appear as a zero error a Open the bypass valve s then open one shutoff valve This proce dure equalizes the pressure between both sides of the instrument The instrument should indicate zero b Ifthe instrument does not indicate zero check for gas or liquid entrap ment in the lines or in the DPU depending on the orientation of the piping layout and service 3 4 General Startup Practice Considerations Cont ye Perform a zero check on the instrument as follows Cont c If necessary adjust the pen or pointer by turning the zero adjust on the instrument Check the manifold and piping for leaks as follows a Open the bypass valve s then open one shutoff valve to pressurize the instrument b Close the shutoff valve and the bypass valve Any leakage will be indicated by pen or pointer movement up or down scale NOTE Be careful not to subject the DPU to unnecessary shock or over range pressure during operations 11 12 Blank Page SECTION 4 MAINTENANCE ADJUSTMENT amp CALI
31. ve arm and pointer A downscale counter clockwise shift in zero of greater than 1 2 is indicative of drive arm slippage necessitating further clamp block tightening 24 4 10 Adjusting Pulsation Dampener See Figure 2 1 1 Remove dust cover and insert 1 8 hex key into needle valve 2 Turn valve clockwise to closed position approx 3 turns 3 Back out valve 1 2 turn or as required to reduce pulsations shock pres sures 4 11 Troubleshooting See Table 4 5 and refer to actuated instrument Manual for more information Table 4 5 Troubleshooting Chart Possible Source Probable Cause Corrective Action Low or No Primary Element Orifice installed backwards Replace orifice Indication or Differential or oversized OMCs Flow blocked upstream Clean out run or from run open valve Loss of liquid in reference Refill reference leg leg liquid level Density changes in process Refill reference leg media or reference leg with same density liquid as process media Piping from Pressure tap holes plugged Clean out piping Paman icra Bypass valve open or Close bypass valve s to DPU i leaking or repair leaks Liquids or gases trapped Vent piping in piping Block or shutoff valves Open block or shut closed off valves Piping leaks HP side High flapper setting Align drive arm re calibrate Bellows Unit Housing s filled up with Clean out housing s solids restricting bellows movement Gas trapped liquid ser
32. vice Vent housing s or liquid trapped gas service in housing s HP Housing gasket leaks Replace gasket DPU tampered with Return BUA for repair Mechanism Loose links movements Tighten or replace Out of calibration Corrosion or dirt in mecha Clean or replace nism 25 High Indication Erratic Indication 26 Table 4 5 Troubleshooting Chart Continued Primary Orifice partially restricted Clean out or replace or too small Piping from Primary Element to DPU Bellows Unit Mechanism Primary Piping from Primary Element to DPU Bellows Unit Leak in LP side piping Repair leaks Gas trapped liquid service Vent housing in LP housing or liquid trapped gas service in HP housing LP housing gasket leaks Range spring broken or DPU tampered with repair Loose links or movements Out of calibration Flow pulsating Install dampening device upstream of DPU run Liquid trapped in gas Remove see Startup piping or gas bubble in Procedure Section 3 liquid piping Vapor generator incorrectly Repipe installed Reference leg gassy or See piping instruc liquid vaporizing tions Obstructed bellows travel Clean bellows Gas trapped in DPU HP or Remove see Startup LP housing Procedure Section 3 Linkage dragging or dirty Adjust or clean Pointer dragging on scale Adjust plate SECTION 5 PARTS DRAWING LIST 5 1 General The parts list and parts identification drawing s for the DPU
33. wings Page 30 This manual is for the DPU only Refer to the appropriate separate Instrument manual for information on the instrument being actuated een Before installing this instrument become familiar with the installation instructions in Section 3 and in the separate DPU manual DANGER notes indicate the presence of a hazard which will cause severe personal injury death or substantial property damage if warning is ignored WARNING notes indicate the presence of a hazard which can cause severe personal injury death or substantial property damage if warning is ignored CAUTION notes indicate the presence of a hazard which will or can cause moderate personal injury or property damage if warning is ignored DANGER WARNING and or CAUTION notes that appear on the following pages of this manual should be reviewed before proceeding 10 13 14 19 22 and 28 Important Before installing or operating this instrument review all safety warnings notices contained in the separate Instrument manual that is appropriate for the instrument being actuated PRODUCT WARRANTY STATEMENT The product warranty applicable to this Barton instrument is as stated on the back last page of this manual NOTICE The warranty of this instrument and the associated DPU will be voided if the following limitations are exceeded Temperature Do not subject the DPU to temperatures above 200 F or below 60 F 35
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