RA 29 586/06.98 - Airline Hydraulics
Contents
1. Model 4 WS 2 EM 10 4X B 29 586 06 98 Replaces 05 94 with mechanical feedback associated electronic amplifier card ordered separately K 4246 3 Model 4 WSE 2 EE 10 4X B with electronic feedback and integrated electronics Description Operating curves flow vs load Operating curves flow vs signal Operating curves frequency response barometric feedback Operating curves frequency response mechanical feedback Operating curves frequency response electrical feedback Unit dimensions mechanical feedback Unit dimensions electrical feedback Unit dimensions barometric feedback Unit dimensions sandwich plate for external pilot oil drain Flushing plate flushing instructions External control electronics Note For service manual request RDE 29 586 S For complete parts list request RDE 29 586 E MANNESMANN REXHOTH d Page 10 10 10 11 12 13 14 14 15 15 16 1 16 RA 29 586 06 98 Functional description Valves Model 4 WS 2 E 10 and 4 WSE 2E 10 are electronically operated 2 stage servo valves These valves are primarily used for closed loop control of position force and velocity These valves consist of two stages the 1 stage 2 has a magnetic torque motor 1 and is of flapper nozzle type design The 2 stage 9 ofthe valve has a precision ground 4 way control spool and a feedback system which may be either mechanical electrical or barometric as described below P2. 10 1 30 40 50 70 A 150 Frequency in Hz Amplitude ratio in dB Amplitude ratio in dB Phase lag in degrees Phase lag in degrees Frequency in Hz Signal L Do 25 100 Associated dependency of frequency on operating pressure Associated dependency of frequency on operating pressure 90 Frequency in Hz 90 Frequency in Hz 725 1450 2176 2901 3626 4641 p 1450 2176 2901 3626 4641 50 100 150 200 250 320 50 100 150 200 250 320 Operating pressure in PSI bar Operating pressure in PSI bar Signal DD 0 t 2596 100 Mew 11 16 RA 29 586 06 98 Operating curves measured at v 190 SUS 41 mm s and t 122 F 50 C Model 4 WS 2 EE 10 and 4 WSE 2 EE 10 Electrical feedback system Nominal flow Q 8 GPM 30 L min Nominal flow Q lt 12 GPM 45 L min electrical gain amplification Vp 5 electrical gain amplification Vp 5 Crossover functions Crossover functions 100 Stoke in i Ol e e Stoke in 96 Time in ms Time in ms Operating pressure 580 1015 2031 PSI 40 70 140 bar 3046 PSI 210 bar 4570 PSI 315 bar Frequency response curves operating pressure 2030 PSI 140 bar Vp 5 Frequency response curves operating pressure 2030 PSI 140 bar Vp 5 eo eo KO TO fe cab o o v 2 1 A EAE C lt L C O o O
3. 60 L min the effects of flow saturation must be observed Frequency response curves measured at v 190 SUS 41 mm s and t 122 F 50 C Model 4 WS 2 EB 10 and 4 WSE 2 EB 10 Barometric feedback Nominal flow Q lt 8 0 GPM 30 L min TITO JI pt RRS TN oo SEAN js Amplitude ratio in dB 0 5 7 10 20 30 50 70 100 Frequency in Hz 580 PSI 40 bar 116 MANNESMANN 100 PSI 70 bar o Q D 2 O D O D e o o t C A Amplitude ratio in dB Nominal flow Q gt 12 GPM 45 L min ei 1l LIDLUNSR DEI wap Rw Phase lag in degrees 5 7 10 Frequency in Hz 20 30 50 2030 PSI 77 140 bar __ 8050 PSI 210 bar 4600 PSI 315 bar RA 29 586 06 98 Operating curves measured at v 190 SUS 41 mm s and t 122 F 50 C Model 4 WS 2 EM 10 and 4 WSE 2 EM 10 Mechanical feedback Nominal flow Q lt 8 GPM 30 L min Nominal flow Q lt 12 GPM 45 L min Crossover functions Crossover functions Stroke in 96 Stroke in 96 0 5 10 15 O 510 15 0 5 10 15 0 5 10 15 Time in ms Time in ms Pressure stage 580 PSI 100 PSI 2030 PSI LL 1 9050 PSI _ 74600 PSI 40 bar didi 70 bar 140 bar 210 bar 315 bar Frequency response curves operating pressure 2030 PSI 140 bar Frequency response curves operating pressure 2030 PSI 140 bar EBENEN ee SN P AN UL el LAN ee NN 0 10 20 30 40 50 70 100 150
4. Cable connections 6 1 2 ft 2 m long for valves with separate electronics only each cable 0 44 0 2 Optional however the pilot pressure must be 145 PSI 10 bar before start up 22 to 158 30 to 70 with external electronics 22 to 140 30 to 60 for 4 WSE 2 E 10 with integrated electronics Hydraulic measured at v 149 SUS 32 mm s and t 104 F 40 C Feedback system Operating pressure range PSI bar ports A B P X Return line pressure PSI bar ports T Y Hydraulic fluid Fluid cleanliness Mechanical Electrical V 5 Barometric 145 to 4600 10 to 315 145 to 4600 10 to 315 145 to 4600 10 to 315 note pressure range note pressure range Pressure peaks lt 1450 100 Pressure peaks lt 1450 100 Pressure peaks lt 1450 100 static lt 145 10 static lt 145 10 static lt 145 10 Return line pressure reduces spool stroke Petroleum oil HM HL HLP Phosphate ester fluids HFD R Maximum allowable fluid cleanliness level Class 16 13 according to ISO 4406 Therefore we recommend a filter with a minimum retention rate of B 100 without bypass valve with clogging indicator directly before the valve or as close as possible Fluid temperature range F C Viscosity range SUS mm s Nominal flow Q GPM L min 10 at p 1000 PSI 70 bar Flow in center pos GPM L min control fluid for pilot stage Pilot leakage amp
5. X D eo EQ T VN s lt lt S TNN amp amp o o o o EN X t o 2 Q a 10 50 100 200 300 10 50 100 200 300 Frequency in Hz Frequency in Hz Associated dependency of frequency on operating pressure Associated dependency of frequency on operating pressure 200 N I 150 T 2 2 5 2 100 D D LL LL e e P 50 T 0 145 980 1015 2031 3046 4600 145 580 1000 2030 3051 4600 10 40 70 140 210 315 10 40 70 140 210 315 Operating pressure in PSI bar Operating pressure in PSI bar Signal 5 25 100 12716 yaaa RA 29 586 06 98 Unit dimensions dimensions in inches millimeters Mechanical feedback with separate electronics 0 433 11 2 126 54 Model 4 WS 2 EM 10 4X standard 2 50 8 1 Zero point adjustment remove plug 1 569 37 3 0 26 6 6 6 2 5 mm A F to access the potentio es ve meter to set the zero point 2 1 Plug type MS 3106 E 14 S 2 S to non integrated valve Ordering code RROO 002 460 2 2 Plug type MS 3106 E 14 S 5 S to integrated valve Ordering code RROO 011 921 3 Space required to remove plug 4 Adjustment on both sides for setting the Null point centered position of the valve allen wrench 3 mm A F 0 843 21 4 1 811 46 5 Interchangeable filter element Ls a 10 mm A F 0 83 21 m 0 51 13 part no RROO 306 842 for NBR seals e part no RROO 306 84
6. X2 may be used 16 Sandwich plate with NBR seals ordering code RROO 319 482 FPM seals ordering code RROO 319 483 Valve mounting bolts 4 socket head cap screws 1 4 20 UNC x 3 M6 x 75 tightening torque 7 67 lb ft 10 4 Nm Mounting surface for the sandwich plate 16 19 1 4 BSP plug ordering code RROO 001 973 1 4 BSP 7 12 deep O ring 14 mm x 2 mm O ring 12 x 2 mm ports A B P T O ring 10 82 x 1 78 mm port X 7 0 0004 4 0 in Required surface finish of 0 00400 mm interface when mounting the valve without our subplate Rinax 4 LE External pilot oil drain models and E Sandwich plate 22 is not be used with mechanical feedback or electrical feedback with integrated electronics 22 Sandwich plate included only in valve type 23 For pilot oil feed Model port X3 may be s A ER used instead of port X1 for the oil feed 4WSE2EB 32 Unit dimensions Flushing plate dimensions in inches millimeters Symbol 3 54 90 0 71 18 2 126 54 with NBR seals telek aT Te re Ordering code RROO 308 492 19 O ring 12 x 2 mm ports A B P T 20 O ring 7 x 1 5 mm port X 21 4 socket head cap screws 1 4 20 UNC x 2 M6 x 50 tightening torque 11 4 lb ft 15 5 Nm In order to guarantee the perfect functioning of servo valves the installation must be flushed prior to start up 24 6 0 531 As a guide to the flushing time required the following form
7. spool 9 is shifted and continues to move until control springs 12 flow forces and pressure is again in balance Since the control springs have a linear characteristic the stroke of the control spool 9 within the sleeve 11 is directly proportional to input current from the electronic servo amplifier Valve with separate electronic amplifier Fig 1 1 Mechanical feedback standard with external electronics m She Mafa AN A Ze 1 EDD OD Tiler 10 Fig 2 1 Electrical feedback 15 1 14 2 13 3 12 C crux n oO guild oe Mil TSE m D r gr DAA D De 10 Fig 3 1 Barometrical feedback RA 29 586 06 98 Valve with integrated electronics 1 16 2 3 4 _ o 5 D Fig 1 2 Mechanical feedback 16 15 14 TTT OOT CLLEGE INNA E o wn a i LA T 6 10 9 11 8 Fig 2 2 Electrical feedback standard with integrated electronics 16 DO Dr L ope f y a i a J M Sei Pe Fig 3 2 Barometrical feedback MANNESMANN 3 16 REXROTH RA 29 586 06 98 Ordering code Electrically o
8. with respect to earth ground 0 V Command value at plug connection D positive polarity with respect to plug connection E gives a flow from P to A and B to T Measured output F has a positive signal with regard to earth ground 0 V moma 9 16 RA 29 586 06 98 Operating curves measured at v 190 SUS 41 mm s and t 122 F 50 C Flow vs load function for all feedback systems Tolerance band 10 Note Flows are calculated values is HL oT LT LI Le p E E E NEN a NN PTT ITAL LIENS INL LLIN NL V SSE NANTIN SATS NTT IAIN AN E J E lt j amp 10 G E O Z SEE EAE NIAAA AAA HH oN TINTIAL ENA TINE TENTED KEE IN EAR on O AO N Li TEN PRETTY VT NTN ALN TT TT na Ki IN LIN TTT NT NT RY RTT TT A N AYN EAE A AAA TN LOINLLNLLN NINNN LLL INCCEN ENGINAN ASN e Co INLI TI JN IW JM IN WW NW NV d j Ij INTIL TINI 1 IM LIN ITIN NA ANI S LITIL AE TT LN L LN LINILIN PN INN LL IL ILL 7 10 1520 30 4050 70 100 150200 300 Valve pressure drop p in bar m O E p Valve pressure drop input pressure minus return line pressure minus load induced pressure Tolerance zone for the flow signal function P A B T Fi in 9i 110 OW IN 7o 100 80 60 Zero through break according to spool 40 overlap 20 100 80 60 40 20 gt 40 60 80 100 Typical flow curve yp Command value in 96 With flows of 2 16 GPM
9. 15 bar The pilot pressure should not be less than 6096 of the system pressure order to avoid reduction in the controllability due to flow forces on the valves control spool Electric feedback The pilot pressure should be kept within the pressure range where possible In order to influence the dynamic response of the valve it may be fed with a higher or lower pilot pressure When the input pressure of x 580 PSI 40 bar it is always better to keep pilot pressure at port X equal to the system pressure at port P Symbols simplified Servo valve for separate electronics A B Electrical feedback E Mechanical feedback M A B SIL Fari a b Levit Pl IT Barometric feedback system The pilot pressure can not be higher than the maximum pressure inthe model code designation The nominal flow refers to the mean pressure of the relevant pressure stage and changes with the pressure level Spool overlap The spool overlap given in refers to the control spool stroke of 0 0315 inches 0 8 mm For closed loop control we recommend an overlap close to zero or slightly negative like the E spool overlap Spool overlap A This is the limit of the range for applications inclosed and open loop controls The 0 position flow is much less than for D Spool overlap B Mostly applied at pressures less than 2320 PSI 140 bar Suitable for position force and pressure control in closed loop it requires
10. 3 for FPM seals 0 6 15 6 42 163 S 6 Valve mounting bolts not included a7 4 socket head cap screws 1 4 20 UNC x 2 M6 x 50 tightening torque 7 67 lb ft 10 4 Nm 7 Nameplate 8 Top cover can be rotated 180 9 Pilot stage 1st stage 10 Second stage 11 O ring 12 x 2 mm Ports A B P T 12 O ring 7 x 1 5 mm Port X 13 Optional port X for external pilot oil supply Bore 0 118 to 0 197 inches 3 mm to 5 mm 8 If port X is to be used the sandwich 12 13 0 043 1 0 059 1 5 11 plate must be used This plate must be ordered separately 3 189 81 1 575 40 Warning Mechanical feedback integrated electronics Port X1 is connected to pressure If port X Model 4 WSE 2 EM 10 4X instead of X1 is to be used a sandwich TEE 1 plate order separately see page 15 B 6 69 170 14 Cover with integrated electronics 3 0 0004 4 0 in Required surface finish 0 01 100 mm of interface when 32 mounting the valve Rmax 4 without our subplate zza AIF Across flats 4 41 112 Valve Mounting interface to ISO 4401 5 NFPA T3 5 1 M R1 ceo and ANSI B93 7 D 05 except for port X1 D Subplates e G 66 12 SAE 6 9 16 18 G 534 12 SAE 12 1 1 16 12 G 535 12 SAE 12 1 1 16 12 G 536 12 SAE 16 1 5 16 12 Subplates and valve mounting bolts must be ordered separately see RA 45 054 G 67 412 SAE 8 3 4 16 with port X MANNESMANN 13 16 REXHOTH RA 29 586 06
11. 98 Unit dimensions dimensions in inches millimeters Electrical feedback external electronic control Electrical feedback integral electronics Model 4 WS 2 EE 10 4X Model 4 WSE 2 EE 10 4X max 2 6 65 i S i s 2 1 Plug compatible with Type MS 3106 E 14 5 2 S 3 Spacerequired to remove plug to non integrated valve RROO 002 460 take care with the connecting cable 2 2 Plug compatible with Type MS 3106 E 14 8 5S 4 Setting for hydraulic zero point to non integrated valve feedback RROO 011 921 allen key 3 A F 2 3 Plug compatible with Type MS 3106 E 14 5 6S 15 Locknut 10 A F to integrated electronics RROO 013 159 Barometric feedback external electronic control Barometric feedback integral electronics Model 4 WS 2 EB 10 4X Model 4 WSE 2 EB 10 4X QN LO m o 2 1 Plug compatible with Type MS 3106 E 14 5 2 S to non integrated valve RROO 002 460 2 2 Plug compatible with Type MS 3106 E 14 8 5S to integrated electronics RROO 011 921 4 Setting for hydraulic zero point allen key 3 A F 15 Locknut 10 A F 14716 MANNESMANN RA 29 586 06 98 Unit dimensions Sandwich plates for external pilot oil feed dimensions in inches millimeters External pilot oil supply models and T The servo valve always has port X1 If there is no X1 port on the mounting surface the sandwich plate 16 must be used with external pilot oil feed is required Either port X or
12. RA 29 586 06 98 Electro Hydraulic 4 Way Directional Servo Valve MANNESMANN REXROTH Features Servo valve for the closed loop control of position force and velocity Two stage modular design for easy maintenance 1 stage is a flapper nozzle design Mounts on standard ISO 4401 5 NFPA T3 5 1 M R1 and ANSI B 93 7 D 05 interface with additional X1 port for external piloting For subplates see RA 45 054 Can be used in conjunction with several feedback devices Dry torque motor which is isolated and cannot be contaminated by the fluid May also be used as a 3 way valve 5 different coils available to meet your requirements Valve electronics are available separately standard plug in Euro card design or e integrated into the valve Valve with integrated electronics are adjusted and tested as a unit Table of contents Description Functional description Sectional diagram Ordering code Explanation of ordering code Valve symbols Technical data general Technical data hydraulic Technical data electrical Technical data inductive positional transducer Electrical connections for external electronics Electrical connections for integrated electronics Page NO O ON NOD C101 KR CO National FLUID POWER Association MEMBER Model 4 WS 2 E 10 and 4 WSE 2 E 10 Series 4X 4600 PSI 20 GPM Size 10 D 05 315 bar 75 L min RA K 4242 5
13. a higher degree of damping than with spool D and a greater 0 position flow is only of secondary importance Spool overlap C Suitable for open loop or velocity control Spool overlap D Suitable as a universal overlap for closed loop control of position force and velocity with low O position flow however with lower damping than that of spool B Spool overlap E Suitable for highly accurate applications with a somewhat higher O position flow than with spool D Main applications control of pressure and force in a closed loop Further details to be written in clear text Special requirements should be specified here in clear text After the receipt of an order this will be checked by the factory and the valve code extended by an additional code when required Servo valve with integrated electronics Barometric feedback B MANNESMANN REXHOTH 5 16 RA 29 586 06 98 Technical data For applications outside these parameters please consult us Weight approx Mounting position Ambient temperature range F C 4 WS 2 EM 10 4X 4 WS 2 EE 10 4X with separate electronics 4WS2EB10 4X 4 WSE 2 EM 10 4X 4 WSE 2 EE 10 4X with integrated electronics 4 WSE 2 EB 10 4X Additional items sandwich plate for external piloting model T see page 15 item 16 Sandwich plate for external drain model E see page 15 Flushing plate see page 15
14. and K3 as well as the PID controller are special models and are identified by a VT number when ordering Positive command value at port 30c gives a flow at the servo valve from P to B Positive command value at port 32a gives a flow at the servo valve from P to A vrsaz s x T 32 pin blade connector to DIN 41612 form D S Further details in clear text for installation in Euro card racks and card holders 0 without 15 V voltage regulator Series 10 to 19 1X with 15 V voltage regulator 10 to 19 unchanged technical data and connection allocations Mannesmann Rexroth Corporation Rexroth Hydraulics Div Industrial 2315 City Line Road Bethlehem PA 18017 2131 Tel 610 694 8300 Fax 610 694 8467 Rexroth Hydraulics Div Mobile 1700 Old Mansfield Road Wooster OH 44691 0394 Tel 330 263 3400 Fax 330 263 3333 16 16 MANNESMANN All rights reserved Subject to revision REXROTH Printed in U S A
15. ection if required When current is supplied to the torque motor 1 a magnetic field is generated which changes the position tilts the T bar 15 and therefore also the flapper 13 This movement of the flapper closer to one and farther from the other fixed orifices 3 causes a differential pressure between the control chambers 8 amp 10 which acts on the spool Due to the effects of the pressure differential the control spool 9 and feedback rod 7 are shifted and continue to move until the actual feedback value agrees with the desired input signal value Then the pressure is again equalized on both sides and the control signal is at zero Therefore the stroke of the control spool 9 within the sleeve 11 is directly proportional to input current from the electronic servo amplifier Barometric feedback of the 2 stage Fig 3 1 and 3 2 In the de energized position the control spool in the second stage 9 is pressure balanced and is held in the neutral or centered position by the contol springs 12 When current is supplied to the torque motor 1 a magnetic field is generated which changes the position tilts the T bar 15 and therefore also the flapper 13 This movement of the flapper closer to one and farther from the other fixed orifices 3 causes a differential pressure between the control chambers 8 amp 10 which acts on the spool Due to the effects of the pressure differential the control
16. ed voltage V V adl Roos o o Carrier frequency kHz momen 7 16 RA 29 586 06 98 Plug in connectors For model 4WS2 external electronics Plug in connector must be ordered separately under part no RROO 002 460 For PIN allocation see below and block circuit diagram on page 10 0 79 A F 20 For model 4WSE2EM and 4WSE2EB 104 integrated electronics and model 4WS2EE external electronics inductive feedback Plug in connector must be ordered separately For model 4WSE2EE integrated electronics part no RROO 011 921 part no RROO 013 159 For PIN allocation see below For PIN allocation see below Electrical connections Model 4 WS 2 E 10 valves for external electronics Pilot control 1st stage Positional transducer Plug pin connections Plug pin connections green yellow Electrical connections to the servo valve can be made either in parallel or in series For safety due to the lower inductivity obtained we recommend parallel connection Parallel connection For plug connection connect A to B and C to D For cable connection connect yellow to brown and green to white Series connection For plug connection connect B to C For cable connection connect brown to green An electrical input of A to D for plug connection or yellow lead to white lead for cable connection provides a flow direction in the 2nd stage of P to A and B to T Reversing t
17. he direction of the current reverses flow direction in the 2nd stage to P to B and A to T Warning Connection A at the plug or the white wire in the cable must not be connected due to radio interference effects IN u RA 29 586 06 98 Electrical connections and technical data Model 4 WSE 2E 10 Valves with integrated electronics Models 4 WSE 2 EM 10 and 4 WSE 2 EB 10 mechanical and barometric feedback Supply A e Mes mau c C Command value D 10 mA 10 V D E R 1kQ R 2 50 kQ R E Lo Current A maximum maximum Integrated required at B 100 mA 100 mA electronics plug D E Command value Command value at plug connection D negative polarity with respect to plug connection E gives a flow from P to B and A to T Command value at plug connection D positive polarity with respect to plug connection E gives a flow from P to A and B to T Model 4 WSE 2 EE 10 electrical teedback Measured output Nominal stroke corresponds to 10 V for control spool against 0 V R 4 7 KQ do Supply A 3 J E NE DM C B C Command value D 10 mA 10 V E R 1 kQ R 2 50 kQ I E F F Lo Integrated Current A maximum maximum electronics i required at B 200 mA 200 mA D E plug connection Command value Command value at plug connection D negative polarity with respect to plug connection E gives a flow from P to B and A to T Measured output F has a negative polarity
18. ilot control 1 stage The 1 stage is a pilot valve which is electronically operated by a servo amplifier The flapper nozzle configuration functions like a Hydraulic Amplifier The armature of the torque motor 1 is tilted from the neutral position by an electrical current thereby offsetting the flapper 13 between the two orifices 3 This change in flapper position creates a change in the flow area in relation to the two fixed orifices which therefore causes a differential pressure This controls the spool 9 inthe second stage of the valve The valve can be ordered in conjunction with a separate electronic amplifier card Model 4 WS or it can also be ordered with the electronics integrated into the valve Model 4 WSE depending on what is best for the application Model 4 WS requires separate electronic amplifier Tocontrol this valve an external electronic control servo amplifier is used which amplifies the input signal to a level required for the output signal to the valve Depending on the specific application several types of amplifiers are available Model 4WSE integrated electronics To control this valve a specially tuned electronic control 16 is integrated in the valve under the cover This closed loop control output stage and the oscillator demodulator are molded into the cover The command value can either be a regulated voltage 10 V or a regulated current 10 mA causing the valve spoo
19. l to move MANNESMANN REXROTH 2 16 Mechanical feedback on the 2nd stage Fig 1 1 and 1 2 The control spool in the second stage 9 is physically connected to the torque motor 1 with the mechanical feedback linkage 5 The torque tube 14 centers the armature 15 and the flapper 13 into the neutral centered position when de energized When a current is supplied to the torque motor 1 a magnetic field is generated which changes the position tilts the T bar 15 and therefore also the flapper 13 and feedback spring 5 This movement of the flapper closer to one and farther from the other fixed orifices 3 causes a differential pressure which acts on the spool Due to the effects of the pressure differential the control spool 9 is shifted and continues to move until the pressure is again equalized on both sides Therefore the stroke of the control spool 9 within the sleeve 11 is directly proportional to input current from the electronic servo amplifier Electrical feedback on the 2 stage Fig 2 1 and 2 2 The control spool in the second stage 9 is physically connected to a rod 7 which is able to move in the inductive positional transducer 6 Spool movement is continually monitored and any change is sensed instantaneously Dependant on spool position different value voltage signals are fedback to the associated electronic amplifier for comparison of actual vs desired position and error corr
20. leakage of whole valve 9 4 50 to 176 10 to 80 92 to 1760 20 to 380 preferably 140 to 208 30 to 45 0 53 1 3 2 65 5 3 8 0 12 0 16 0 20 0 2 5 10 20 30 45 60 75 EY 0 21 GPM 0 8 L min Jam PSI 70 bar 0 21 GPM 0 8 L min Dv 0 21 GPM 0 8 L min 0 21 GPM p mun 1015 PSI 70 bar 0 04 Qy 0 8 L min 1015 PSI 70 bar 99 Qn The centered position flow data is valid only without an overriding dither signal it will increase if dither is applied lt 6 pressure stage 40 and 70 Hysteresis with dither optimized Reversal voltage Sensitivity Pressure gain Spool overlap A Spool overlap B E Spool overlap D electrical gain lt 4 pressure stages 140 210 315 lt 1 0 lt 0 4 lt 3 0 0 5 lt 0 2 lt 1 5 gt 50 of p for 1 spool stroke from the hydraulic null point gt 40 of p for 1 spool stroke from the hydraulic null point gt 75 of p for 1 spool stroke from the hydraulic null point 4 p Operating pressure in PSI bar pressure drop across valve in PSI bar 5 The zero flow data is valid without overlapping dither signal Nominal flow in GPM L min IN and increase with the dither part RA 29 586 06 98 Technical Data For applications outside these parameters please consult us Null compensation current lt 5 long term lt 8 lt 10 longterm lt 15 Null offset
21. mating connectors RROO 011 921 Coil no 1 5 mA 500 Ohm per coil 1 order separately Coil no 2 30 mA 40 Ohm per coil Standard 2 mess Ela dide Coil no 3 7 5 mA 200 Ohm per coil 3 pr A ene Coil no 4 20 mA 80 Ohm per coil 4 145 4600 PSI 10 315 bar Coil no 5 50 mA 28 Ohm per coil 5 UU D Valves with integrated electronics 40 145 580 PSI 10 40 bar input signal command value 10 mA 1 KQ 8 70 electric or 080 1000 PSI 40 70 bar command value 10 V gt 50 KQ standard 29 140 barometrical 1000 2030 PSI 70 140 bar Pilot supply and Valve Model 4 WS 2 EM 4 WS 2 EE i clics poc d o A drain 4 WSE 2 EM 4 WS 2 EB T Ut 4 WSE 2 EE 4 WSE2EB Externally piloted externally drained O Internally piloted externally drained O o E Externally piloted internally drained e o T Internally piloted internally drained standard 9 o ET Q available O not available Remarks Sandwich plate X X must be ordered separately see page 16 item 19 Test unit for 4WS2 battery driven Test unit for AWSE integrated electronics Part number for ordering RROO 010 573 Model number VT VET 1 Series 1X data sheet RA 29 685 see data sheet RA 29 680 The test unit is used for the control and function monitoring of Note Test unit only for valves with separate electronics only for coil numbers 1 2 and 3 with electrical feedback only the maximum flow will be sig
22. naled integrated electronic valves INT RA 29 586 06 98 Explanation of ordering code Q Nominal flow The nominal flow is the flow in GPM L min at nominal current signal and at 1000 PSI 70 bar pressure drop 500 PSI 35 bar per control land Other values will necessarily produce a different flow rate The flow tolerance band and also the influences of saturation of flows equal to or above 16 0 GPM 60 L min must be noted see page 10 If required servo valves can be supplied with special operating curves with a subdued form progressive or with special spool overlaps Any special characteristics or parameters must be very clearly specified O Coil electrical control data The control signal must be generated from a current regulated output stage The standard coil for valves with separate electronics is spool number 2 30 mA A40 Q With coil numbers 1 3 4 and 5 the closed loop electronic control servo amplifier must be custom matched with the valve With integrated electronic controls the signal value can be supplied as a voltage signal code 9 or for long distances more than 82 ft 25 m between the computer and the valve as a current signal code 8 Input pressure range to the 15 stage The pilot pressure should be as constant as possible Therefore it is often best to externally pilot the valve via port X Mechanical feedback Pilot pressure 145 to 4600 PSI 10 to 3
23. perated Further details 2 stage 4 way servovalve in clear text with separate M NBR seals electronics 4WS2E suitable for petroleum oils with integrated HM HL HLP electronics 4WSE2E V FPM seals suitable for Mechanical feedback phosphate ester fluids standard for valves with O HFD R separate electronic amplifier M Spool overlap Electrical feedback A 0 5 to 1 5 positive standard for valves with B 0 5 to 1 5 negative integrated electronics E C 3 0 to 5 0 positive Barometric feedback D 0 to 0 5 positive spring centered B E 0 to 0 5 negative Size 10 NFPA ANSI D 05 10 Electrical connections Series 40 to 49 4X Valves with separate electronics 40 to 49 externally interchangeable K8 socket to size 14 S 2 S Flow without mating plug at a pressure drop across the valve of without electric socket p 1000 PSI 70 bar mating connectors RROO 002 460 0 53 GPM 2 L min 2 order separately 1 3 GPM 5 L min 5 Valves with integrated electronics 2 65 GPM 10 L min 10 electrical feedback 5 3 GPM 20 L min 20 K9 socket to size E 14 S 6 S 8 GPM 30 L min 30 without mating plug 12 GPM 45 L min 45 mating connectors RROO 013 159 16 GPM 60 L min 60 order separately 20 GPM 75 L min 75 mechanical or barometric feedback tolerance band for the flow vs signal function K13 socket to size E 14 S 5 S is shown on page 10 o without mating plug Valves with separate electronics
24. starting with a nullpoint corrected valve with alteration of Fluid temperature lt 2168 F 20 C lt 4168 F 20 C Ambient temperature lt 2 68 F 20 C lt 4 68 F 20 C Insulation Exceeds NEMA class B special installation on request Type of signal analog kk kk kk Associated amplifier integrated electronics The amplifier card must be ordered separately With mechanical and barometric feedback use amplifier Model SR 2 see RA 29 980 or amplifier Model VT 1600 see RA 29 716 For electrical feedback use amplifier Model SR 1 see RA 29 979 or amplifier Model VT 1610 see RA 29 717 Please consult us for electronics CN Inductivity at 60 Hz and100 nominal current Series circuit H Parallel circuit H Recommended The amplitude of the dither depends on the hydraulic dither signal f 340 Hz installation maximum limit 10 of nominal current Command value current regulated mA 10 voltage regulated V Input resistance kQ Supply voltage 3 V Act position value for spool setting approx 10 only Model 4WSE2EE 10 Electrical inductive positional transducer for external electronics Electrical measuring system Differential transformer at 100 command value Nominal spool stroke inches mm 0 31 0 8 Sensitivity with 4 5 kHz mV V 1 7 43 carrier frequency in mm Resolution static continuous Fe
25. ula can 13 5 be used j V t Flushing time in minutes 0 276 7 2 5 V Tank contents in gallons liters Q qy Pump flow in GPM L min When refilling more than 10 of the tank contents the flushing process should be repeated Note A directional control valve with mounting pattern according to ISO 4401 5 NFPA ANSI D 05 is better than a flushing plate Such a valve allows the actuator ports and lines to also be flushed Refer to RA 07 700 moma 15 16 RA 29 586 06 98 Control electronics for valve type 4WS2EM and 4WS2EB servo amplifier SR 2 must be ordered separately A external servo amplifier is used to control the valve This changes the analogue input signal command value in such a way that a regulated current control of the servo valve can be effected using the output signal Technical data Supply voltage 22 to 28 V smoothed Height 3 U 128 4 mm Width conductor side 1 HP 5 08 mm Max output current 60 mA Width component side 7 HP Card dimensions Eurocard 100 x 160 mm a DIN 41 494 For applications outside these parameters please consult us Front plate dimensions Detailed information Data sheet RA 29 980 Terminal connections block diagram 1 Servo valve current Input 1 Input 2 Input 3 VL LO Signal voltage for VL LO relays K1 K2 K3 Controller change over UL LO VL LO Supply voltage 22 to 28 V Relays K1
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