Servo directional valve of 4-way design Type 4WS.2E

Transcription

1 RE 9 83/7.3 Replaces:. Servo directional valve of 4-way design Type 4WS.E Nominal size Series X Maximum operating pressures 31 bar Maximum flow 1 L/min H//D 89/97 Overview of contents Contents age Features 1 Ordering details Test unit 3 referred types, symbols 3 Function, section 4 and Technical data 6 and 7 Control electronics 7 lug-in connector, electrical connections 7 and 8 Characteristic curves 9 to 1 Unit dimensions, subplates 16 to 18 ilot oil supply and drain, flushing plate 19 Features H//D 893/97 Type 4WSEED -X/ K31EV Type 4WSEM -X/ K31EV Valve control for closed loop position, force and speed control -stage servo valve with mechanical or mechanical and electrical feedback 1st stage as jet/flapper plate amplifier For subplate mounting, orting pattern to DIN 4 3 form with ports X and Y Subplates to catalogue sheet RE 4 4 (separate order) Dry torque motor, no contamination of the magnetic gap by the pressure fluid Can also be used as a 3-way version Wear-free spool return element Three control variants Control: External electronics in Eurocard or modular format (separate order), see page 7 Or with the electronics integrated into the valve Valve and integrated electronics are adjusted and tested ilot oul supply and drain, internal/external can be changed without dismantiling the valve Spool with flow force compensation ressure chamnbers in the control bush have gap seals, no O-ring wear Filter for 1st stage is externally accessible 3 by osch Rexroth G, Industrial Hydraulics, D Lohr am Main ll rights reserved. No part of this document may be reproduced or stored, processed, duplicated or circulated using electronic systems, in any form or by any means, without the prior written authorisation of osch Rexroth G. In the event of contravention of the above provisions, the contravening party is obliged to pay compensation. 4WS.E 1/ RE 9 83/7.3

2 Ordering details X / K31 E V * Electrically actuated -stage servo valve in a 4-way version For external = 4WSE control electronics With integrated = 4WSEE control electronics Mechanical feedback = M Mechanical and = D electrical feedback (only available with integrated electronics) Nominal size = Series to 9 = X ( to 9: unchanged installation and connection dimensions) Nominal flow With a valve pressure differential p = bar 1 L/min = L/min = L/min = L/min = 4 L/min = 4 L/min = 7 L/min = 7 L/min = 7 Further details 6 in clear text V = FKM seals, suitable for mineral oil (HL, HL) to DIN 1 4 Spool overlap E = to. % negative Electrical connections K31 = Without plug-in connector, with component plug to DIN EN lug-in connector separate order, see page 7 4 Inlet pressure range for the 1st stage = to bar 31 = to 31 bar 3 ilot oil supply and drain = External supply, external drain E = Internal supply, external drain T = External supply, internal drain ET = Internal supply, internal drain (standard) Valves for external control electronics: 11 = Coil no. 11 ( m / 8 Ω per coil) Valves with integrated control electronics: Control: Com. value ct. value (only provided with 4WSEED ) 9= ± V ± V 13 = ± m ± m 1 Nominal flow The nominal flow refers to a % command value signal at a valve pressure differential of bar (3 bar per control land). This valve pressure differential is to be considered as a reference value. Other values cause a change to the flow. possible nominal flow tolerance of ± % (see flow signal function on page 9) must be taken into consideration. Electrical control data Valves for external control electronics: The control signal has to be generated by a current regulated output stage. For servo amplifiers see page 7. Valves with integrated control electronics: For valves with integrated control electronics the command value can be a voltage (ordering code 9 ) or where there is extensive cabling (> m between the control and valve) as a current (ordering code 13 ). 3 ilot oil Care should be taken to ensure that the pilot oil supply pressure is as constant as possible. It is therefore often advantageous to provide an external pilot control via port X. To positively influence the dynamics, the valve can be operated with a higher pressure at port X than at port. orts X and Y are also pressurised with internal pilot oil supply. 4 Inlet pressure range The system pressure should be held as constant as possible. ilot pressure range: to bar or to 31 bar With reference to the dynamics the frequency relationship within the permissible pressure range has to be taken into account. Spool overlap The spool overlap given in % relates to the nominal stroke of the control spool. Further spool overlaps are available on request! 6 Seal materials If a different seal material is required please consult us! 7 Further details in clear text Here special requirements should be stated in clear text. Following the receipt of an order these requirements will be checked at the factory and valve code supplemented with an additional number. RE 9 64/ /7.3 / 4WS.E

3 Test unit Test unit (battery operated, optionally with a power supply) to catalogue sheet RE ttention: Only for valves with external control electronics Test unit for proportional and servo valves with integrated control electronics Type VT-VET-1, series 1X to catalogue sheet RE The test unit is used for the control and for functional testing of proportional and servo valves with integrated electronics. It is suitable for testing valves with an operating voltage of ± 1 V or 4 V. The following modes of operation are possible: External operation passing on the operating voltage and command values from the control cabinet to the valve Internal/external operation command value via the test unit; operating voltage from the control cabinet Internal operation operating voltage via a separate power supply; command value via the test unit Command values via the NC socket optional operational voltage referred types (readily available) Valves for external control electronics, mechanical feedback Material No. Type 4WSEM R7837 4WSEM -X/11ET31K31EV R9618 4WSEM -X/11ET31K31EV R97 4WSEM -X/11ET31K31EV R9498 4WSEM -X/11ET31K31EV R997 4WSEM -X/411ET31K31EV R WSEM -X/11ET31K31EV R919 4WSEM -X/711ET31K31EV R91 4WSEM -X/11ET31K31EV Valves with integrated control electronics, mechanical feedback Material No. R618 R616 R9466 R94987 R94988 R R94989 R996 Type 4WSEEM 4WSEEM -X/9ET31K31EV 4WSEEM -X/9ET31K31EV 4WSEEM -X/9ET31K31EV 4WSEEM -X/9ET31K31EV 4WSEEM -X/49ET31K31EV 4WSEEM -X/9ET31K31EV 4WSEEM -X/79ET31K31EV 4WSEEM -X/9ET31K31EV referred types and standard components are highlighted in the RS (Standard rice list). Valves with integrated control electronics, mechanical and electrical feedback Material No. Type 4WSEED R619 4WSEED -X/9ET31K31EV R7 4WSEED -X/9ET31K31EV R911 4WSEED -X/9ET31K31EV R913 4WSEED -X/9ET31K31EV R9136 4WSEED -X/49ET31K31EV R WSEED -X/9ET31K31EV R WSEED -X/79ET31K31EV R918 4WSEED -X/9ET31K31EV Symbols Simplified Valves for external control electronics Valves with integrated control electronics a, b a, b Detailed Mechanical feedback T Electrical and mechanical feedback T a, b a, b T T 4WS.E 3/ RE 9 64/ /7.3

4 Function, section 4WS(E)EM-X/... The valve types 4WS(E)EM-X/... are electrically actuated, -stage servo directional valves with a porting pattern to DIN 4 3 form. They are primarily used for the closed loop control of position, force and velocity. These valves comprise of an electro-mechanical convertor (torque motor) (1), a hydraulic amplifier (flapper jet principle) () and a control spool (3) in a bush (nd stage), that is connected to the torque motor via a mechanical feedback. Via an electrical input signal at the coils (4) of the torque motor, a force is generated via a permanent magnet at the armature (), that in conjunction with a torque tube (6) generates a torque. Due to this the flapper plate (7), which is connected with the torque tube (6) via a rod, is moved out of the central position between the control orifices (8) a pressure differential now results which acts on the front face of the control spool. This pressure differential causes the spool to move, whereby the pressure connection is connected to an actuator connection and at the same time the other actuator connection is connected to the return connection. The control spool is connected via a feedback spring (mechanical feedback) (9) to the flapper pate and torque motor. The control spool continues to change position until the torque feedback, via the feedback spring and the electro-magnetic torque of the torque motor are balanced, and the pressure differential at the flapper jet system becomes zero. The stroke of the control spool and thus the flow through the pilot control valve is closed loop controlled in proportion to the electrical input signal. It has, however to be taken into account that the flow is dependent on the valve pressure differential. Typ 4WSEM External control electronics, type 4WSEM-X/... (separate order) External electronics, (servo amplifier), are used to control the valve, they so amplifiy the analogue input signal (command value) that the controlled current output signal is capable of driving the servo valve. Integrated control electronics, types 4WSEEM-X/... and 4WSEED-X/... For the amplification of the analogue input signal control electronics (), which are specially matched to this valve, are integrated into the valve. They are built into the torque motor cover plate. The valve zero point can be adjusted by a potentiometer which is externally accessible. 4WSEED-X/... This type of valve has in addition to the mechanical control via a feedback spring an electrical spool position acquisition and closed loop control. The spool position is obtained via an inductive position transducer (11). The position transducer signal is compared with the command value via the integrated control electronics (). ny possible control deviation is electrically amplified and then passed onto the torque motor as a control signal. With the additional electrical feedback it is possible to obtain higher dynamic values in the small signal range than the mechanical version due to the electrical closed loop amplification. The mechanical feedback ensures that, in the case of failure of the electrical power supply, the spool is positioned in the zero range. The valve is only available with integrated control electronics. The valve zero point can be adjusted by an externally accessible potentiometer Type 4WSEM T T 3 RE 9 64/ /7.3 4/ 4WS.E

5 Section Type 4WSEEM T T Type 4WSEED 11 T T 4WS.E / RE 9 64/ /7.3

6 Technical data (for applications outside these parameters, please consult us!) General orting pattern Installation Storage temperature range C to + 1) The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filtration prevents faults from occuring and at the same time increases the component service life. For the selection of filters see catalogue sheets RE, RE 76 and RE 81. DIN 4 3 form Optional, it has to be ensured the pilot control is supplied with adequate pressure, ( bar) when starting-up the system! mbient temperature range C to + (valves with external control electronics) Weight With mechanical feedback kg 3.6 With mechanical and electrical feedback kg 3.6 and integrated electronics Hydraulic (measured with HL 3, ϑ oil = C ± C) to + (valve with integrated electronics) Operating pressure: ilot control stage, pilot oil supply bar to or to 31 Main valve, ports,, bar Up to 31 Return pressure: ort T Internal pilot oil drain bar ermissible pressure peaks < External pilot oil drain bar Up to 31 ort Y bar ermissible pressure peaks <, static < ressure fluid Mineral oil (HL, HL) to DIN 1 4, other pressure fluids on request! ressure fluid temperature range C 1 to +; preferably + to + Viscosity range mm /s 1 to 3; preferably to 4 Cleanliness class to ISO codes Maximum permissible degree of contamination of the pressure fluid is to ISO 46 (C) class 18/16/13 1) Zero flow q ) V,L p 4) p 4) p 4) p 4) p 4) L L L L L measured without dither signal L/min,7,9 1, 1, 1,7 bar min bar min bar min bar min bar min Nominal flow q V nom ± % 3) with a valve pressure differential p = bar ) L/min 4 7 Control spool stroke mm,9,43,74,99 1,1 Max. possible control spool stroke at mechanical end stop referring to the nominal stroke (in the case of a fault) % 1 to 1 1 to 1 1 to 1 Feedback system mechanical (M) mech. and elektr. (D) Hysteresis (dither optimised) % 1,,8 Reversal span (dither optimised) %,3, Response sensitivity (dither optimised) %,,1 ressure amplification 1 % spool stroke change (from the hydraulic zero point) % of p alance current over the entire operating pressure range % 3, long term Zero displacement with changes to: ressure fluid temperature %/ C 1 mbient temperature %/ C 1 Operating pressure to 1 % of p %/ bar Return pressure to % of p %/bar 1 1 ) q V,L = Zero flow in L/min 3) q V nom = Nominal flow (entire valve) in L/min 4) p = Operating pressure in bar ) p = Valve pressure differential in bar RE 9 83/7.3 6/ 4WS.E

7 Technical data (for applications outside these parameters, please consult us!) Electrical Feedback system Mechanical M Mechanical and electrical D Valve protection to EN 9 Signal type I 6 with mounted and fixed plug-in connector nalogue Nominal current per coil m Resistance per coil Ω 8 Inductivity at Hz and % nom. current: Serial connection H 1. arallel connection H. Recommended superimposed The amplitude is dependent on the hydraulic system: dither signal: f = Hz max. % of the nominal current Electrical, external control electronics (only version M ) mplifier Eurocard format nalogue Type VT-SR-1X/... to catalogue sheet RE 9 9 (separate order) Module format nalogue Type VT 11 to catalogue sheet RE Note: For details regarding the environmental simulation test covering EMC (electro-magnetic compatibility), climate and mechanical loading see RE 9 83-U (Declaration regarding environmental compatibility). lug-in connectors lug-in connector to DIN EN Separate order under Material No. R38 (metal version) F 8 Ø8 Ø13, C D E Electrical connections, external control electronics Type 4WSEM -X Coil Coil C D E F E The electrical connections can be made in either series or parallel. Due to operational safety reasons and the low coil inductivity, we recommend the parallel connection. The bridge E-F can be used for the electrical recognition that the plug is correctly connected or for cable break recognition. arallel connection: In the plug-in connector connect contact with and C with D. Serial connection: In the plug-in connector connect contact with C. Electrical control from (+) to D ( ) causes a flow direction of to and to T. y reversing the electrical control the direction of flow is to and to T. E F = ridge 4WS.E 7/ RE 9 83/7.3

8 Electrical connections, integrated control electronics Type 4WSEEM -X/ Zero point adjustment Dither signal R e Type 4WSEED -X/ Zero point adjustment C D E 1) F E Current Voltage lug-in connector control control allocation Control "13" Control "9" ower + 1 V + 1 V supply 1 V 1 V (± 3 %) C D ± m ± V Command value E R e = Ω R e kω Measurement output F 1) ± m ) ± V against ) for control spool max. ohmic load 1 kω R i 4.7 kω 1) For valves with mechanical feedback connection F is not allocated. ) With spool nominal stroke Sensitivity adjustment Dither signal adjustment R e R i C D E F E ower consumption at plug-in connector connection D E max. 1 m max. 1 m to ± m. m ower supply: ± 1 V ± 3 %, residual ripple < 1 % Command value: Measurement ouput: Command value at plug-in connector connection D = positive against plug-in connector connection E causes a flow from to and to T. Measurement output F has a positive signal against. Command value at plug-in connector connection D = negative against plug-in connector connection E causes a flow from to and to T. Measurement output F has a negative signal against. The voltage signal is proportional to the control spool stroke. Note: Electrical signals (e.g. actual value) obtained via the valve electronics must not be used to switch-off the machine safety functions! (lso see European standard regulations "Safety requirements of fluid technology systems and components hydraulics"en 98!) RE 9 64/ /7.3 8/ 4WS.E

9 Characteristic curves (measured with HL 3, ϑ oil = C ± C ) Flow-load function (folerance ± %) at % command value signal Nominal flow L/min curve 1 L/min curve L/min curve 3 L/min curve 4 4 L/min curve L/min curve 6 7 L/min curve 7 L/min curve 8 Flow in L/min Valve pressure differential in bar p = Valve pressure differential (inlet pressure p minus load pressure p L and minus return pressure p T ) Tolerance field of the flow signal function at a constant valve pressure differential Flow in % ; T Tolerance field Typical flow curve Command value in % 1 ; T 4WS.E 9/ RE 9 83/7.3

10 Characteristic curves: types 4WS.EM and 4WSEED (measured with HL 3, ϑ oil = C ± C ) Transient functions with the 31 bar pressure stage, step response without flow 4WS.EM Nominal flow,, L/min 4WSEED Nominal flow,, L/min bar bar 1 bar bar 31 bar Frequency response with the 31 bar pressure stage, stroke frequency response without flow mplitude relationship in d 4WS.EM Nominal flow,, L/min hase angle in 4WSEED Nominal flow,, L/min % % % mplitude relationship in d hase angle in The relationship of the frequency f at to the operating pressure p and the input amplitude 4WS.EM Nominal flow,, L/min 1 3 Frequency at in Hz 4WSEED Nominal flow,, L/min 1 3 Frequency at in Hz bar bar 1 bar bar 31 bar RE 9 83/7.3 / 4WS.E

11 Characteristic curves: types 4WS.EM and 4WSEED (measured with HL 3, ϑ oil = C ± C ) Transient functions with the 31 bar pressure stage, step response without flow 4WS.EM Nominal flow L/min 4WSEED Nominal flow L/min bar bar 1 bar bar 31 bar Frequency response with the 31 bar pressure stage, stroke frequency response without flow 4WS.EM Nominal flow L/min 4WSEED Nominal flow L/min mplitude relationship in d hase angle in % % % mplitude relationship in d hase angle in The relationship of the frequency f at to the operating pressure p and the input amplitude 4WS.EM Nominal flow L/min 1 3 Frequency at in Hz 4WSEED Nominal flow L/min 1 3 Frequency at in Hz bar bar 1 bar bar 31 bar 4WS.E 11/ RE 9 83/7.3

12 Characteristic curves: types 4WS.EM and 4WSEED (measured with HL 3, ϑ oil = C ± C ) Transient functions with the 31 bar pressure stage, step response without flow 4WS.EM Nominal flow 4 L/min 4WSEED Nominal flow 4 L/min bar bar 1 bar bar 31 bar Frequency response with the 31 bar pressure stage, stroke frequency response without flow 4WS.EM Nominal flow 4 L/min 4WSEED Nominal flow 4 L/min mplitude relationship in d 1 hase angle in 1 1 mplitude relationship in d 1 hase angle in 1 1 % % % The relationship of the frequency f at to the operating pressure p and the input amplitude 4WS.EM Nominal flow 4 L/min 4WSEED Nominal flow 4 L/min 1 3 Frequency at in Hz 1 3 Frequency at in Hz bar bar 1 bar bar 31 bar RE 9 83/7.3 1/ 4WS.E

13 Characteristic curves: types 4WS.EM and 4WSEED (measured with HL 3, ϑ oil = C ± C ) Transient functions with the 31 bar pressure stage, step response without flow 4WS.EM Nominal flow L/min 4WSEED Nominal flow L/min bar bar 1 bar bar 31 bar Frequency response with the 31 bar pressure stage, stroke frequency response without flow mplitude relationship in d 1 4WS.EM Nominal flow L/min hase angle in 1 1 mplitude relationship in d 1 4WSEED Nominal flow L/min % % % hase angle in 1 1 The relationship of the frequency f at to the operating pressure p and the input amplitude 4WS.EM Nominal flow L/min 1 3 Frequency at in Hz 4WSEED Nominal flow L/min 1 3 Frequency at in Hz bar bar 1 bar bar 31 bar 4WS.E 13/ RE 9 83/7.3

14 Characteristic curves: types 4WS.EM and 4WSEED (measured with HL 3, ϑ oil = C ± C ) Transient functions with the 31 bar pressure stage, step response without flow 1 4WS.EM Nominal flow 7 L/min Frequency at in Hz Frequency at in Hz 4WSEED Nominal flow 7 L/min bar bar 1 bar bar 31 bar Frequency response with the 31 bar pressure stage, stroke frequency response without flow mplitude relationship in d 4WS.EM Nominal flow 7 L/min hase angle in mplitude relationship in d 4WSEED Nominal flow 7 L/min % % % The relationship of the frequency f at to the operating pressure p and the input amplitude 4WS.EM Nominal flow 7 L/min 4WSEED Nominal flow 7 L/min bar bar 1 bar bar 31 bar hase angle in RE 9 83/7.3 14/ 4WS.E

15 Characteristic curves: types 4WS.EM and 4WSEED (measured with HL 3, ϑ oil = C ± C ) Transient functions with the 31 bar pressure stage, step response without flow 4WS.EM Nominal flow L/min 4WSEED Nominal flow L/min bar bar 1 bar bar 31 bar Frequency response with the 31 bar pressure stage, stroke frequency response without flow mplitude relationship in d 1 4WS.EM Nominal flow L/min hase angle in 1 1 mplitude relationship in d 1 4WSEED Nominal flow L/min hase angle in 1 1 % % % The relationship of the frequency f at to the operating pressure p and the input amplitude 4WS.EM 4WSEED Nominal flow L/min Nominal flow L/min Frequency at in Hz Frequency at in Hz bar bar 1 bar bar 31 bar 4WS.E 1/ RE 9 83/7.3

16 Unit dimensions: type 4WSEM (dimensions in mm) Mechanical feedback / external control electronics, Type 4WSEM -X/ , M6 9, 46 4 X Y 6 3,7 T T 1, 1 Cap lug-in connector (separate order, see page 7) 3 Space required to remove the plug-in connector, take connection cable into account! 4 Exchangeable filter element Material No.: R6843 with FKM seal /F, M = Nm rofile seal for filter screw 16 x 1. Material No.: R13 (FKM seal) 6 Name plate 7 Identical seal rings for ports,,, T and T 8 Identical seal rings for ports X and Y orts X and Y are also pressurised with the option "internal" pilot oil. 9 Machined valve contact area, position of ports to DIN 4 3 form, ISO 41 and CETO-R11H Valve fixing screws 4 off M6 x DIN NEL, M = 16 Nm (are included within the scope of supply) ,6/mm R max 4 Required surface finish of the mating piece 13, 46 11,1 1, 7,9 X T 4 61,9 Y T 6 Subplates to catalogue sheet RE 4 4 must be ordered separately. G 66/1 (G 3/8) G 67/1 (G 1/) G 3/1 (G 3/4) G 3/ (M 7 x ) G 36/1 (G 1) With ports X and Y G 36/ (M 33 x ) 9 RE 9 83/7.3 16/ 4WS.E

17 Unit dimensions: type 4WSEEM (dimensions in mm) Mechanical feedback / integrated control electronics Type 4WSEEM -X/ , M ,7 46 9, X Y 6 T T 1 Cap with integrated control eclectronics Electrical zero point adjustment: fter removing the./f plug, a correction, via a potentiometer, to the zero point is possible. 3 lug-in connector (separate order, see page 7) 4 Space required to remove the plug-in connector, take connection cable into account! Exchangeable filter element Material No.: R6843 with FKM seal, /F, M = Nm 6 rofile seal for filter screw 16 x 1. Material No.: R6843 (FKM seal) 7 Name plate 8 Identical seal rings for ports,,, T and T 9 Identical seal rings for ports X and Y orts X and Y are also pressurised with the option "internal"pilot oil. Machined valve contact area, position of ports to DIN 4 3 form, ISO 41 and CETO-R11H 11 Valve fixing screws 4 off M6 x DIN NEL, M = 16 Nm (are included within the scope of supply) 1, ,6/mm R max 4 Required surface finish of the mating piece 4WS.E 17/ RE 9 83/7.3 13, 46 11,1 7,9 X T 1, 4 61,9 Y T 6 Subplates to catalogue sheet RE 4 4 must be ordered separately. G 66/1 (G 3/8) G 67/1 (G 1/) G 3/1 (G 3/4) G 3/ (M 7 x ) With ports X and Y G 36/1 (G 1) G 36/ (M 33 x ) 9

18 Unit dimensions: type 4WSEED (dimensions in mm) Electrical and mechanical feedback / integrated control electronics Type 4WSEED -X/ ,, M ,7 9, 46 X T T Y 6 1 Cap with integrated control electronics Electrical zero point adjustment: fter removing the./f plug, a correction, via potentiometer, to the zero point is possible. 3 lug-in connector (separate order, see page 7) 4 Space required to remove the plug-in connector, take connection cable into account! Exchangeable filter element Material No.: R6843 with FKM seal, /F, M = Nm 6 rofile seal for filter screw 16 x 1. Material No.:R13 (FKM seal) 7 Name plate 8 Identical seal rings for ports,,, T and T 9 Identical seal rings for ports X and Y ports X and Y are also pressurised with the option "internal"pilot oil. Machined valve contact area, position of ports to DIN 4 3 form, ISO 41 and CETO-R11H 11 Valve fixing screws 4 off M6 x DIN NEL, M = 16 Nm (are included within the scope of supply) 4 4,6/mm R max 4 Required surface finish of the mating piece 13, 46 11,1 7,9 X T 1, 4 61,9 Y T 6 Subplates to catalogue sheet RE 4 4 must be ordered separately. G 66/1 (G 3/8) G 67/1 (G 1/) G 3/1 (G 3/4) G 3/ (M 7 x ) G 36/1 (G 1) With ports X G 36/ (M 33 x ) and Y 9 RE 9 83/7.3 18/ 4WS.E

19 ilot oil conversion from internal/external ilot oil supply 1 External pilot oil supply S.H.C.S. item is fitted. Internal pilot oil supply S.H.C.S. item is removed 1 Vavle housing S.H.C.S. M3 x DIN 91-.9, M = 1.4 Nm ilot oil drain Y 1 3 External pilot oil drain S.H.C.S. item is fitted. Internal pilot oil drain S.H.C.S. item is removed 1 Vavle housing S.H.C.S. M3 x DIN 91-.9, M = 1.4 Nm 3 lug M8 x 1 with seal, Material No M = Nm Flushing plate to DIN 4 3 form (dimensions in mm) Symbol T X Y T With FKM seals, Material No. R914, Weight: kg 1 R-ring 13 x 1.6 x (,,, T and T) R-ring 11,18 x 1.6 x 1.78 (X, Y) 3 4 off S.H.C.S. M6 x DIN 91.9, M =16Nm (are included within the scope of supply) 4 orting pattern to DIN 43, form In order to guarantee that the servo valves function correctly, it is absolutely necessary to flush the system before commissioning. Cleanliness class to ISO code, see page 6. The following is a guide to the flushing time necessary for the installation: t V q V t V = Flushing time in hours = Tank contents in litres q V = ump flow in litres per minute If the tank neecs to be refilled with more than % of its capacity it will be necessary to reflush the system. directional control valve with a porting pattern to DIN 4 3 form is more suitable than a flushing plate for the flushing operation, as the actuator lines can also be flushed. lso see catalogue sheet RE X T 61,9 Y T 6,6 18 9,, 46, 4WS.E 19/ RE 9 83/7.3

20 Notes osch Rexroth G Industrial Hydraulics D Lohr am Main Zum Eisengießer 1 D Lohr am Main Telefon 93 / 18- Telefax 93 / Telex documentation@boschrexroth.de Internet osch Rexroth Limited Cromwell Road, St Neots, Cambs, E19 ES Tel: 14 / 3 6 Fax: 14 /1 info@boschrexroth.co.uk The data specified above only serves to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The details stated do not release you from the responsibility for carrying out your own assessment and verification. It must be remembered that our products are subject to a natural process of wear and ageing. RE 9 83/3.99 / 4WS.E