4-Way Servo Valve Model 4 WS. 2 E , (Series 2X) with Mounting Pattern to DIN or CETOP RP 115 H PSI (315 bar) H/A 3012 H/A 3013

Transcription

1 4-Way Servo Valve Model 4 WS. 2 E , (Series 2X) with Mounting attern to DIN 24 3 or CETO R 11 H Size SI (31 bar)... 3 GM (0 L/min) R 29 91/06.98 R 29 91/06.98 Replaces: stage servo valve with mechanical feedback and optionally with integrated electronics lternative: with electrical and mechanical feedback and with integrated electronics 1st stage flapper/nozzle design Dry, 2-gap torque motor with high natural frequency Input orifices made of ruby low zero point drift Wear resistant connection spool/feedback element Good sensitivity, low hysteresis Suitable for position, speed, pressure and force control Control: external electronics, Model VT-SR8 (Euro card, separate order), see pages 4 and 16 or electronics integrated into valve H/ 3012 Model 4 WS 2 EM 16-2X/... with mechanical feedback and control electronics (ordered separately) H/ 3013 Contents: Name age Symbols 1 Description of function, section 2 Ordering codes 3 Notes on the ordering codes 3 Technical data 4 Electrical connections/terminal connections Operating curves 6 Unit dimensions ilot oil supply, flushing plate, flushing instructions 1 Control electronics 16 Model 4 WSE 2 ED 16-2X/... with electrical and mechanical feedback and integrated electronics Valve symbols (simplified) With mechanical feedback With mechanical and electrical feedback and integrated electronics a, b a 0 b a, b a, b a 0 b a, b T T T T 1/16

2 T R 29 91/06.98 Functional Description and Cross Section Valves, Model 4 WS. 2 EM and 4 WSE 2 ED are electrically operated, 2-stage servo directional valves with a mounting pattern to DIN 24 3 form 16 NF/NSI D 07 or optionally CETO R 11 H Model. They basically consist of: 1st stage (1) with permanent magnet control motor (2) and hydraulic amplifier (3) designed as a flapper/jet pilot valve 2nd stage (4) for control of main flow The pilot control operates as a flapper/nozzle design. Torque tube () centralizes flapper plate (6) and armature (7) in the center position, when torque motor (2) is not operated. change in the electrical input signal of coils (8) of torque motor (2) causes a torque to be produced at armature (7). Hence flapper plate (6) moves from its center position between orifices (9). The pressure drop produced acts on the ends of control spool (). Due to the effect of the pressure drop the control spool changes its position. 4 WS 2 EM 16 feedback element (11) connected to armature (7) is inserted in the groove of the control spool. Control spool () changes its position until the feedback torque together with the electrical motor torque are in balance and the pressure drop has been reduced to zero. The stroke of control spool () is therefore proportional to the electrical input signal. Model 4 WSE 2 ED The actual flow from the valve to the actuator is dependent on the valve pressure drop. External control electronics (servo amplifier) are used for control. This control amplifies an analog input signal (command signal) in such a way that the output signal from the control electronics can be used to control the servo valve. 4 WSE 2 EM 16 Instead of using external control electronics, the valve is equipped with integrated electronics (12). It is mounted on top of the torque motor and encapsulated. Voltage supply: ± 1 V Command signal: ± V; alternative ± m 4 WSE 2 ED 16 In addition to the mechanical feedback of the spool position, the position of the spool is measured by an inductive positional transducer (13). The signal coupling of the valve control circuit, the supply to the positional transducer system and the control of the 1st stage are carried out by control electronics (12) integrated in the valve. Voltage supply: ± 1 V Command signal: ± V; alternative ± m ctual signal: ± V If electrical power fails, mechanical feedback of the spool position ensures that the spool of the main stage is positioned within ± % of the spool nominal stroke X /16

3 Ordering Code R 29 91/06.98 Electrically operated 2-stage 4-way servo valve for external electronics = 4 WS 2 E with integrated electronics = 4 WSE 2 E Mechanical feedback = M Mechanical and electrical feedback (only with integrated electronics) = D Mounting pattern to DIN 24 3 form 16, NF/NSI D 07 = 16 Mounting pattern to CETO R 11 H Typ = 16 Series to 29 = 2X ( to 29, externally interchangeable) Nominal flow 1 at valve pressure drop p V = 1 SI (70 bar) 26.4 GM ( L/min) = 39.6 GM ( L/min) = 2.8 GM (0 L/min) = 0 (Note tolerance of flow/signal function on page 6) Coil or control data 2 Valves for external electronics Coil no. 12 (0 m/ Ω per coil) = 12 Valves with integrated electronics Control: Command signal ± m/1 kω = 8 Command signal ± V/ 0 kω = 9 2X 12 E E = 6 M = V = * Further details to be written in clear text NR seals suitable for petroleum oils (HM, HL, HL) FM seals (HFD-R) Spool overlap 0 to 0. % negative Electrical connection Valves for external electronics: K8 = Socket without plug Valves with integrated electronics: K9 = Socket without plug 4 Input pressure range 2 = SI (... 2 bar) 31 = SI ( bar) 3 ilot oil feed and drain ET = Internally piloted and internally dreined T = Externally piloted and internally drained 7 Explanation of ordering codes: 1 Nominal flow 4 Input pressure range The nominal flow refers to the initial gradient of the flow signal function, extended to up to % command signal at 0 SI (70 bar) valve pressure drop (3 bar per control land). This valve pressure drop is to be considered as a reference value. Other values cause a change in flow. lease take into consideration a The system pressure must be maintained as constant as possible. ilot pressure range: SI ( to 2 bar) or SI ( to 31 bar). Within the permissible pressure range the dynamic response must be considered frequency dependent. possible nominal flow tolerance of ± % and a saturation effect at flows of over 2.8 GM (0 L/min) (see flow/load function on Spool overlap page 6). If required, servo valve with special performance curves (two stage, progressive) may be supplied. However, a specification is required. The spool overlap in % refers to the control spool nominal stroke. For closed loop control we recommend spool "E". Other spool overlaps on enquiry! 2 Electrical control data 6 Seal material Valves for external electronics: If other seal materials are required please consult us! The positioning signal must be generated by a current regulated output stage. 7 Details in clear text See page 16 for servo amplifiers. Specal requirements are to be specified in clear text. fter receipt of the order they will be checked by the factory and the type code Valves with integrated electronics: will be completed with an associated number. For integrated electronics, the command signal may be a voltage or for greater distances [ ft (2 m) (> 2 m between control and valve)] a current input. 3 Input pressure for pilot control The pilot pressure must be maintained as constant as possible. Therefore an external pilot control via port X is often advantageous. The dynamic response of the valve may be influenced using a higher pressure at X than at. 3/16

4 R 29 91/06.98 Technical Data (For operation outside these parameters, please consult us!) General Mounting pattern 16 DIN 24 3 form 16, NF T3..1M R1, NSI 93.7 D CETO R 11 H type Installation position Optional It must be ensured that the pilot control is supplied with sufficient pressure 14 SI ( bar)! mbient temperature range F ( C) ( 30 to +) [valve for external electronics] ( 30 to + ) [valve with integrated electronics] Weight lbs (kg) Valve with mechanical feedback 22 (.0) Valve with mechanical and electrical feedback 24 (11.0) Flushing plate, ordering code (see page 1) 6.6 (3.0) Hydraulic, measured at a control or operating pressure of 304 SI (2 bar), oil viscosity of ν = 148 SUS (32 mm 2 /s) and t = 4 F ( C) Feedback system Mechanical Mechanical and electrical Operating pressure SI (bar) ( to 2) orts,,, X ( to 31) Feedback pressure, port T SI (bar) ressure peaks < 140 () Fluid etroleum oil (HM, HL, HL) Fluid F ( C) (... 90) (... ) temperature range (preferrably [... 0]) Viscosity range SUS (mm 2 /s) ( to 3); preferably (30 to 4) Fluid cleanliness Maximum permissible degree of contamination of fluid to ISO 46 Class 16/13. We therefore recommend a filter with a minimum retention rate of ß without by-pass valve, as close as possible in front of the servo valve. Nominal flow Q N ± % 1) GM (L/min) 26.4 () 39.6 () 3 (0) at valve pressure drop p V = 70 bar 2) ressure gain (spool overlap E ) % of p 6 90 at 1 % change in stroke (starting from zero) Control spool stroke mm Control spool area mm ) Null flow Q L (spool overlap E ) p measured without dither signal L/min 3. L/min 4) 70 Hysteresis (optimum dither) % Reversal range (optimum dither) % Response sensitivity (optimum dither) % Electrical Insulation Exceeds NEM class Exceeds NEM class Type of signal analog Nominal current per coil m 0 Resistance per coil Ω Inductance at Hz and % nominal current: Series circuit H 0.96 arallel circuit H 0.24 Recommended superimposed mplitude depends on hydraulic system: dither signal: f = 0 Hz max. % of nominal current Null balance current % 3, long period 2 over complete operating pressure range Null offset at change in: Fluid temperature % 1. / 68 F ( C) 1.2 / 68 F ( C) mbient temperature % 1 / 68 F ( C) 0. / 68 F ( C) Operating pressure % 2 / bar 1 / bar Return pressure 0 to 0.1 p % 1 0. Control electronics, Model 4 WS 2 EM... Servo amplifier VT-SR8 (separate order) (see page 16 or data sheet R ) 1) Q N = Nominal flow (complete valve) in L/min 2) p V = Valve pressure drop in bar 3) Q L = Null flow in L/min 4) p = Operating pressure in bar 4/16

5 Electrical connection of coils in plug (for valves with external electronics) R 29 91/06.98 The electrical connection may be designed as either a parallel or series circuit. For reasons of operational safety and low coil inductance we recommend the parallel circuit. 4 WS 2 EM 16-2X/... (DIN/NF/NSI mounting pattern) 4 WS 2 EM 16-2X/... (CETO mounting pattern) blue red blue red C D blue red arallel circuit: In plug connect contact with and C with D. Series circuit: In plug connect contact with C. Electrical control from (+) to D ( ) causes the direction of flow to be from to and to T. Reversed electrical control causes the direction of flow to be from to and to T. C D blue red arallel circuit: In plug connect contact with C and with D. Series circuit: In plug connect contact with C. Electrical control from (+) to D ( ) causes the direction of flow to be from to and to T. Reversed electrical control causes the direction of flow to be from to and to T. Connecting cable: 4 core, 18WG (0.7 mm 2 ), shielded outside diameter 0.26 to 0.44 in (6. to 11.2 mm) Only connect shield to 0 V or earth ground on the supply side. Terminal connections 4 WSE 2 E. 16 (Valves with integrated electronics) Null point setting Integrated electronics R i R e C D E F Current input signal 1) In valves without electrical feedback terminal F is not connected. Voltage input signal Terminal connections Control 8 Control 9 Supply +1 V +1 V voltage 1 V 1 V (± 3 %) C 0 V 0 V Command signal D ± m; ± V E R e = 1 kω R e 0 kω Measuring output F 1) Nom. stroke corresponds to approx. ± V for control spool with respect to ; R i = 1 kω Current maximum maximum consumption m m at plug terminal D 0 to ± m 0.2 m E Supply voltage: ± 1 V ± 3 %, ripple < 1 % Command signal: Measuring output: Connecting cable: If the command signal at plug terminal D is negative with respect to plug terminal E this causes flow to be from to and to T. Measured output F has negative signal with respect to 0 V. If the command signal at plug terminal D is positive with respect to plug terminal E this causes flow to be from to and to T. Measured output F has positive signal with respect to 0 V. Voltage signal V F is proportional to the control spool stroke. 6 core, 18 WG (0.7 mm 2 ), shielded Outside diameter 0.26 to 0.44 in (6. to 11.2 mm) Only connect shield to 0 V or earth ground on the supply side. /16

6 R 29 91/06.98 Operating Curves, measured at ν = 148 SUS (32 mm 2 /s) and t = 4 F ( C) Flow/load function (tolerance ± %) at % command signal Tolerance range of flow/signal function at constant valve pressure drop (0) (700) Flow in % ; T (00) 132 Flow Q N in GM (L/min) (0) (300) (0) () () (70) (0) () (30) () Q N = 3 (0) Q N = () Q N = 27 () Zero through break according to spool overlap Typical flow curve Tolerance field Command value in % 1 ; T () () (30) (0) () (0) (300) Valve pressure drop p V in SI (bar) p V = Valve pressure drop (input pressure minus return pressure and minus load pressure) The flow/load function operating curves are valid for valves with spool type "E" and a command signal of %. In valves with positive overlap the flow is reduced by the value of the overlap. Standard valves have spool type "E". If other spool overlaps are chosen the flow gain changes in the signal region of ±%. The tolerance range of the flow signal function is within ±% of the nominal flow curve. The initial gradient of the curve is dependent on the nominal flow. 6/16

7 Operating Curves, Model 4 WS. 2 EM 16: measured at ν = 148 SUS (32 mm 2 /s) and t = 4 F ( C) R 29 91/06.98 Crossover function with pressure setting 304 SI (2 bar) and with pressure setting 40 SI (31 bar) Step response without flow Nominal flow 26.4 GM ( L/min) Nominal flow 39.6 GM ( L/min) Spool stroke in % Spool stroke in % Time in ms Time in ms SI ( bar) 1 SI (70 bar) 30 SI (1 bar) Frequency response with pressure setting 304 SI (2 bar), p = 304 SI (2 bar) and with pressure setting 40 SI (31 bar), p = 40 SI (31 bar) 304 SI (2 bar) and 40 SI (31 bar) Stroke frequency response without flow mplitude characteristic in d Nominal flow 26.4 GM ( L/min) Frequency in Hz hase angle in % mplitude characteristic in d Flow 39.6 GM ( L/min) Frequency in Hz hase angle in % % 2 % % Dependency of corner frequency on operating pressure p Nominal flow 26.4 GM ( L/min) Nominal flow 39.6 GM ( L/min) Input amplitude in % Input amplitude in % Input amplitude 90 in Hz SI ( bar) 1 SI (70 bar) 30 SI (1 bar) Output signal = spool stroke without flow Input amplitude 90 in Hz 304 SI (2 bar) and 40 SI (31 bar) 7/16

8 R 29 91/06.98 Operating Curves, Model 4 WS. 2 EM 16: measured at ν = 148 SUS (32 mm 2 /s) and t = 4 F ( C) Crossover function with pressure setting 304 SI (2 bar) and with pressure setting 40 SI (31 bar) Step response without flow Spool stroke in % Nominal flow 2.8 GM (0 L/min) SI ( bar) 1 SI (70 bar) 30 SI (1 bar) 304 SI (2 bar) Time in ms Frequency response with pressure setting 304 SI (2 bar), p = 304 SI (2 bar) and with pressure setting 40 SI (31 bar), p = 40 SI (31 bar) Stroke frequency response without flow mplitude characteristic in d Nominal flow 2.8 GM (0 L/min) Frequency in Hz hase angle in % % 2 % % Dependency of corner frequency on operating pressure p Input amplitude in % Nominal flow 2.8 GM (0 L/min) SI ( bar) 1 SI (70 bar) 30 SI (1 bar) 304 SI (2 bar) and 40 SI (31 bar) Input amplitude 90 in Hz Output signal = spool stroke without flow 8/16

9 Operating Curves, Model 4 WSE 2 ED 16: measured at n = 148 SUS (32 mm 2 /s) and t = 4 F ( C) Crossover function with pressure setting 304 SI (2 bar) and with pressure setting 40 SI (31 bar) Step response without flow R 29 91/ Nominal flow 26.4 GM ( L/min) 1 Nominal flow 39.6 GM ( L/min) Spool stroke in % Spool stroke in % Time in ms SI ( bar) 1 SI (70 bar) 30 SI (1 bar) Time in ms 304 SI (2 bar) and 40 SI (31 bar) Frequency response with pressure setting 304 SI (2 bar), p = 304 SI (2 bar) and with pressure setting 40 SI (31 bar), p = 40 SI (31 bar) Stroke frequency response without flow mplitude characteristic in d Nominal flow 26.4 GM ( L/min) Frequency in Hz hase angle in % mplitude characteristic in d Nominal flow 39.6 GM ( L/min) Frequency in Hz hase angle in % Dependency of corner frequency on operating pressure p % 2 % % Nominal flow 26.4 GM ( L/min) Nominal flow 39.6 GM ( L/min) Input amplitude in % Input amplitude in % Input amplitude 90 in Hz SI ( bar) 1 SI (70 bar) 30 SI (1 bar) Input amplitude 90 in Hz 304 SI (2 bar) and 40 SI (31 bar) Output signal = spool stroke without flow 9/16

10 R 29 91/06.98 Operating Curves, Model 4 WSE 2 ED 16: measured at ν = 148 SUS (32 mm 2 /s) and t = 4 F ( C) Crossover function with pressure setting 304 SI (2 bar) and with pressure setting 40 SI (31 bar) Step response without flow Spool stroke in % Nominal flow 2.8 GM (0 L/min) SI ( bar) 1 SI (70 bar) 30 SI (1 bar) 304 SI (2 bar) Time in ms Frequency response with pressure setting 304 SI (2 bar), p = 304 SI (2 bar) and with pressure setting 40 SI (31 bar), p = 40 SI (31 bar) Stroke frequency response without flow mplitude characteristic in d Nominal flow 2.8 GM (0 L/min) Frequency in Hz hase angle in % % 2 % % Dependency of corner frequency on operating pressure p Nominal flow 2.8 GM (0 L/min) Input amplitude in % Input amplitude 90 in Hz SI ( bar) 1 SI (70 bar) 30 SI (1 bar) 304 SI (2 bar) and 40 SI (31 bar) Output signal = spool stroke without flow /16

11 R 29 91/06.98 Unit dimensions, Model 4 WS. 2 EM 16 (mounting pattern DIN 24 3/NF/NSI D 07): dimensions in inches (millimeters) (1) approx. (70).08 (129) 2.64 (67) 1.61 (41) 2.09 (3) 0.06 (1.).49 (139.) 4.88 (124) 3.0 (89) 3.3 (8) 3.8 (91) 6.08 (14.) Ø (23) (3) 0.12 (3) 7.32 (186) (34.1) (23) (91) 2.81 (71.) 2.7 (69.9) T X Required surface finish of interface when mounting the valve without our subplate /4.0 in 0.01/ mm 32 (R max 4) 0.06 (1.6) 0.41 (.) Ø (6.6) () (0) Ø (11) (1.6) Ø 0.41 (.) Ø 0.71 (18) 1.1 ilot control (1st stage) without integrated electronics (4 WS 2 EM 16) 1.2 ilot control (1st stage) with integrated electronics (4 WSE 2 EM 16) Electrical null point setting: Having removed the screw 2. /F the null point may be corrected by the potentiometer. 2 2nd stage 3.1 Without integrated electronics: plug compatible with MS36E 14S-2S RR With integrated electronics: plug compatible with MS36E 14S-6S RR Space required for removal of plug Do not damage connecting cable! For hydraulic zero setting point on both sides mm /F socket screw 6 Nameplate 7 Locating pin (2 off) 8 R-Ring 22.3 mm x 2.3 mm x 2.62 mm (O-Ring 22 mm x 2. mm); ports,, and T 9 R-Ring mm x 2 mm x 2 mm (O-Ring mm x 2 mm); port X Valve mounting interface to ISO 41-7 NF T3..1 M R1 and NSI 93.7 D 07 Subplates G 172/0 (3/4" NT) G 172/12 (SE-12; 1-1/16-12) G 174/0 (1" NT) G 174/12 (SE-16; 1-/16-12) G 174/08 (3/4" ISO flanged ports) Valve mounting bolts 2) 1/4- UNC x 4 (M6 x mm) 4) 3/8-18 UNC x 4 (M x mm) Socket head cap screws, SE grade 8 or better Tightening torque = 7.6 lb-ft (. Nm) for 1/4" (M6), 3 lb-ft (1 Nm) for 3/8" (M) Subplate and valve mounting bolts must be ordered separately, see R /16

12 R 29 91/06.98 Unit dimensions, Model 4 WS. 2 EM 16 (mounting pattern CETO R 11 H type ): dimensions in inches (millimeters) 0.6 (1) approx. (70).1 (129) 2.64 (67) 2.09 (3) 2.36 () 0.06 (1.).06 (128.) 4.44 (113) 3.1 () 2.9 (7).6 (143.) 0.91 (23) Ø 0.24 (6) 0. () 7.32 (186) 0.91 (23) 4.33 (1) 0.48 (12.1) (33.) 2.87 (73) 0. () 3.37 (8.7) T X 3. () Required surface finish of interface when mounting the valve without our subplate /4.0 in 0.006/ mm 32 (R max 4) Ø 0.41 (.) Ø 0.71 (18) 1.1 ilot control (1st stage) without integrated electronics (4 WS 2 EM 16 ) 1.2 ilot control (1st stage) with integrated electronics (4 WSE 2 EM 16 ) Electrical null point setting: Having removed the screw 2. /F the null point may be corrected by the potentiometer. 2 2nd stage 3.1 Without integrated electronics: plug compatible with MS36E 14S-2S RR With integrated electronics: plug compatible with MS36E 14S-6S RR Space required for removal of plug Do not damage connecting cable! For hydraulic zero setting point on both sides mm /F socket screw 6 Nameplate 7 Locating pin 8 R-Ring 22.3 mm x 2.3 mm x 2.62 mm (O-Ring mm x 2.62 mm); orts,, and T 9 R-Ring mm x 2 mm x 2 mm (O-Ring mm x 2 mm); port X 12/16

13 R 29 91/06.98 Unit dimensions, Model 4 WSE 2 ED 16 (mounting pattern DIN 24 3/NF/NSI D 07): dimensions in inches (millimeters) (1) 4 approx. (70).1 (129) (67) 2.09 (3) 1.61 (41) 0.06 (1.) (14.) 4.88 (124) 3.0 (89) 3.8 (91) 3.3 (8) 2.17 () (3) 8.8 (218) Ø 0.12 (3) (23) 0.24 (6) (34.1) 3.8 (91) 2.81 (71.) 2.7 (69.9) T X Required surface finish of interface when mounting the valve without our subplate /4.0 in 0.006/ mm 32 (R max 4) 0.41 (.) 0.06 (1.6) 0.79 () 1.97 (0) 4.00 (1.6) Ø 0.26 (6.6) Ø 0.43 (11) Ø 0.41 (.) Ø 0.71 (18) 1 ilot control (1st stage) with integrated electronics Electrical null point setting: Having removed screw 2. /F the null point may be corrected via the potentiometer. 2 2nd stage 3 lug compatible with MS36E 14S-6S RR Space required for removal of plug Do not damage connecting cable! Setting of hydraulic null point via two screws mm /F and 3 /F 6 Nameplate 7 Locating pin (2 off) 8 R-Ring 22.3 mm x 2.3 mm x 2.62 mm (O-Ring 22 mm x 2. mm); ports,, and T 9 R-Ring mm x 2 mm x 2 mm (O-Ring mm x 2 mm); port X Valve mounting interface to ISO 41-7 NF T3..1 M R and NSI 93.7 D 07 Subplates G 172/0 (3/4" NT)G 172/12 (SE-12; 1-1/16-12) G 174/0 (1" NT) G 174/12 (SE-16; 1-/16-12) G 174/08 (3/4" ISO flanged ports) Valve mounting bolts 2) 1/4- UNC x 4 (M6 x mm) 4) 3/8-18 UNC x 4 (M x mm) Socket head cap screws, SE grade 8 or better Tightening torque = 7.6 lb-ft (. Nm) for 1/4" (M6), 3 lb-ft (1 Nm) for 3/8" (M) Subplate and valve mounting bolts must be ordered separately, see R /16

14 R 29 91/06.98 Unit dimensions: Model 4 WSE 2 ED 16 (mounting pattern CETO R 11 H type ) dimensions in inches (millimeters) (1) 3 approx. (70).1 (129) 2.64 (67) 2.09 (3) () 0.06 (1.) 4.44 (113).6 (143.) 3.1 () 2.9 (7) 2.17 () Ø 0.24 (6) 8.83 (218) 0. () 0.91 (23) 0.24 (6) 4.33 (1) (12.1) 1.32 (33.) 2.87 (73) 0. () X Required surface finish of interface when mounting the valve without our subplate 3.37 (8.7) T 3.1 () /4.0 in 0.006/ mm (R max 4) Ø 0.41 (.) Ø 0.71 (18) 1 ilot control (1st stage) with integrated electronics Electrical null point setting: Having removed screw 2. /F, the null point may be corrected via potentiometer. 2 2nd stage 3 lug compatible with MS36E 14S-6S RR Space required to remove plug Do not damage connecting cable! 6 Nameplate 7 Locating pin 8 R-Ring 22.3 mm x 2.3 mm x 2.62 mm (O-Ring mm x 2.62 mm); ports,, and T 9 R-Ring mm x 2 mm x 2 mm (O-Ring mm x 2 mm); port X Mounting pattern to CETO R 11 H type Setting of hydraulic null point via 2 screws /F and 3 /F 14/16

15 Valve piloting ilot fluid drain is usually internal ilot fluid supply 13 1 M4 /F R 29 91/06.98 M4 /F X Internal pilot fluid supply (model ET ) 11 X External pilot fluid supply (model T ) Main valve 12 Cover 13 Filter, ordering no Open 14.2 Closed, screw M6 x DIN For 1st stage Flushing plate with mounting pattern to DIN 24 3 form 16, NF/NSI D 07: dimensions in inches (millimeters) 0.39 () 0.06 (1.) 3.4 (90) 2.82 (71.) 2.7 (69.9) 2.19 (.6) 0.6 (14.3) 22 Ø 0.12 (3) 1.7 () 4.72 (1) 4.00 (1.6) 3.28 (83.3) 2.66 (67.) 2.03 (1.6) 1.41 (3.7) 0.98 (2) 0.3 (13.) Y T X Ø 0.12 (3) Symbol 0.3 (8.8) 0.0 (12.7) 2.13 (4) 0.16 (4) TXY with NR seals Ordering no. RR O-Ring 22 mm x 2. mm; ports,,, T 21 O-Ring mm x 2 mm; ports X, Y 22 4 cylinder screws M x 0 DIN (are supplied); tightening torque = 1 Nm 23 2 cylinder screws M6 x 0 DIN (are supplied); tightening torque =,4 Nm 24 1 cylinder screw M6 x DIN (is supplied) 2 Sealing ring U 6.7 x x 1 26 Locating pin (2 off) In order to ensure that the servo valves function perfectly it is always necessary to flush the system before commissioning without fail. s a guideline for the flushing time per system the following may be used: V t Q t = flushing time in minutes V = tank contents in litres Q = pump flow in litres per minute If the tank is subsequently filled with more than % of the tank contents the flushing process must be repeated. directional valve with a port to NF/NSI D 07 is more suitable than a flushing plate. ctuator lines may also be flushed using this valve. 1/16

16 R 29 91/06.98 Notes 16/16 Mannesmann Rexroth Corporation Rexroth Hydraulics Div., Industrial, 231 City Line Road, ethlehem, Tel. (6) Fax: (6) Rexroth Hydraulics Div., Mobile, 1700 Old Mansfield Road, Wooster, OH Tel. (330) Fax: (330) ll rights reserved Subject to revision rinted in U.S..