Wenzhou Prance Hydraulic Equipment Co., Ltd
Hydraulic Pilot Operated Proportional Valve 4WRLE
1.Reliable
– proven and robust design
2.Safe
– The control spool of the pilot control valve is in the “fail safe” position when the unit is switched off
– The control spool of the main valve is in the spring centered central position and/or in the offset position
3.High quality – control spool and sleeve of the pilot control valve in servo quality
4.Flexible – suitable for position, velocity and pressurecontrol
5.Precise – high response sensitivity and little hysteresis
Detailed description
1.Reliable – With a proven and robust design, the valve has undergone long-term practical verification in various industrial scenarios, featuring strong structural stability and resistance to wear, vibration and harsh working environments, ensuring stable operation without frequent failures and reducing maintenance costs.
2.Safe – When the unit is switched off, the control spool of the pilot control valve automatically stays in the “fail safe” position, effectively preventing potential safety hazards caused by accidental movement of the system. Meanwhile, the control spool of the main valve is designed to be in the spring centered central position and/or offset position, cutting off the oil circuit or maintaining a safe state to further improve the overall safety of the equipment.
3.High quality – The control spool and sleeve of the pilot control valve adopt servo-level quality materials and precision processing technology, ensuring excellent fit, small friction coefficient and long service life, laying a solid foundation for the stable operation of the valve.
4.Flexible – It is widely suitable for position, velocity and pressure control scenarios, and can be flexibly matched with different hydraulic systems according to actual working requirements, adapting to various complex working conditions.
5.Precise – The valve has high response sensitivity, which can quickly respond to control signals, and has little hysteresis, ensuring accurate control of the system, meeting the requirements of high-precision operation in industrial production.
Ordering code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | |||
| 4 | WRL | E | J | - | 4X | / | / | 24 | * |
| 01 | 4 main ports | 4 |
| 02 | Directional control valve, pilot-operated | WRL |
| 03 | With integrated electronics (OBE) | E |
| 04 | Size 10 | 10 |
| Size 16 | 16 | |
| Size 25 | 25 | |
| Size 27 | 27 | |
| Size 35 | 35 |
| 05 | Symbols e.g. E, E1-, W6- etc.; possible version see page4 |
Rated flow (Δp = 5 bar/control edge)
| 06 | -Size 10 | |
| 60 l/min (only symbol E, E1-, W6-, W8-, V, V1-) | 60 | |
| 100 l/min | 100 | |
| -Size 16 | ||
| 200 l/min (only symbol W6- and W8-) | 200 | |
| 250 l/min (only symbol E, E1-, V, V1- and Q3-) | 250 | |
| -Size 25 | ||
| 350 l/min (only symbol W6- and W8-) | 350 | |
| 400 l/min (only symbol E,E1-, V, V1- and Q3-) | 400 | |
| -Size 27 | ||
| 430 l/min (only symbol W6- and W8-) | 430 | |
| 600 l/min (only symbol E, E1-, V, V1- and Q3-) | 600 | |
| -Size 35 | ||
| 1000 l/min (only symbol E, E1-, V, V1-) | 1000 | |
| 1200 l/min (only symbol W6-and W8-) | 1200 | |
| 1500 l/min (only symbol E, E1-, V, V1- and Q3-) | 1500 | |
Flow characteristic
| 07 | Linear | L |
| Linear with fine control range (available for NG 10, other sizes on request) | P | |
| Progressive with linear fine control (only symbol Q3-) | M |
| 08 | Overlap jump (opening point 5% with covered valve; only symbols E, E1-, W6-, W8-) | J |
| 09 | Component series 40 ... 49 (40 ... 49: unchanged installation and mounting dimensions) | 4X |
Seal material (observe compatibility of seals with hydraulic fluid used)
| 10 | NBR seals | M |
| FKM seals | V |
Pilot oil flow
| 11 | External pilot oil supply, external pilot oil return | XY |
| Internal pilot oil supply, external pilot oil return | PY | |
| Internal pilot oil supply,internal pilot oil return | PT | |
| External pilot oil supply, internal pilot oil return | XT |
| 12 | Without damping plate | without designation |
| With damping plate | D |
| 13 | Supply voltage 24 V | 24 |
Interfaces of the control electronics
| 14 | Command value input ±10V | A1 |
| Command value input 4 ... 20 mA | F1 | |
| IO-Link interface | L1 | |
| Command value ±10 mA, actual value 4 ... 20 mA, release (connector 6+PE) | C6 |
| 15 | Without electronics protection membrane | without designation |
| With electronics protection membrane | -967 |
| 16 | For further details, see the plain text | * |
Technical data(For applications outside these values, please consult us!)
General
| Size | NG | 10 | 16 | 25 | 27 | 35 | |
| Installation position | Any | ||||||
| Ambient temperature range | ℃ | -20...+60 | |||||
| Maximum storage time | years | 1 (if the storage conditions are observed; refer to the operating instructions 07600-B) | |||||
| Sine test according to DIN EN 60068-2-6 |
▶Without damping plate | 10 ... 2000 Hz/ maximum of 10 g/10 cycles /3 axes | |||||
| ▶With damping plate 1) | 10 ... 2000 Hz/ maximum of 10 g/10 cycles /3 axes | ||||||
| Noise test according to DIN EN 60068-2-64 |
▶Without damping plate | 20 ... 2000 Hz/10 gRMS /30 g peak /30 min./3 axes | |||||
| ▶With damping plate 1) | 20 ... 2000 Hz/10 gRMS /30 g peak /24 h/3 axes | ||||||
| Transport shock according to DIN EN 60068-2-27 |
▶Without damping plate | 15 g/11 ms /3 shocks /3 axes | |||||
| ▶With damping plate 1) | 15 g/11 ms /3 shocks /3 axes | ||||||
| Shock according to DIN EN 60068-2-27 | ▶With damping plate 1) | 35 g/6 ms /1000 shocks /3 axes | |||||
| Weight | kg | 9 | 12 | 19 | 21 | 80 | |
| Maximum relative humidity (no condensation) | ％ | 95 | |||||
| Maximum solenoid surface temperature | ℃ | 120 (individual operation) | |||||
| MTTFa value according to EN ISO 13849 | years | 75 (for further details see data sheet 08012) | |||||
| Conformity | ▶CE according to EMC directive 2014/30/EU, tested according to EN 61000-6-2 and EN 61000-6-3 ▶RoHS directive 2015/65/EU ▶REACH ordinance (EC) no. 1907/2006 |
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1)Not recommended for applications with mainly low-frequency excitation < 300 Hz
Hydraulic
| Size | NG | 10 | 16 | 25 | 27 | 35 | ||||||
| Maximum operating pressure |
▶Ports A, B, P | |||||||||||
| - External pilot oil supply | bar | 350 | 270 | 350 | ||||||||
| - Internal pilot oil supply | bar | 280 | 270 | 280 | ||||||||
| ▶Port X | bar | 280 | 270 | 280 | ||||||||
| ▶Ports T, Y | bar | 250 | 210 | 250 | ||||||||
| Minimum pilot pressure (pilot control valve) | bar | 10 | ||||||||||
| Maximum flow | l/min | 300 | 800 | 1250 | 1850 | 4700 | ||||||
| Rated flow (Δp = 5 bar/control edge) 2) | l/min | 60/100 | 200/250 | 350/400 | 430/600 | 1000/1200/1500 | ||||||
| Pilot oil flow3) | ▶Symbol E, W | l/min | 2.4 | 3.5 | 7.5 | 23 | ||||||
| ▶Symbol V, Q3- | l/min | 4.5 | 11.5 | 22 | 29 | |||||||
| Maximum leakage flow (inlet pressure 100 bar) |
▶Symbol E, E1- - Main valve |
l/min | 0.06 | 0.13 | 0.17 | 0.61 | ||||||
| - Main valve + pilot control valve | l/min | 0.14 | 0.28 | 0.42 | 1.01 | |||||||
| ▶Symbol w6-, W8- - Main valve |
l/min | 0.12 | 0.26 | 0.35 | 1.23 | |||||||
| - Main valve + pilot control valve | l/min | 0.2 | 0.41 | 0.6 | 1.63 | |||||||
| Maximum zero flow (inlet pressure 100 bar) |
▶Symbol V, V1- - Main valve |
l/min | 1.7 | 2.3 | 2.8 | 3.3 | 7.2 | |||||
| - Main valve + pilot control valve | l/min | 1.85 | 2.6 | 3.2 | 3.7 | 7.65 | ||||||
| ▶Symbol Q3- - Main valve |
l/min | 0.4 | 1.6 | 1.8 | 2.2 | 1.6 | ||||||
| - Main valve + pilot control valve | l/min | 0.55 | 1.9 | 2.2 | 2.6 | 2.05 | ||||||
| Flow unloading central position Δp = 5 bar/control edge | A→T | B→T | A→T | B→T | A→T | B→T | A→T | B→T | A→T | B→T | ||
| ▶Symbol W6- | l/min | 2.8 | 2.8 | 4 | 4 | 6 | 6 | 6 | 6 | 25 | 25 | |
| ▶Symbol W8- | l/min | 2.8 | 1.4 | 4 | 2 | 6 | 3 | 6 | 3 | 25 | 12.5 | |
| Pilot oil volume | 0...100% | cm3 | 1.3 | 2.9 | 6.8 | 6.8 | 33..2 | |||||
| Hydraulic fluid | See table | |||||||||||
| Viscosity range | ▶Recommended | mm2/s | 20...100 | |||||||||
| ▶Maximum | mm2/s | 10...800 | ||||||||||
| Hydraulic fluid temperature range (flown-through) | ℃ | -20...+70 | ||||||||||
| Maximum admissible degree of contamination of the hydraulic fluid; cleanliness class according to ISO 4406 (c) | Class 18/16/134) | |||||||||||
2)Flow for deviating Δp (control edge):qx=qVnom×√(Δpx/5)
3)At port X and Y with stepped input signal from 0 ... 100% (pilot pressure 100 bar)
4)The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components.
| Hydraulic fluid | Classification | Suitable sealing materials | Standards | Data sheet | |
| Mineral oils | HL,HLP | NBR,FKM | DIN 51524 | 90220 | |
| Bio-degradable | ▶Insoluble in water | HETG | FKM | ISO 15380 | 90221 |
| HEES | FKM | ||||
| ▶Soluble in water | HEPG | FKM | ISO 15380 | ||
| Flame-resistant | ▶Water-free | HFDU(glycol base) | FKM | ISO 12922 | 90222 |
| HFDU(ester base) | FKM | ||||
| HFDR | FKM | ||||
| ▶Containing water | HFC (Fuchs: Hydrotherm 46M, Renosafe 500; Petrofer: Ultra Safe 620; Houghton: Safe 620; Union: Carbide HP5046) | NBR | ISO 12922 | 90223 | |
| Important notices on hydraulic fluids: ▶For further information and data on the use of other hydraulic fluids, please refer to the data sheets above or contact us. ▶There may be limitations regarding the technical valve data(temperature, pressure range, life cycle, maintenance intervals,etc.). ▶The ignition temperature of the hydraulic fluid used must be 50 K higher than the maximum surface temperature. ▶Bio-degradable and flame-resistant-containing water: If components with galvanic zinc coating(e.g. version "J3" or "J5")or parts containing zinc are used, small amounts of dissolved zinc may get into the hydraulic system and cause accelerated aging of the hydraulic fluid. Zinc soap may form as a chemical reaction product, which may clog filters,nozzles and solenoid valves - particularly in connection with local heat in put. ▶Flame-resistant-containing water: －Due to the increased cavitation tendency with HFC hydraulic fluids, the life cycle of the component may be reduced by up to 30 % as compared to the use with mineral oil HLP. In order to reduce the cavitation effect, it is recommended .if possible specific to the installation · to back up the return flow pressure in ports T to approx. 20 % of the pressure differential at the component. －Dependent on the hydraulic fluid used, the maximum ambient and hydraulic fluid temperature must not exceed 50 ℃.In order to reduce the heat input into the component, the command value profile is to be adjusted for proportional and high-response valves. |
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Static/dynamic
| Size | NG | 10 | 16 | 25 | 27 | 35 | |
| Hysteresis | % | <0.1 | |||||
| Response sensitivity | % | <0.05 | |||||
| Range of inversion | % | <0.08 | |||||
| Manufacturing tolerance qVmax | % | ≤10 | |||||
| Actuating time for 0 ... 100% at X=210 bar | ▶Symbols E, E1-, W6-, W8. | ms | 25 | 37 | 36 | 36 | 55 |
| Switch-off behavior(after electricshut-off) | ▶Symbols E,E1-, W6-, W8- | Pilot control valve in fail-safe position, main valve movesto overlapped spring-centered central position | |||||
| ▶Symbol V, V1- | Pilot control valve in fail-safe position, main valve moves to spring-centered "offset position" (approx.6%, P→B/A→T) | ||||||
| ▶Symbol Q3 | Pilot control valve in fail-safe position, main valve moves to spring-centered "offset position" (P blocked, A/B to port T open) | ||||||
| Temperature drift (temperature range 20℃ ... 80℃) | %/10℃ | Zero shift <0.25 | |||||
| Zero compensation | Ex plant +1% |
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Electrical,integrated electronics (OBE)- Interface “A1” and “F1”
| Relative duty cycle | % | 100(continuous operation) | |
| Protection class according to EN 60529 | IP 65 with mounted and locked plug-in connectors | ||
| Supply voltage | VDC | 24 | |
| ▶Terminal A | VDC | min.19/max.36 | |
| ▶Terminal B | VDC | 0 | |
| Maximum admissible residual ripple | Vpp | 2.5 | |
| Maximum power consumption | VA | 40 | |
| Fuse protection, external | AT | 2.5 (time-lag) | |
| Input, version "A1" | Differential amplifier, Ri= 100 kΩ | ||
| ▶Terminal D (UE) | VDC | 0...±10 | |
| ▶Terminal E | VDC | 0 | |
| Input, version "F1" | Load,Rsh=200Ω | ||
| ▶Terminal D (ID-E) | mA | 4...20 | |
| ▶Terminal E (ID-E) | Current loop ID-E feedback | ||
| Maximum voltage of the differential inputs against 0 V | D→B;E→B(max.18 V) | ||
| Test signal, version "A1" | LVDT | ||
| ▶Terminal F(UTest) | V | 0 ... ±10 | |
| ▶Terminal C | Reference 0 V | ||
| Test signal, version "F1" | LVDT signal 4 .. 20 mA on external load 200 ... 500 0 maximum | ||
| ▶Terminal F(IF-C) | mA | 4...20 | |
| ▶Terminal C(IF-C) | Current loop IF-C feedback | ||
| Functional ground and screening | (EMC-compliant installation) | ||
| Adjustment | Calibrated in the plant, see valve characteristic curves | ||
Electrical,integrated electronics(OBE)-Interface “L1”
| Relative duty cycle | % | 100(continuous operation) | |
| Protection class according to EN 60529 | IP 65 with mounted and locked plug-in connectors | ||
| Supply voltage | ▶Valve amplifier | VDC | 24 |
| - Pin 2 | VDC | min.18/max.30 | |
| - Pin 5 | VDC | 0 | |
| ▶IO-Link interface | VDC | 24 | |
| - Pin 1 | VDC | min.18/max.30 | |
| - Pin 3 | VDC | 0 | |
| Maximum current consumption | ▶Valve amplifier | A | 2 |
| ▶IO-Link interface | mA | 50 | |
| Maximum residual ripple | Vpp | 1.3 | |
| Maximum current consumption | mA | 50 | |
| Minimum process cycle time | ms | 0.6 | |
| Bit rate COM3 | kBaud (kbit/s) | 230.4 | |
| Required master port class | Class B | ||
| Resolution | ▶A/D transformer | bit | 12 (110% valve opening) |
| ▶D/A transformer | bit | 12 (110% valve opening) | |
| Functionalground | Provide via valve block | ||
| Adjustment | Calibrated in the plant | ||
| Directive | 10-Link Interface and System Specification Version 1.1.2 | ||
Electrical,integrated control electronics (OBE)- Interface “C6”
| Relative duty cycle | % | 100(continuous operation) | |
| Protection class according to EN 60529 | IP 65 with mounted and locked plug-in connectors | ||
| Supply voltage | VDC | 24 | |
| ▶Terminal A | VDC | min.19/max.36 | |
| ▶Terminal B | VDC | 0 | |
| Maximum admissible residual ripple | Vpp | 2.5 | |
| Maximum power consumption | VA | 40 | |
| Fuse protection, external | AT | 2.5 (time-lag) | |
| Input | Load, Rsh=200Ω | ||
| ▶Terminal D (ID-E) | mA | 0...±10 | |
| ▶Terminal E (ID-E) | Current loop ID-E feedback | ||
| Test signal | LVDT signal 4 ... 20 mA on external load 200 ... 500Ω maximum | ||
| ▶Terminal F(IF-B) | mA | 4 ... 20 | |
| ▶Terminal B(IF-B) | Current loop lrsfeedback | ||
| Functional ground and screening | (EMC-compliant installation) | ||
| Adjustment | Calibrated in the plant, see valve characteristic curves | ||