4WEH hydraulic directional valve
3/2,4/2 and 4/3 directional valves,internally pilot operated, externally pilot operated
Sizes 10 to 32
4WEH type
RE 24751/08.08
Replaces:02.03
Component series 6X
Maximum operating pressure 350 bar [5076 psi]
Maximum flow 1100 L/min [290 US gpm]
Features
– Rexroth 4WEH Electro Hydraulic Operated Directional Control Valves can be used to control open &close the direction of fluid flow.
– Electro-hydraulic operation (WEH), hydraulic operation (WH)
– WEH Electro Hydraulic Rexroth Valves For sub-plate mounting
– Spring or pressure-centred,spring or hydraulic offset
– Wet-pin DC or AC solenoids, optional
– Electro-Hydraulic Control Valves Manual override, optional
– Electrical connection as individual or central connection
– Shifting time adjustment, optional
– Pre-load valve in P-channel of main valve is optional
– Data sheet with Auxiliary equipment
4WEH directional valve can be applied on Plastic Injection machine and hydraulic power,working pressure of Pilot Operated Electro-hydraulic Directional Valve is high and flow is large.As you know,common solenoid directional valve flow can not satisfy large flow hydraulic system,the best choice is 4WEH Rexroth directional valve.If you have any question,please email sales@best-hydraulic.com or call us 86-574-87454979,thanks!
Spool symbols: 2 spool positions
1)Only for NG10 and 25 (4WH 22)
If operating pressure > tank pressure, port T must be used as leakage port!
2)Example:
Symbol E with actuating side “a” → ordering code ..EA
3)Spool symbol S for NG16 only
Spool symbols: 3 spool positions
Symbols for valves with 2 spool positions
Symbols for 4WEH Rexroth valves with 2 spool positions
Symbols for Rexroth 4WEH valves with 3 spool positions
Symbols for valves with 3 spool positions
Free flow cross-sections in zero position with spool Q,V and W
| Size | NG | 10 | 16 | 25 4W.H 22 | 25 4W.H 25 | 32 | |
|---|---|---|---|---|---|---|---|
| Spool Q | A - T;B - T | mm2[inch2] | 13[0.02] | 32[0.05] | 78[0.121] | 83[0.129] | 78[0.121] |
| Spool V | P - A;P - B | mm2[inch2] | 13[0.02] | 32[0.05] | 73[0.113] | 83[0.129] | 73[0.113] |
| A - T;B - T | mm2[inch2] | 13[0.02] | 32[0.05] | 84[0.13] | 83[0.129] | 84[0.13] | |
| Spool W | A - T;B - T | mm2[inch2] | 2.4[0.004] | 6[0.009] | 10[0.015] | 14[0.022] | 20[0.031] |
Characteristic curves(measured with HLP46,θoil = 40℃±5℃ [104℉ ± 9℉]
At a higher tank pressure the minimum pilot pressure must be raised in accordance with this diagram.
Characteristic curves NG10 (measured with HLP46,θoil = 40℃±5℃ [104℉ ± 9℉])
| Spool | Spool position | Spool | Zero position | |||||
|---|---|---|---|---|---|---|---|---|
| P - A | P - B | A - T | B - T | A - T | B - T | P - T | ||
| E,Y,D | 2 | 2 | 4 | 5 | ||||
| F | 1 | 4 | 1 | 4 | F | 3 | - | 6 |
| G,T | 4 | 2 | 2 | 6 | G,T | - | - | 7 |
| H,C | 4 | 4 | 1 | 4 | H | 1 | 3 | 5 |
| J,K | 1 | 2 | 1 | 3 | ||||
| L | 2 | 3 | 1 | 4 | L | 3 | - | - |
| M | 4 | 4 | 3 | 4 | ||||
| P | 4 | 1 | 3 | 4 | P | - | 7 | 5 |
| Q,V,W,Z | 2 | 2 | 3 | 5 | ||||
| R | 2 | 2 | 3 | - | ||||
| U | 3 | 3 | 3 | 4 | U | - | 4 | - |
| A,B | 2 | 2 | - | - | ||||
Characteristic curves: NG16 (measured with HLP46,θoil = 40℃±5℃ [104℉ ± 9℉])
Performance limits: NG16 (measured with HLP46,θoil = 40℃±5℃ [104℉ ± 9℉])
| 2 positon valves - qv max in L/min [US gpm] | |||||
|---|---|---|---|---|---|
| Spool | operating pressure pmax in bar[psi] | ||||
| 70[1015] | 140[2030] | 210[3046] | 280[4061] | 350[5076] | |
| X external - spring end position in main valve (at pst min = 12 bar[174 psi]) | |||||
| C,D,K,Y,Z | 300[79] | 300[79] | 300[79] | 300[79] | 300[79] |
| X external - spring end position in main valve 1) | |||||
| C | 300[79] | 300[79] | 300[79] | 300[79] | 300[79] |
| D,Y | 300[79] | 270[71] | 260[68] | 250[66] | 230[60] |
| K | 300[79] | 250[66] | 240[63] | 230[60] | 210[55] |
| Z | 300[79] | 260[68] | 190[50] | 180[47] | 160[42] |
| X external - hydraulic end position in main valve | |||||
| HC,HD,HK,HZ,HY | 300[79] | 300[79] | 300[79] | 300[79] | 300[79] |
| 3 positon valves - qv max in L/min [US gpm] | |||||
|---|---|---|---|---|---|
| Spool | operating pressure pmax in bar[psi] | ||||
| 70[1015] | 140[2030] | 210[3046] | 280[4061] | 350[5076] | |
| X external - spring-centered | |||||
| E,H,J,L,M,Q,U,W,R | 300[79] | 300[79] | 300[79] | 300[79] | 300[79] |
| F,P | 300[79] | 250[66] | 180[47] | 170[45] | 150[39] |
| G,T | 300[79] | 300[79] | 240[63] | 210[55] | 190[50] |
| S | 300[79] | 300[79] | 300[79] | 250[66] | 220[58] |
| V | 300[79] | 250[66] | 210[55] | 200[53] | 180[47] |
| X external - pressure-centered (at minimum pilot pressure of 16 bar [232 psi] | |||||
| All spools 2) | 300[79] | 300[79] | 300[79] | 300[79] | 300[79] |
Attention!
1)When the specified flow values are exceeded, the function of the return springs can no longer be guaranteed in the event of a pilot pressure failure!
2)With spool V, the pilot valve is not required in the case of flows > 160 L/min [42 US gpm].
Characteristic curves: NG25 (type W.H 22)
(measured with HLP46,θoil = 40℃±5℃ [104℉ ± 9℉])
| Spool | Spool position | Spool | Zero position | ||||||
|---|---|---|---|---|---|---|---|---|---|
| P - A | P - B | A - T | B - T | B - A | A - T | B - T | P - T | ||
| E,M,P,Q,U,V,Z,C | 2 | 2 | 1 | 4 | - | F | - | - | 4 |
| F | 1 | 2 | 1 | 2 | - | G,P | - | - | 6 |
| G,T | 2 | 2 | 2 | 4 | - | H | - | - | 2 |
| H,J,W,K,D | 2 | 2 | 1 | 3 | - | L | 4 | - | - |
| L | 2 | 2 | 1 | 2 | - | T | - | - | 5 |
| R | 1 | 2 | 1 | - | 5 | U | - | 6 | - |
| A,B | 2 | 2 | - | - | - | ||||
Characteristic curves: NG25 (type W.H 25)
(measured with HLP46,θoil = 40℃±5℃ [104℉ ± 9℉])
| Spool | Spool position | Spool | Spool position | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| P - A | P - B | A - T | B - T | P - A | P - B | A - T | B - T | B - A | ||
| E,C | 1 | 1 | 1 | 3 | P | 4 | 1 | 1 | 5 | - |
| F | 1 | 4 | 3 | 3 | R | 2 | 1 | 1 | - | 8 |
| G | 3 | 1 | 2 | 4 | U | 4 | 1 | 1 | 6 | - |
| H,D | 4 | 4 | 3 | 4 | V,Z | 2 | 4 | 3 | 6 | - |
| J,Q,K | 2 | 2 | 3 | 5 | W | 1 | 1 | 1 | 3 | - |
| L | 2 | 2 | 3 | 3 | T | 3 | 1 | 2 | 4 | - |
| M | 4 | 4 | 1 | 4 | ||||||
7 Spool G, central position P – T
8 Spool T, central position P – T
Characteristic curves: NG32 (measured with HLP46,θoil = 40℃±5℃ [104℉ ± 9℉])
WE-H10 Outline and installation dimensions
WE-H16 Outline and installation dimensions
WE-H25 Outline and installation dimensions
WE-H32 Outline and installation dimensions
4WEH Rexroth hydraulic solenoid valve related article – Disadvantages of hydraulic directional control valve
1.Regulation accuracy is limited.
Rexroth 4WEHhydraulic solenoid valve is usually only switch two kinds of state, the valve core can only be in the two limit position, can not be adjusted continuously. A lot of new ideas to break through, but still in the trial stage, so the adjustment accuracy is also subject to certain restrictions.
2.Flow medium
The 4WEH Rexroth hydraulic solenoid valve on the media have high requirements for cleanliness, including granular media can not be applied, if must first filter out impurities.In addition, the viscous medium can not be applied, and the specific product is suitable for the medium viscosity range is relatively narrow. But some of these shortcomings can be avoided by selecting.