Артикул: RX7415
Directional spool valves, pilot operated, with hydraulic or electro-hydraulic actuation WEH, WH...6H
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Description
- Size 16 … 25
- Component series 1X
- Maximum operating pressure 350 bar
- Maximum flow 650 l/min
Features
- 4/3, 4/2 directional design
- Types of actuation (internal or external pilot control):
– Electro-hydraulic (type WEH)
– Hydraulic (type WH) - For subplate mounting
- Porting pattern according to ISO 4401
- Spring centering, spring end position
- DC solenoid
- Electrical connection as individual connection
- Manual override
Product description
Type WEH
The valve type WEH is a directional spool valve with electro-hydraulic actuation. It controls the start, stop and direction of a flow.
The directional valve basically consists of the main valve with housing (1), the main control spool (2), one or two return springs (3.1) and (3.2), as well as the pilot control valve (4) with one or two solenoids "a" (5.1) and/or "b" (5.2).
The main control spool (2) in the main valve is held in the zero or initial position by the springs or by means of pressurization. In the initial position, the two spring chambers (6) and (8) are connected with the tank in a depressurized form via the pilot control valve (4). Via the control line (7), the pilot control valve is supplied with pilot oil. Supply can be implemented internally or externally (externally via port X). Upon actuation of the pilot control valve, e.g. solenoid "a", the pilot control spool (10) is moved to the left and thus, the spring chamber (8) is pressurized with pilot pressure. The spring chamber (6) remains depressurized.
The pilot pressure acts on the left side of the main control spool (2) and moves it against the spring (3.1). This connects port P with B and A with T in the main valve.
On switching off of solenoid, the pilot control spool (10) returns to its initial position. The spring chamber (8) is unloaded to the tank.
The pilot oil return is implemented internally (via channel T) or externally (via channel Y).
An optional manual override (9) allows for moving of the pilot control spool (10) without solenoid energization.
Notice:
The return springs (3.1) and (3.2) in the spring chambers (6) and (8) hold the main control spool (2) in central position without pilot pressure even with, for example, vertical valve positioning.
Due to the design principle, internal leakage is inherent to the valves, which may increase over the life cycle.
Type WH
Valve type WH is a directional spool valve with hydraulic actuation. It controls the start, stop and direction of a flow.
The directional valve basically consists of the valve housing (1), the main control spool (2), one or two return springs (3.1) and (3.2) at valves with spring return or spring centering as well as the diversion plate (11).
The main control spool (2) is actuated directly by pressurization.
The main control spool (2) is held in zero or initial position by springs or pressurization. Pilot oil supply and return are external (see page 9).
4/3 directional valve with spring centering of the control spool
With this version, the main control spool (2) is held in zero position by two return springs (3.1) and (3.2). Via the diversion plate (11), the spring chamber (6) is connected to port Y, the spring chamber (8) to port X.
With pilot pressure loading of one of the two front sides of the main control spool (2), the spool is moved to the spool position. In the valve, the required ports are connected in this way.
The spring on the opposite side returns the spool to the zero or initial position at pressure relief of the pressurized control spool area.
Pilot oil supply (schematic illustration)
| 1 | Plug screw M6 according to DIN 906, wrench size 3 - Pilot oil return |
| 2 | Plug screw M6 according to DIN 906, wrench size 3 - Pilot oil supply |
| Pilot oil supply | Pilot oil return | ||
| External | 2 closed | External | 1 closed |
| Internal | 2 open | Internal | 1 open |
Type WH…
The pilot oil supply and return is implemented externally via channel X and Y.
Type WEH...
The pilot oil supply is implemented externally - via channel X - from a separate pressure supply.
The pilot oil return is implemented externally via the Y channel into the tank.
Type WEH…E…
The pilot oil supply is implemented internally from channel P of the main valve. (see Technical data)
The pilot oil return is implemented externally via the Y channel into the tank. In the subplate, port X is closed.
Type WEH…ET…
The pilot oil supply is implemented internally from channel P of the main valve.
The pilot oil return is implemented internally via the channel T into the tank. In the subplate, ports X and Y are closed.
Type WEH…T…
The pilot oil supply is implemented externally - via channel X - from a separate pressure supply.
The pilot oil return is implemented internally via the channel T into the tank. In the subplate, port Y is closed.
Notices:
The modification of the pilot oil supply may only be performed by authorized specialists or at the factory.
- Pilot oil supply X or return Y external:
- The maximum admissible operating parameters of the pilot control valve must be observed (see data sheet 23164).
- Maximum pilot pressure: please observe the "Technical data".
- Pilot oil supply internal (version "ET" and "E"):
- Minimum pilot pressure: please observe the "Technical data".
- In order to prevent inadmissibly high pressure peaks, a "B10" throttleinsert has to be provided in port P of the pilot control valve (see above).
Throttle insert
Use of the throttle insert (3) is necessary if the pilot oil supply in channel P of the pilot control valve is to be limited (see below). The throttle insert (3) is inserted in channel P of the pilot control valve.
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | ||
| 4 | 1X | / | 6H | G24 | N9 | K4 | / |
| 01 | 4-way version | 4 |
| Types of actuation | ||
| 02 | Electro-hydraulic | WEH |
| Hydraulic | WH 1) | |
| Size | ||
| 03 | NG16 | 16 |
| NG25 | 25 | |
| 04 | Symbols; for the possible version, see "Symbols/Circuit diagrams" | |
| 05 | Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) | 1X |
| Pilot control valve | ||
| 06 | Pilot control valve (data sheet 23164) | 6H |
| 07 | Direct voltage 24 V | G24 |
| 08 | With concealed manual override | N9 |
| Pilot oil flow | ||
| 09 | External pilot oil supply, external pilot oil return 2) | no code |
| Internal pilot oil supply, external pilot oil return 2); 3); 4) | E | |
| Pilot oil supply internal, pilot oil return internal 2); 4) | ET | |
| External pilot oil supply, internal pilot oil return 2) | T | |
| Electrical connection | ||
| 10 | Individual connection | |
| Without mating connector; connector DIN EN 175301-803 | K4 5) | |
| Throttle insert | ||
| 11 | Without throttle insert (only for external pilot oil supply) | no code |
| Throttle Ø 1.0 mm | B10 | |
| 1) | Only NG25 |
| 2) | Pilot oil supply X or return Y external: - The maximum admissible operating parameters of the pilot control valve must be observed (see data sheet 23164). - Minimum pilot pressure: please observe the "Technical data". - Maximum pilot pressure: please observe the "Technical data". |
| 3) | Pilot oil supply internal (version “ET” and “E”): This selection reduces the maximum operating pressure to the maximum pilot pressure. - Minimum pilot pressure: please observe the "Technical data". - Maximum pilot pressure: please observe the "Technical data". - In order to prevent inadmissibly high pressure peaks, a "B10" throttle insert has to be provided in port P of the pilot control valve (see "Product description"). |
| 4) | Not for connection P to T in zero position. |
| 5) | Mating connectors, separate order, see data sheet 23164 |
Technical data
general
| Size | 16 | 25 | ||
| Installation position | Any; with suspended installation, higher sensitivity to contamination – horizontal is recommended. | |||
| Weight (approx.) | Valve with one solenoid | kg | 7.5 | 12.6 |
| Valve with two solenoids, spring-centered | kg | 7.8 | 12.9 | |
| Ambient temperature range | °C | -20 … +50 | ||
| Surface protection | Valve body | Coating, layer thickness max. 100 μm | ||
| MTTFD values according to EN ISO 13849 1) | WEH | Years | 100 | |
| WH | Years | 150 | ||
| 1) | For further details, see data sheet 08012 |
hydraulic
| Size | 16 | 25 | |||
| Maximum operating pressure | Port P | bar | 350 | ||
| Port A | bar | 350 | |||
| Port B | bar | 350 | |||
| Port T | External pilot oil return Y | bar | 350 | 315 | |
| Internal pilot oil return Y | bar | 160 | |||
| Port Y | Pilot oil return, external | bar | 160 | ||
| Hydraulic fluid | see table "Hydraulic fluid" | ||||
| Hydraulic fluid temperature range | °C | -20 … +80 | |||
| Viscosity range | mm²/s | 2.8 … 500 | |||
| Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1) | Class 20/18/15 | ||||
| Maximum pilot pressure | Without orifice | bar | 315 | 260 | |
| Minimum pilot pressure | External pilot oil supply X (all symbols), internal pilot oil supply (only symbols D, E, J, L, U, Y31) | 3-spool position valve, spring-centered | bar | 14 | 12 |
| 2-spool position valve with spring end position | bar | 14 | 12 | ||
| Pilot volume for switching process | 3-spool position valve, spring-centered | cm³ | 5.2 | 11.7 | |
| 2-spool position valve | cm³ | 10.3 | 23.4 | ||
| Pilot flow for shortest switching time, approx. | l/min | 35 | |||
| 1) | 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, HLPD, HVLP, HVLPD | NBR | DIN 51524 | 90220 |
| Important information on hydraulic fluids:
| ||||
Switching times
| Pilot pressure | Symbols | bar | 70 | 250 | Spring | |
| ON | OFF | |||||
| NG16 | Without throttle insert | D, Y31, E, E42, L, U, J | ms | 50 ... 80 | 40 ... 100 | 40 ... 50 |
| With throttle insert | D, Y31, E, E42, L, U, J | ms | 100 ... 160 | 80 ... 100 | 40 ... 50 | |
| NG25 | Without throttle insert | ms | 70 ... 100 | 50 … 70 | 100 ... 130 | |
| With throttle insert | ms | 200 ... 280 | 120 … 170 | 180 ... 400 | ||
Notices:
- Switching time = contacting at the pilot control valve until start of opening of the control edge in the main valve and change in the control spool stroke by 95 %
- The switching times are measured according to ISO 6403 with HLP46, ϑoil = 40 °C ±5 °C.
With different hydraulic fluid temperatures, variations may occur.
- The switching times were determined using DC solenoids.
- The shut-off of the solenoids creates voltage peaks, which can be reduced by the use of suitable diodes.
- The switching times have been determined under ideal conditions and may differ in the system, depending on the application conditions.
(For applications outside these values, please consult us!)
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
Size 16
Δp-qV characteristic curves
| Symbol | Spool position | |||
| P –A | P – B | A – T | B – T | |
| D | 1 | 1 | 1 | 2 |
| E | 1 | 1 | 1 | 2 |
| E42 | 4 | 4 | 3 | 5 |
| J | 1 | 1 | 1 | 2 |
| L | 1 | 1 | 1 | 2 |
| U | 1 | 1 | 1 | 2 |
| Y31 | 1 | 1 | 1 | 2 |
Size 25
Δp-qV characteristic curves
| Symbol | Spool position | ||||
| P – A | P – B | A – T | B – T | P – T | |
| D | 1 | 1 | 2 | 4 | – |
| E | 1 | 1 | 2 | 5 | – |
| G | 3 | 3 | 4 | 6 | – |
| J | 1 | 1 | 3 | 5 | – |
| L | 1 | 1 | 3 | 4 | – |
| U | 1 | 1 | 2 | 5 | – |
| Y31 | 1 | 1 | 3 | 5 | – |
Performance limits
(measured with HLP46, ϑOil = 40 ±5 °C)
Notice:
The specified performance limits are valid for operation with two directions of flow (e.g. from P to A and simultaneous return flow from B to T).
Due to the flow forces acting within the valves, the possible performance limit may be considerably lower with only one direction of flow (e.g. from P to A while port B is blocked).
The performance limits were determined when the solenoids were at operating temperature, at 10% undervoltage and without tank preloading.
| Size | Characteristic curves | Symbol |
| 16 | 1 | D, E, E42, J, L, U, Y31 |
| 25 | 1 | D, E, J, L, U, Y31 |
| 2 | G |
Symbols/Circuit diagrams
2 spool positions
| Ordering code | Type of actuation | ||
| Symbol | Spool return | Type WH (hydraulic) | Type WEH (electro-hydraulic) |
| D | ../.. |  |  |
| Y31 | ../.. |  |  |
| 1) | Only for NG10 and 25 ("W.H 22") with 3/2-way version; if operating pressure > tank pressure, port T is to be used as a leakage port. |
Valve with spring end position
| WEH…/..  | WEH…/…E…  |
| WEH…/…ET…  | WEH…/…T…  |
3 spool positions
| 1) | Example: Symbol E with spool position "a" → ordering code ..EA.. |
| Ordering code | Type of actuation | |||
| Symbol | Actuating side | Spool return | Type WH (hydraulic) | Type WEH (electro-hydraulic) |
| E, G, J, L, U | – | ../.. |  |  |
| .A | – | – |  | |
| .B | – | – |  | |
Valve with spring-centered zero position
| WEH…/..  | WEH…/…E…  |
| WEH…/…ET…  | WEH…/…T…  |
Dimensions
Size 16
Dimensions in mm
 Required surface quality of the valve contact surface |
| 1 | Main valve |
| 2 | Pilot control valve type 4WE 6 … (data sheet 23164): |
| 2.1 | Plug screw "b" and solenoid "a" for main valves with symbol D, EA, LA, etc. |
| 2.2 | Plug screw "a" and solenoid "b" for main valves with symbol Y31, EB, LB, etc. |
| 2.3 | 2 solenoids for main valves with 3 spool positions |
| 3.1 | Solenoid “a” |
| 3.2 | Solenoid "b" |
| 4 | Solenoid with manual override |
| 5 | Machined valve contact surface; porting pattern according to ISO 4401-07-07-0-05 |
| 6 | Name plate pilot control valve |
| 7 | Name plate complete valve |
| 8 | Seal rings |
| 9 | Space required to remove the mating connector |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
Valve mounting screws (separate order)
| Size | Quantity | Hexagon socket head cap screws | Material number |
| 16 | 4 | ISO 4762 - M10 x 45 - 10.9-flZn/nc/480h/C (Friction coefficient μtotal = 0.09 … 0.14) Tightening torque MA = 58 Nm ±20 % | R913015578 |
| 2 | ISO 4762 - M6 x 45 - 10.9-flZn-240h-L (Friction coefficient μtotal = 0.09 … 0.14) Tightening torque MA = 12.5 Nm ±10 % | R913000258 | |
| or | |||
| 4 | UNC 3/8-16 UNC x 1 3/4” ASTM-A574 | Not included in the Rexroth delivery range | |
| 2 | UNC 1/4-20 UNC x 1 3/4” ASTM-A574 | ||
Subplates (separate order) with porting pattern according to ISO 4401-07-07-0-05, see data sheet 45100.
Size 25
Dimensions in mm
 Required surface quality of the valve contact surface |
| 1 | Main valve |
| 2 | Pilot control valve type 4WE 6 … (data sheet 23164): |
| 2.1 | Plug screw "b" and solenoid "a" for main valves with symbol D, EA, LA, etc. |
| 2.2 | Plug screw "a" and solenoid "b" for main valves with symbol Y31, EB, LB, etc. |
| 2.3 | 2 solenoids for main valves with 3 spool positions |
| 3.1 | Solenoid “a” |
| 3.2 | Solenoid "b" |
| 4 | Solenoid with manual override |
| 5 | Machined valve contact surface; porting pattern according to ISO 4401-08-08-0-05 |
| 6 | Name plate pilot control valve |
| 7 | Name plate complete valve |
| 8 | Seal rings |
| 9 | Space required to remove the mating connector |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
Valve mounting screws (separate order)
| Size | Quantity | Hexagon socket head cap screws | Material number |
| 25 | 6 | ISO 4762 - M12 x 50 - 10.9-flZn-240h-L (Friction coefficient μtotal = 0.09 … 0.14) Tightening torque MA = 100 Nm ±10 % | R913000283 |
| or | |||
| 6 | UNC 1/2-13 UNC x 2” ASTM-A574 | Not included in the Rexroth delivery range | |
Subplates (separate order) with porting pattern according to ISO 4401-08-08-0-05, see data sheet 45100.
Accessories
Mating connectors for valves with connector “K4”, without circuitry, standard
3P Z4
Mating connectors for valves with connector “K4”, without circuitry, standard
3P Z4
- For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector”
- Mating connectors for valves with one or two solenoids (individual connection)
Mating connectors for valves with connector “K4”, with indicator light
3P Z5L
Mating connectors for valves with connector “K4”, with indicator light
3P Z5L
- For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector”
- Mating connectors for valves with one or two solenoids (individual connection)
Mating connectors for valves with connector “K4”, with rectifier
3P RZ5
Mating connectors for valves with connector “K4”, with rectifier
3P RZ5
- For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector”
- Mating connectors for valves with one or two solenoids (individual connection)
Mating connectors for valves with connector “K4”, with indicator light and Zener diode suppression circuit
3P Z5L1
Mating connectors for valves with connector “K4”, with indicator light and Zener diode suppression circuit
3P Z5L1
- For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector”
- Mating connectors for valves with one or two solenoids (individual connection)
Ordering codes
Downloads
 | Directional spool valves, pilot-operated, with electro-hydraulic or hydraulic actuation Data Sheet | RE24718 | 2021-08-01 | English | PDF | 823k Product Groups: Directional spool valves Type WEH and WH |
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