PROPORTIONAL DIRECTIONAL VALVE 4WRZE10W8-85-7X/6EG24EK31/A1M
Manufacturer: Bosch Rexroth
Material #: R900974754
Model : 4WRZE10W8-85-7X/6EG24EK31/A1M
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth 4WRZE10W8-85-7X/6EG24EK31/A1M (R900974754) is a high-performance industrial hydraulic valve specifically designed for reliable control of oil flow direction based on the hydraulic spool valve pilot-operated with internal pilot oil supply and external return. It does not include a pressure-reducing valve and features the spool symbol W. This valve offers maximum pressure capabilities, with an electrical connection via a connector pole PE according to EN. The product group is identifiable by its unique ID number, and it includes multiple ports for connectivity.
The actuation of this valve is electrical with integrated electronics, suitable for subplate mounting with a connection diagram that adheres to NFPA T..R D SizeCETOP D standards as well as ISO specifications. The nominal flow rate is designed to meet demanding applications, while the supply voltage requirement is set at VDC. This model has a specified number of switching positions and weighs . kg, ensuring robust performance in various settings. It utilizes NBR seals and supports analog connectivity with a command value input range of V.
This Bosch Rexroth valve operates using hydraulic fluids such as HL, HLP, HLPD, HVLP, HVLPD, and HFC. Its design includes pilot-operated proportional directional valves type WRZE which are actuated by proportional solenoids to control both flow direction and size efficiently. The setup comprises a pilot control valve with proportional solenoids alongside a main valve that contains the main control spool and centering spring.
In operation, de-energized solenoids allow the main control spool to remain in a central position due to the centering spring's force. When activated by an electric input signal, the pilot control valve directs pilot oil into the pressure chamber which proportionally moves the main control spool. This movement allows for controlled flow between ports P-A and B-T or P-B and A-T R depending on the spool's position. An optional manual override feature provides additional functionality but requires caution due to potential uncontrolled machine movements.
The design principle acknowledges that internal leakage may increase over time inherent to these valves' life cycle—an important consideration for maintenance planning.
$5,587.00 USD
More are expected on April 14, 2025
Status: This product is temporarily out of stock.
Qty: Delivered as early as April 14, 2025 when ordered in
This product is eligible for factory repair.
Size 10, symbol W8, integrated electronics, 24 V DC
Industrial hydraulic valve in a high performance range, reliable control of oil flow direction according to hydraulic symbol
Unpacked Weight: 8.001 kg
Pilot-operated, 2-stage proportional directional valves with integrated electronics (OBE) Control of the direction and magnitude of a flow Operation by means of proportional solenoids with central thread and detachable coil For subplate mounting: Porting pattern according to ISO 4401 Optional auxiliary operating device Spring-centered control spool
Pilot-operated proportional directional valves type 4WRZ(E)… and 5WRZ(E).52…
Valves of type 4WRZ(E)... are pilot-operated 4-directional valves that are actuated by means of proportional solenoids. Their function is to control the flow direction and size.
Valves of type 5WRZ(E)... are equipped with an additional port "R" (only NG52).
Set-up:
The valve basically consists of:
Pilot control valve (9) with proportional solenoids (5 and 6)
Main valve (10) with main control spool (11) and centering spring (12)
Function:
With de-energized solenoids (5, 6), the main control spool (11) is held in the central position by means of the centering spring (12)
The main control spool (11) is controlled by the pilot control valve (9); the main control spool is proportionally moved, e.g. by actuating solenoid "b" (6)
→ The control spool (2) is moved to the right, pilot oil enters the pressure chamber (13) via the pilot control valve (9) and deflects the main control spool (11) proportionally to the electric input signal
→ Connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristics
Pilot oil supply to the pilot control valve internally via port P or externally via port X
Switching off the solenoid (6)
→ The control spool (2) and main control spool (11) are moved back into the central position
Depending on the spool position, flow occurs from P to A and B to T or P to B and A to T (R)
An optional manual override (14 and 15) can be used to move the control spool (2) without solenoid energization.
Notice:
Accidental activation of the manual override may lead to uncontrolled machine movements!
Notice:
Due to the design principle, internal leakage which may increase over the life cycle is inherent to the valves.
(measured with HLP46, ϑÖl = 40 ±5 °C)
Rated flow 25 l/min at a valve pressure differential of 10 bar
Size 10
Rated flow 50 l/min at a valve pressure differential of 10 bar
Size 10
Rated flow 85 l/min at a valve pressure differential of 10 bar
Size 10
Transition function with stepped electric input signals (ps = 50 bar)
Size 10
Rated flow 100 l/min at a valve pressure differential of 10 bar
Size 16
Rated flow 125 l/min at a valve pressure differential of 10 bar
Size 16
Rated flow 150 l/min at a valve pressure differential of 10 bar
Size 16
Rated flow 180 l/min at a valve pressure differential of 10 bar
Size 16
Transition function with stepped electric input signals (ps = 50 bar)
Size 16
Rated flow 220 l/min at a valve pressure differential of 10 bar
NG25
Rated flow 325 l/min at a valve pressure differential of 10 bar
NG25
Transition function with stepped electric input signals (ps = 50 bar)
NG25
Rated flow 360 l/min at a valve pressure differential of 10 bar
Size 32
Rated flow 520 l/min at a valve pressure differential of 10 bar
Size 32
Transition function with stepped electric input signals (ps = 50 bar)
Size 32
Rated flow 1000 l/min at a valve pressure differential of 10 bar
NG52
Transition function with stepped electric input signals (ps = 50 bar)
NG52
Symbols
|
With symbols E1- and W8-, the following applies: |
|
|
P → A: qvmax |
B → T: qv/2 |
|
P → B: qv/2 |
A → T: qvmax |
|
With symbols E3- and W9-, the following applies: |
|
|
P → A: qvmax |
B → T: blocked |
|
P → B: qv/2 |
A → T: qvmax |
|
(Differential circuit, piston top at port A) |
|
|
Notice: |
|
Pilot oil supply
|
3 Switching positions |
2 Switching positions (Version ".A)" |
|
|
|
Type 4WRZ …
External pilot oil supply, external pilot oil return The pilot oil is supplied from a separate control circuit (external). The pilot oil return is not directed into channel T of the main valve, but is separately directed to the tank via port Y (external). |
|
|
Type 4WRZ …E…
Internal pilot oil supply, external pilot oil return
The pilot oil supply is implemented from channel P of the main valve (internally). The pilot oil return is not directed into channel T of the main valve, but is separately directed to the tank via port Y (external). In the subplate, port X is to be closed. |
|
|
Type 4WRZ …ET…
Internal pilot oil supply; internal pilot oil return
The pilot oil supply is implemented from channel P of the main valve (internally). The pilot oil is directly returned to channel T of the main valve (internally). In the subplate, ports X and Y are to be closed. |
|
|
Type 4WRZ …T…
External pilot oil supply, internal pilot oil return
The pilot oil is supplied from a separate control circuit (external). The pilot oil is directly returned to channel T of the main valve (internally). In the subplate, port Y is to be closed. |
|
Pin assignment |
Contact |
Assignment interface "A1" |
Assignment interface "F1" |
|
Power supply |
A |
24 VDC (u(t) = 19,4 ... 35 V); Imax = 2 A |
|
|
B |
0 V |
||
|
C |
cannot be used 1) |
||
|
Differential amplifier input (command value) |
D |
±10 V command value; Re > 50 kΩ |
4 ...20 mA command value; Re > 100 Ω |
|
E |
Reference potential command value |
||
|
F |
cannot be used 1) |
||
|
PE |
connected to cooling element and valve housing |
||
|
1) |
Contacts C and F must not be connected! |
||
Command value: Positive command value 0 ... +10 V (or 12 ... 20 mA) at D and reference potential at E cause flow from P → A and B → T.
Negative command value 0 ... –10 V (or 12 ... 4 mA) at D and reference potential at E cause flow from P → B and A → T.
With valves with solenoid on side a (e.g. variant EA and W6A), a positive command value 0 ... +10 V (or 4 ... 20 mA) at D and reference potential at E result in flow from P → B and A → T.
Connection cable: Recommendation: – up to 25 m cable length type LiYCY 7 x 0.75 mm²
– up to 50 m cable length type LiYCY 7 x 1.0 mm²
External diameter 6.5 … 11 mm
Connect shield to PE only on the supply side.
Size 10
Dimensions in mm
|
1 |
Main valve |
|
2 |
Pilot control valve |
|
3 |
Dimension for version 4WRZ (not seawater-resistant) |
|
4 |
Dimension for version 4WRZE |
|
5 |
Proportional solenoid "a" |
|
6 |
Proportional solenoid "b" |
|
7 |
Mating connector "A", color gray, separate order |
|
8 |
Mating connector "B", color black, separate order |
|
9 |
Mating connector according to DIN EN 175201-804, separate order |
|
10 |
Concealed manual override “N9” |
|
11 |
Plug screw for valve with one solenoid |
|
12 |
Name plate pilot control valve |
|
13 |
Name plate main valve |
|
14 |
Integrated electronics (OBE) |
|
15 |
"D3” pressure reducing valve |
|
16 |
Identical seal rings for ports A, B, P and T (T1) |
|
17 |
Identical seal rings for ports X and Y |
|
18 |
Space required to remove the mating connector |
|
19 |
Diversion plate |
|
20 |
Machined valve contact surface; Porting pattern according to ISO 4401-05-05-0-05 |
Recommended valve mounting screws (separate order):
4 hexagon socket head cap screws ISO 4762 - M6 x 45 - 10.9-flZn-240h-LTightening torque MA = 13.5 Nm ± 10 %, material no. R913000258 or
4 hexagon socket head cap screws ISO 4762 - M6 x 45 - 10.9Tightening torque MA = 15.5 Nm ± 10 %
Size 16
Dimensions in mm
|
1 |
Main valve |
|
2 |
Pilot control valve |
|
3 |
Dimension for version 4WRZ (not seawater-resistant) |
|
4 |
Dimension for version 4WRZE |
|
5 |
Proportional solenoid "a" |
|
6 |
Proportional solenoid "b" |
|
7 |
Mating connector "A", color gray, separate order |
|
8 |
Mating connector "B", color black, separate order |
|
9 |
Mating connector according to DIN EN 175201-804, separate order |
|
10 |
Concealed manual override “N9” |
|
11 |
Plug screw for valve with one solenoid |
|
12 |
Name plate pilot control valve |
|
13 |
Name plate main valve |
|
14 |
Integrated electronics (OBE) |
|
15 |
"D3” pressure reducing valve |
|
16 |
Identical seal rings for ports A, B, P, and T |
|
17 |
Identical seal rings for ports X and Y |
|
18 |
Space required to remove the mating connector |
|
19 |
Diversion plate |
|
20 |
Machined valve contact surface; Porting pattern according to ISO 4401-07-07-0-05 |
|
21 |
Locking pin |
Recommended valve mounting screws (separate order):
2 hexagon socket head cap screws ISO 4762 - M6 x 60 - 10.9-flZn-240h-LTightening torque MA = 12.2 Nm ± 10 % , material no. R913000115
4 hexagon socket head cap screws ISO 4762 - M10 x 60 - 10.9-flZn-240h-LTightening torque MA = 58 Nm ± 20 %, material no. R913000116 or
2 hexagon socket head cap screws ISO 4762 - M6 x 60 - 10.9
Tightening torque MA = 15.5 Nm ± 10 %
4 hexagon socket head cap screws ISO 4762 - M10 x 60 - 10.9
Tightening torque MA = 75 Nm ± 20 %
NG25
Dimensions in mm
|
1 |
Main valve |
|
2 |
Pilot control valve |
|
3 |
Dimension for version 4WRZ (not seawater-resistant) |
|
4 |
Dimension for version 4WRZE |
|
5 |
Proportional solenoid "a" |
|
6 |
Proportional solenoid "b" |
|
7 |
Mating connector "A", color gray, separate order |
|
8 |
Mating connector "B", color black, separate order |
|
9 |
Mating connector according to DIN EN 175201-804, separate order |
|
10 |
Concealed manual override “N9” |
|
11 |
Plug screw for valve with one solenoid |
|
12 |
Name plate pilot control valve |
|
13 |
Name plate main valve |
|
14 |
Integrated electronics (OBE) |
|
15 |
"D3” pressure reducing valve |
|
16 |
Identical seal rings for ports A, B, P, and T |
|
17 |
Identical seal rings for ports X and Y |
|
18 |
Space required to remove the mating connector |
|
19 |
Diversion plate |
|
20 |
Machined valve contact surface; Porting pattern according to ISO 4401-08-08-0-05 (ports X and Y as required) |
|
21 |
Locking pin |
Recommended valve mounting screws (separate order):
6 hexagon socket head cap screws ISO 4762 - M12 x 60 - 10.9-flZn-240h-LTightening torque MA = 100 Nm ± 20 %, material no. R913000121 or
6 hexagon socket head cap screws ISO 4762 - M12 x 60 - 10.9Tightening torque MA = 130 Nm ± 20 %
Size 32
Dimensions in mm
|
1 |
Main valve |
|
2 |
Pilot control valve |
|
3 |
Dimension for version 4WRZ (not seawater-resistant) |
|
4 |
Dimension for version 4WRZE |
|
5 |
Proportional solenoid "a" |
|
6 |
Proportional solenoid "b" |
|
7 |
Mating connector "A", color gray, separate order |
|
8 |
Mating connector "B", color black, separate order |
|
9 |
Mating connector according to DIN EN 175201-804, separate order |
|
10 |
Concealed manual override “N9” |
|
11 |
Plug screw for valve with one solenoid |
|
12 |
Name plate pilot control valve |
|
13 |
Name plate main valve |
|
14 |
Integrated electronics (OBE) |
|
15 |
"D3” pressure reducing valve |
|
16 |
Identical seal rings for ports A, B, P, and T |
|
17 |
Identical seal rings for ports X and Y |
|
18 |
Space required to remove the mating connector |
|
19 |
Diversion plate |
|
20 |
Machined valve contact surface; Porting pattern according to ISO 4401-10-09-0-05 (Ports X and Y as required) |
|
21 |
Locking pin |
Recommended valve mounting screws (separate order):
6 hexagon socket head cap screws ISO 4762 - M20 x 80 - 10.9-flZn-240h-LTightening torque MA = 340 Nm ± 20 %, material no. R901035246 or
4 hexagon socket head cap screws ISO 4762 - M20 x 80 - 10.9Tightening torque MA = 430 Nm ± 20 %
NG52
Dimensions in mm
|
1 |
Main valve |
|
2 |
Pilot control valve |
|
3 |
Dimension for version 4WRZ (not seawater-resistant) |
|
4 |
Dimension for version 4WRZE |
|
5 |
Proportional solenoid "a" |
|
6 |
Proportional solenoid "b" |
|
7 |
Mating connector "A", color gray, separate order |
|
8 |
Mating connector "B", color black, separate order |
|
9 |
Mating connector according to DIN EN 175201-804, separate order |
|
10 |
Concealed manual override “N9” |
|
11 |
Plug screw for valve with one solenoid |
|
12 |
Name plate pilot control valve |
|
13 |
Name plate main valve |
|
14 |
Integrated electronics (OBE) |
|
15 |
Space required to remove the mating connector |
|
16 |
Adapter plate |
|
17 |
"D3” pressure reducing valve |
|
18 |
Diversion plate |
|
19 |
Transport aid |
Recommended valve mounting screws (separate order):
4 hexagon socket head cap screws ISO 4762 - M12 x 70 - 10.9-flZn-240h-LTightening torque MA = 100 Nm ± 20 %, material no. R913000515 or
4 hexagon socket head cap screws ISO 4762 - M12 x 70 - 10.9Tightening torque MA = 130 Nm ± 20 %
Mating connectors for valves with round connector, 6-pole + PE
7P Z31
Mating connectors for valves with round connector, 6-pole + PE
7P Z31
For valves with round connector according to EN 175201-804, 6-pole + PE as well as 6-pole, compatible with VG 95328Data sheet
Spare parts & repair
Related Products
R900247300
$8,219.00 USD
R900913443
$1,706.00 USD
R900703117
$10,668.00 USD
R900943859
$6,959.00 USD
R900709013
$8,343.00 USD
