Manufacturer: Bosch Rexroth
Material #: R978870561
Model : 4WN10D3X//12
***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 4WN10D3X//12 (R978870561) is a high-precision directional spool valve designed to control the start, stop, and direction of fluid flow within hydraulic systems. This valve is part of Bosch Rexroth's WN series and features a robust housing, a hydraulic actuation cylinder, a control spool, and one or two return springs that ensure reliable return to the neutral or initial position when the valve is deenergized. The model 4WN10D3X//12 stands out due to its hydraulic operating method and its compliance with ISO porting pattern standards.
This particular model is engineered for applications requiring precise flow control and can be utilized in various hydraulic circuits. With its throttle insert requirement, it can effectively manage flows that exceed the valve's performance limit during switching processes. This feature makes it suitable for systems where flow rates need to be moderated to prevent damage or ensure smoother operation.
The 4WN10D3X//12 has been designed with user flexibility in mind, offering multiple ways of configuration. Its size and component series X are indicative of its capability to withstand a maximum operating pressure of up to bar and accommodate maximum flow rates of l/min. These specifications ensure that the valve can handle demanding applications while maintaining efficiency and reliability.
In summary, the Bosch Rexroth 4WN10D3X//12 directional spool valve is an essential component for hydraulic systems requiring accurate control over fluid dynamics. Its sturdy construction and design tailored for high-pressure applications make it a valuable addition to any industrial setting where fluid flow needs precise management.
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This product is eligible for factory repair.
Valves of type WN are fluidically actuated directional spool valves.
They control the start, stop and direction of a flow.
The directional valves basically consist of housing (1), one type of actuation (2.2) (hydraulic actuation cylinder), control spool (3) and one or two return springs (4).
When de-energized, the control spool (3) is held in the central position or in the initial position by the return springs (4) (except for version "O").
The control spool (3) is moved to the desired spool position by means of the types of actuation.
Type 4WN 10 D5X/OF…
Type 4WN 10 E5X/…
Throttle insert
The use of a throttle insert is required when, due to prevailing operating conditions, flows occur during the switching processes which exceed the performance limit of the valve.
(measured with HLP46, ϑOil = 40 ±5 °C)
Δp-qV characteristic curves
|
Symbol |
Direction of flow |
|||
|
P ‒ A |
P ‒ B |
A ‒ T |
B ‒ T |
|
|
A; B |
6 |
6 |
‒ |
‒ |
|
C |
1 |
2 |
5 |
7 |
|
D |
2 |
2 |
5 |
7 |
|
E |
17 |
16 |
19 |
21 |
|
F |
2 |
3 |
22 |
23 |
|
G |
4 |
4 |
24 |
24 |
|
H |
14 |
14 |
20 |
21 |
|
J |
3 |
3 |
9 |
11 |
|
J73 |
22 |
21 |
23 |
24 |
|
L |
3 |
3 |
9 |
9 |
|
M |
14 |
14 |
6 |
8 |
|
P |
17 |
14 |
20 |
23 |
|
Q |
16 |
17 |
4 |
8 |
|
R |
18 |
21 |
18 |
24 |
|
T |
18 |
4 |
10 |
24 |
|
U |
3 |
3 |
6 |
11 |
|
V |
17 |
17 |
18 |
20 |
|
W |
upon request |
|||
|
Central position: |
|||||
|
Symbol |
Direction of flow |
||||
|
P ‒ A |
P ‒ B |
B ‒ T |
A ‒ T |
P ‒ T |
|
|
H |
12 |
12 |
13 |
13 |
15 |
Performance limits
(measured with HLP46, ϑOil = 40 ±5 °C)
Notice!
The specified performance limits are valid for use 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 admissible performance limit may be considerably lower with only one direction of flow (e. g. from P to A while port B is blocked)!
In such use cases, please consult us!
|
Characteristic curve |
Symbol |
|
6 |
C, C/OF, D, D/OF, E, J, L, M, U |
|
7 |
H |
|
8 |
G |
|
9 |
A,B |
| 1) | Example:Symbol E with spool position “a” → ordering code ..EA..Symbol E with spool position “b" → ordering code ..EB.. |
Dimensions in mm
3/2 directional seat valve
Dimensions in mm
Notices!
Deviating from ISO 4401, port T is referred to as TA and port T1 is referred to as TB in this data sheet. The dimensions are nominal dimensions which are subject to tolerances. When screwing in/releasing the connection tube on the pilot oil port (9), the bushing (10) must be secured against twisting by using an open-end wrench.Subplates according to data sheet 45054 (separate order)
G 66/01 (G3/8) 1)
G 67/01 (G1/2) 1)
G 534/01 (G3/4) 1)
G 66/12 (SAE-6; 9/16-18) 2)
G 67/12 (SAE-8; 3/4-16) 2)
G 534/12 (SAE-12; 1-1/16-12) 2)
Valve mounting screws (separate order)
4 hexagon socket head cap screws, metric
ISO 4762 - M6 x 40 - 10.9-flZn-240h-L
(friction coefficient μtotal = 0.09 to 0.14);
tightening torque MA = 12.5 Nm ± 10 %,
material no. R913000058
or
4 hexagon socket head cap screws
ISO 4762 - M6 x 40 - 10.9 (self procurement)
(friction coefficient μtotal = 0.12 to 0.17);
tightening torque MA = 15.5 Nm ± 10 %
4 hexagon socket head cap screws UNC
1/4-20 UNC x 1-1/2” ASTM-A574
(friction coefficient μtotal = 0.19 to 0.24);
tightening torque MA = 25 Nm ± 15 %,
(friction coefficient μtotal = 0.12 to 0.17);
tightening torque MA = 19 Nm ± 10 %,
material no. R978800710
With different friction coefficients, the tightening torques are to be adjusted accordingly!
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