REXROTH R900936935 4WRA6EA30-2X/G24N9K4/V

R900936935
4WRA6EA30-2X/G24N9K4/V
REXROTH

4WRA6EA30-2X/G24N9K4/V

Direct operated proportional directional valve

Manufacturer: Bosch Rexroth

Material #: R900936935

Model : 4WRA6EA30-2X/G24N9K4/V

Specifications

Size 6, 10
Component series 2X
Maximum operating pressure 315 bar
Maximum flow 75 l/min
The Bosch Rexroth 4WRA6EA30-2X/G24N9K4/V (R900936935) is a high-performance proportional directional valve designed for direct operation and subplate mounting. This particular model is crafted for precise control of the direction and magnitude of flow within hydraulic systems. It features a robust housing with a connection surface, a spring-centered control spool, and two high-quality proportional solenoids with central threads and detachable coils, which are regulated by external control electronics. This valve operates by energizing the solenoids, which directly actuate the control spool against the force of compression springs, allowing for proportional displacement in relation to the electric input signal. The design ensures smooth and progressive flow characteristics between ports P to A and B to T when in operation. When de-energized, the springs return the spool to its central position, ensuring system stability. The 4WRA6EA30-2X/G24N9K4/V valve is specifically engineered with two spool positions (type WRA...A...), featuring only one solenoid for actuation while the second position is sealed with a plug screw or cover depending on size requirements. This configuration corresponds closely to three-position models but offers simplified operation with one actuating solenoid. It's crucial that during installation and operation, measures are taken to prevent the tank line from running empty. If necessary, based on installation conditions, a preload valve with approximately bar preload pressure should be installed. This Bosch Rexroth valve boasts impressive specifications including a maximum operating pressure of bar and a maximum flow rate of l/min. It adheres to ISO standards for porting patterns, ensuring compatibility and ease of integration into various hydraulic systems. The 4WRA6EA30-2X/G24N9K4/V is designed without electrical position feedback but relies on external electronics for precise control functionality.
Direct operated proportional directional valve without electrical position feedback, with external electronics 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 Spring-centered control spool
Product Description

The 4/2 and 4/3 proportional directional valves are designed as direct operated devices in plate design. Operation by means of proportional solenoids with central thread and detachable coil. The solenoids are controlled by external control electronics.

Set-up:

The valve basically consists of:

Housing (1) with connection surface Control spool (2) with compression springs (3 and 4) Solenoids (5 and 6) with central thread

Function:

With de-energized solenoids (5 and 6), central position of the control spool (2) by compression springs (3 and 4) Direct operation of the control spool (2) by energization a proportional solenoid, e.g. control of solenoid "b" (6) Displacement of the control spool (2) to the left, proportionally to the electric input signal Connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristics Switching off the solenoid (6) The compression spring (3) brings the control spool (2) back into the central position

Valve with two spool positions (type 4WRA...A...):

The function of this valve version basically corresponds to the valve with three spool positions. This 2 spool position valve is, however, only equipped with solenoid “a”. Instead of the 2nd proportional solenoid, there is a plug screw (8.1) with NG 6 or a cover (8.2) with NG10.

Notice:

The tank line must not be allowed to run empty. With corresponding installation conditions, a preload valve (preload pressure approx. 2 bar) must be installed.

Symbols

With control spool symbol E1- and W1-, the following applies:
P → A: qvmax	B → T: qv/2
P → B: qv/2	A → T: qvmax
Notice: In the zero position, control spool symbols W and WA have a connection from A → T and from B → T with approx. 3% of the relevant nominal cross-section.