PROPORTIONAL DIRECTIONAL VALVE 4WRZE25W8-325-7X/6EG24N9ETK31/F1D3M

Manufacturer: Bosch Rexroth

Material #: R901052185

Model : 4WRZE25W8-325-7X/6EG24N9ETK31/F1D3M

***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 4WRZE25W8-325-7X/6EG24N9ETK31/F1D3M (R901052185) is a high-performance, pilot-operated proportional directional valve with integrated electronics, designed for reliable control of oil flow direction in hydraulic systems. It features a size W spool valve with a maximum operating pressure and is capable of handling a nominal flow rate as specified. The valve operates with a supply voltage of 24 VDC and provides analog connectivity with a command value range of 4-20 mA for precise control. The unit is equipped with internal pilot oil supply and return, ensuring consistent performance, and includes a pressure-reducing valve for added functionality. Its electrical actuation is facilitated through an electrical connector pole PE according to EN standards, offering ease of integration into various industrial setups. Designed for subplate mounting, the valve conforms to ISO porting patterns, making it versatile for different system configurations. The model also includes concealed manual override and auxiliary actuation options for increased operational flexibility. The spool symbol W indicates the specific flow path configuration of the valve. For safety and reliability, it incorporates NBR seals compatible with various hydraulic fluids like HL, HLP, HLPD, HVLP, HVLPD, and HFC. This Bosch Rexroth valve stands out due to its robust design that ensures long service life even in demanding applications. It's engineered to provide precise control over hydraulic flow direction and magnitude through its advanced solenoid technology and integrated electronics setup. The device's spring-centered control spool ensures that the valve returns to its neutral position when de-energized. In summary, this Bosch Rexroth proportional directional valve is an essential component for sophisticated hydraulic systems requiring precise flow direction control and variable flow rates within industrial environments.

Size 25, 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: 21.021 kg

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.