4WRL25EZ350S-3X/G24Z4/M-750

The 4WRL25EZ350S-3X/G24Z4/M-750 valve belongs to the 4WRL Solenoid Valves series from Bosch Rexroth and regulates hydraulic flow and pressure in automated machinery. It accepts a supply of 24 V DC, so power can be taken directly from common control cabinets. A maximum solenoid current of 2.7 A accompanies this voltage to produce the magnetic force needed for spool actuation, while overall electrical demand remains limited by a 40 VA power rating to reduce panel fuse size. The coil winding shows a resistance of 2.5 Ω at 20 °C, which defines the inrush and holding characteristics. Hydraulic capacity reaches 900 l/min, allowing the valve to govern large actuator groups without bypass manifolds. Pressurized lines P, A, and B can be loaded up to 350 bar, permitting installation in heavy-duty presses or injection machines. Electrical hookup is performed through a Z4 connector conforming to DIN 43560, simplifying replacement with other Bosch Rexroth coils. An IP65 enclosure protects the assembly against dust and low-pressure water jets, making it suitable for wash-down production zones.

Pilot circuit parameters support stable control behavior. The pilot stage needs at least 10 bar to shift the main spool and accepts up to 250 bar, so a wide range of system pressures can drive the servo arrangement. During operation the pilot branch draws 24 l/min, which must be accounted for in pump sizing. Return and drain ports T, X, and Y withstand a maximum of 250 bar, allowing back-pressure compensation when tank lines are long or restricted. Internal tightness is characterized by a main-stage leakage of no more than 1000 cm³ per minute at 100 bar, while the pilot seat limits leakage to 500 cm³ per minute under the same test conditions; these values help designers estimate heat generation and reservoir sizing. NBR seals are fitted to resist standard hydraulic oils and provide a cost-effective barrier against fluid loss. The assembled unit weighs 18 kg, so mounting brackets and pipe supports must be chosen to hold that mass without distortion during service.