Bosch Rexroth | 4WRTE25V220P-4X6EG24K31A1M
4WRTE25V220P-4X/6EG24K31/A1M
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The 4WRTE25V220P-4X/6EG24K31/A1M valve is a proportional unit made by Bosch Rexroth for the 4WRTE Directional Control Valves series. It regulates flow and direction in hydraulic automation loops that require precise metering under varying loads. A nominal size of 25 allows the body to accommodate medium-to-large passages, while a rated flow of 220 l/min at a 5 bar differential establishes the reference capacity for circuit design. The flow characteristic identified by the letter P specifies the linearity of spool travel to flow rate, and the spool symbol V defines the edge geometry that produces this response. For short-term peaks the manufacturer recommends a maximum throughput of 870 l/min. Electrical supply is centered on a 24 V DC coil, with an allowable range from 18 V DC to 35 V DC so the driver can tolerate typical voltage drops. Connection to the solenoid is made through a DIN EN 175201-804 plug coded K31.
The valve uses an external pilot oil supply and an external pilot oil return, keeping pilot flow isolated from the main gallery and simplifying warm-up behavior in closed manifolds. Pilot pressure may be applied up to 315 bar, which aligns with the power stage yet protects the pilot poppet from overstress. Ports p, a, and b withstand operating pressures up to 350 bar, supporting high-pressure servo loops in presses or die-casting machines. A protection class of IP65 encloses the solenoid housing against dust ingress and water jets encountered in production cells. Maximum coil current is limited to 1.6 A so the power amplifier can be sized accurately, and the magnetic assembly draws no more than 72 VA, reducing heat generation in continuous use. These electrical and hydraulic limits frame safe operating envelopes and ensure predictable performance when the valve is integrated into closed-loop motion controls.
Technical Specifications
Electrical Connection
DIN EN 175201-804 (K31)
Flow Characteristic
P
Max Current Consumption
1.6 A
Max Flow (recommended)
870 l/min
Max Operating Pressure (p,a,b)
350 bar
Max Power Consumption
72 VA
Nominal Size
25
Pilot Oil Return
External
Pilot Oil Supply
External
Pilot Supply Pressure Max
315 bar
Protection Class
IP65
Rated Flow (Δp=5 Bar)
220 l/min
Spool Symbol
V
Supply Voltage (nominal)
24 V DC
Supply Voltage Lower Limit
18 V DC
Supply Voltage Upper Limit
35 V DC
1620 Old Apex Road
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