Vickers | SP4-252076-30100-10
SP4-25(20)76-30/100-10
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The SP4-25(20)76-30/100-10 servo valve belongs to the Servo Valves series from Vickers and meters hydraulic flow for closed-loop motion control. It supplies a rated flow of 76 L/min (20 US gpm) so cylinders or motors can reach commanded speeds without external throttles. A coil rated current of 100 mA drives the torque motor, while the 30 Ohm coil resistance matches typical power amplifiers. Threshold sensitivity is held to 0.5 percent of rated current, allowing fine flow adjustments from small command signals. Hysteresis around null remains within 3 percent of rated current to keep bidirectional positioning repeatable. System pressure must stay above 200 psi (14 bar) to secure stable spool control.
The valve accommodates supply pressures up to 3000 psi (210 bar) for use in high-pressure hydraulic lines. It survives proof testing at 150 percent of the maximum supply on the pressure ports and at 100 percent of that value on the return port, confirming structural safety during commissioning checks. A port circle diameter of 0.875 in positions the mounting holes for direct interchange with standard subplates, streamlining installation. The unit functions in environments up to 135 °C (275 °F), permitting placement near heat-generating machinery without derating.
Technical Specifications
Coil Rated Current
100 mA
Coil Resistance
30 Ohms
Hysteresis Around Null
≤ 3% (of rated current)
Max Supply Pressure
3000 psi (210 bar)
Min Supply Pressure
200 psi (14 bar)
Port Circle Diameter
0.875 in
Proof Pressure Return
100% of max supply
Proof Pressure Supply
150% of max supply
Rated Flow
76 L/min
Rated Flow (us)
20 US gpm
Threshold
≤ 0.5% (of rated current)
Working Temp Max
135 C (275 F)
1620 Old Apex Road
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