Vickers | SX4-H-20519-8050-10
SX4-H-20(5)19-80/50-10
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The SX4-H-20(5)19-80/50-10 servo valve belongs to the Servo Valves series and is produced by Vickers for precise hydraulic automation of cylinders and motors. Its 4-way closed-center layout meters flow in either direction yet blocks all ports at neutral, so actuators remain locked when no command is present. A two-stage arrangement employs a small pilot spool to shift the main spool, delivering fast response without requiring a large solenoid force. The valve passes up to 19 L/min, defining the maximum flow it can control under rated conditions, and it tolerates supply pressures as high as 210 bar for use in high-pressure industrial circuits. An aluminum body minimizes weight and resists corrosion inside oil-filled manifolds. The ISO 4401-05 port pattern standardizes mounting, and a subplate base lets technicians replace the unit without disturbing rigid piping.
Electrical characteristics include a coil resistance of 80 Ω, which determines the drive voltage needed from the servo amplifier, and a peak coil current limit of 50 mA that prevents thermal damage to the windings. A sealed MS3016A-14S-2S four-pin connector provides the single interface for power and control signals. The pilot stage is protected by a 35 μm absolute filter to keep debris from entering the critical nozzles and flapper. A port circle diameter of 0.875 in matches common manifold tooling, ensuring proper gasket compression. Compact dimensions—2.83 in high, 3.92 in wide, and 3.89 in long—allow dense stacking of multiple valves on the same block. Continuous operation is permitted up to 135 °C, so the valve can be mounted near hot pumps or engines without derating.
Technical Specifications
Body Material
Aluminum
Coil Resistance
80 2
Electrical Connector
MS3016A-14S-2S (4-pin)
Height
2.83 in
Length
3.89 in
Max Coil Current
50 mA
Max Supply Pressure
210 bar
Mounting Interface
ISO 4401-05
Pilot Stage Filter
35 m (absolute)
Port Circle Diameter
0.875 in
Rated Flow
19 L/min
Stage
Two-Stage
Valve Mount
Subplate
Valve Type
4-Way Closed-Center
Width
3.92 in
Working Temperature Max
135 b0C
1620 Old Apex Road
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