Vickers SM4-20 Servo Valve | SM4-20(15)57-80/40-10-H607H | S182 | High Response

Vickers Type SM4-20 Series High-Response Electro-Hydraulic Servo Valves

Product Overview: The Vickers SM4-20 Series servo valves are pivotal actuation components in closed-loop hydraulic control systems. Featuring a two-stage electro-hydraulic design, these valves utilize a sensitive nozzle-flapper pilot to drive a four-way sliding spool output stage. Through a precision mechanical feedback mechanism, the SM4-20 converts micro-current signals into accurate hydraulic power. Its exceptional frequency response makes it the premier choice for flight simulators, precision machine tools, fatigue testing rigs, and robotic control systems.

This page features the high-gain customized SM4-20(15)57-80/40-10-H607H and the industrial-standard precision model SM4-20(15)57-80/40-10-S182.

Key Technical Advantages:

• Extreme Dynamic Response: Offers ultra-wide bandwidth, tracking high-frequency step signals in real-time to ensure precise, lag-free actuator movement.

• High Resolution & Null Stability: Precision-ground spool and sleeve assemblies minimize mechanical hysteresis and provide strong resistance to null shift.

• H607H/S182 Specialized Specs: Factory-calibrated for specific feedback loops, providing superior linearity and symmetry for demanding research and industrial requirements.

• Wet-Pin Solenoid Design: The armature operates immersed in hydraulic fluid, providing excellent heat dissipation and lubrication for millions of operational cycles.

Detailed Specifications & Parameters:

• Core Series: Vickers SM4-20 High Performance Series.

• Featured Model Matrix:

  • SM4-20(15)57-80/40-10-H607H (High-precision feedback, H607H sequence)

  • SM4-20(15)57-80/40-10-H607 (Standard pilot performance)

  • SM4-20(15)57-80/40-10-S182 (Specific industrial custom sequence)

• Core Performance Specs:

  • Nominal Size: Size 20 (Two-stage servo architecture).

  • Rated Pressure: Operating pressure up to 210 Bar (3,000 PSI), with peaks up to 315 Bar.

  • Rated Flow: Range covering 57 L/min to 80 L/min at specified pressure drops.

  • Control Command: Low-current servo signals (typically ±10mA, ±40mA, or ±200mA).

  • Design Sequence: 10 Series.