Vickers SM4-20 Servo Valve | 3025047 | SM4-20(15)57-80/40-10-S182 | H607H

Vickers Type SM4-20 Series Two-Stage High-Response Servo Valves

Product Overview: The Vickers SM4-20 Series is a cornerstone of industrial precision control, featuring a two-stage electro-hydraulic design driven by a highly sensitive nozzle-flapper pilot and a four-way sliding spool. This series is specifically developed for closed-loop systems requiring exceptional frequency response, low hysteresis, and stringent null stability. Integrated mechanical feedback ensures that the main spool maintains micron-level regulation accuracy, even under extreme pressure and high-flow conditions.

Featured on this page are the part number 3025047 (Model: SM4-20(15)57-80/40-10-H607H) and the specialized high-performance model SM4-20(15)57-80/40-10-S182.

Key Technical Advantages:

• Extreme Dynamic Frequency Response: Capable of tracking micro-electrical signals with a -3dB bandwidth typically exceeding 60-100Hz, ideal for high-speed simulation tasks.

• High Resolution & Low Hysteresis: Precision-ground spool and sleeve assemblies minimize mechanical friction, keeping hysteresis at an ultra-low level to maximize system linearity.

• H607H/S182 Specialized Configurations: Factory-calibrated for specific feedback and flow characteristics, ensuring “out-of-the-box” stability for flight simulation and material testing applications.

• Rugged Industrial Durability: Robust aluminum or stainless-steel bodies combined with wet-pin solenoid technology withstand intense mechanical vibration and high-temperature hydraulic environments.

Detailed Specifications & Parameters:

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

• Featured Models & Part Numbers:

  • 3025047 (Part Number)

  • SM4-20(15)57-80/40-10-H607H (High-sensitivity feedback type)

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

• Core Performance Specs:

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

  • Rated Pressure: Standard operating pressure 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 Signal: Low-current servo commands (±8mA, ±10mA, or ±40mA, etc.).

  • Design Sequence: 10 Series.