Vickers SM4 Servo Valve | SM4-20(15)57-80/40-10 | SM4-12 | SM4-20(7.5)28

Vickers SM4 Series High-Performance Two-Stage Servo Valves

Product Overview:

The Vickers SM4 Series servo valves are the pulse of precision electro-hydraulic systems, renowned for their exceptional dynamic performance and long-term stability. Utilizing the classic Two-stage Nozzle Flapper architecture, the first stage employs a torque motor to actuate the flapper, while the second stage provides hydraulic amplification to drive the main spool. The SM4-12 and SM4-20 series provide precise flow control at extremely high frequency responses, making them ideal for flight simulators, industrial robotics, material testing machines, and various closed-loop position/velocity control systems.

Featured models include the high-flow SM4-20(15)57, the precision SM4-20(7.5)28, and specialized suffixes such as H607H and S182.

Key Technical Advantages:

• Ultimate Dynamic Response: The nozzle-flapper design provides high control bandwidth, responding instantaneously to complex micron-level commands.

• Servo-Grade Precision: Mechanical feedback ensures minimal hysteresis and superior repetitive positioning accuracy for stringent closed-loop demands.

• Versatile Configurations: Offers a broad flow range from 3.8 L/min to 76 L/min to match various actuator power levels.

• High-Pressure Durability: Supports operating pressures up to 210 Bar (3000 PSI) or 315 Bar (4500 PSI), depending on the specific model suffix.

Detailed Specifications & Parameters:

• Core Series: Vickers SM4 Series (Size 12 & 20).

• Featured Model Matrix:

  • SM4-20(15)57-80/40-10-H607H (Rated Flow 57 L/min, 15$\Omega$ coil, High-response spec)

  • SM4-20(7.5)28-80/40-50 (Rated Flow 28 L/min, 7.5$\Omega$ coil, Industrial standard)

  • SM4-20(15)57-80/40-10-S182 (Customized S-sequence specialty spec)

  • SM4-12 (Compact servo control series)

• Core Technical Specs:

  • Rated Flow: 28 L/min, 57 L/min (@ $\Delta p = 70 \text{ Bar}$).

  • Coil Resistance: 7.5 $\Omega$ or 15 $\Omega$ (to match control signals).

  • System Pressure: Standard rating of 210 Bar.

  • Feedback Type: Mechanical Feedback.