Product Overview
The VICKERS SM4-20(15)57-80/40-10-S106 (Part Number: 3025143) is a high-performance electrohydraulic servo valve engineered by Vickers (Eaton) for precision motion control in demanding industrial and mobile hydraulic systems. Utilizing a two-stage, nozzle-flapper pilot design with a spool-type main stage, this servo valve converts low-power electrical command signals into highly accurate hydraulic flow and pressure outputs. The SM4 series is renowned for its fast dynamic response, minimal hysteresis, and exceptional resolution, making it the critical control element in closed-loop systems where position, velocity, or force must be maintained with extreme precision. This valve is a direct-fit replacement for OEM Vickers servo valve installations and is suitable for the most rigorous continuous-duty industrial applications.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Electrohydraulic Servo Valve (Proportional & Servo Valve) |
| Model Designation | SM4-20(15)57-80/40-10-S106 / 3025143 |
| Manufacturer | Vickers (Eaton) |
| Valve Type | Two-Stage, Nozzle-Flapper Pilot with Spool Main Stage |
| Operating Pressure | Standard Industrial Grade (Up to 210 bar / 3000 psi rated) |
| Rated Flow | Nominal 40 L/min at 70 bar per land (dependent on spool configuration) |
| Rated Current | Standard ±10 mA to ±40 mA (torque motor dependent) |
| Hysteresis | < 3% (typical, high-precision null adjustment) |
| Mounting & Connection | Standard ISO 4401 / Vickers Interface (Subplate Mounting) |
| Seal Material | Nitrile (Buna-N) / Fluorocarbon (FKM) Options |
| Filtration Requirement | ISO 4406 Code 16/14/11 or better (High-Pressure Filter Recommended) |
Engineering Features & Advantages
- Precision Performance: The electrohydraulic servo valve (proportional & servo valve) delivers precise, repeatable performance with low hysteresis and stable control across the full working range.
- Industrial Reliability: Designed for dependable long-term operation in demanding industrial environments, with quality bearings and sealing systems ensuring extended maintenance intervals.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original VICKERS standards, allowing straightforward retrofit into existing hydraulic systems without rework.
Typical Industrial Applications
This valve is a direct-fit replacement for OEM Vickers servo valve installations and is suitable for the most rigorous continuous-duty industrial applications.
PRODUCT IMAGES

VICKERS SM4-20(15)57-80/40-10-S106 / 3025143 Electrohydraulic Servo Valve
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
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