Vickers | SM4-4037-140-DCITB-10-S7
SM4-40(37)-140-DCITB-10-S7
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The SM4-40(37)-140-DCITB-10-S7 servo valve belongs to the Servo Valves series produced by Vickers and is intended to meter fluid precisely in closed-loop hydraulic automation. Each coil is designed for a rated current of 40 mA, while a resistance of 140 Ω at 21 °C determines the drive signal requirements. Command sensitivity is supported by a 0.5 % threshold and a 3 % hysteresis around null, allowing tight control of spool position. Electrical connection is handled by an MS-3106-14S-2S four-pin plug that simplifies maintenance swaps. A first-stage filter with a 35 µm absolute rating protects internal flight paths, and system oil must reach ISO 4406 class 16/14/11 to maintain stable performance. The valve’s dry weight of 2.8 kg eases manual installation in manifold blocks without hoists.
Pressure capability begins with a minimum supply of 14 bar and extends to a maximum continuous supply of 210 bar, giving designers a broad working range. Structural margins are reinforced by a 315 bar proof pressure and a 525 bar burst rating that protect the housing during sudden surges. The unit remains functional at fluid temperatures up to 135 °C and resists mechanical shocks of 150 g, supporting service on mobile or industrial equipment exposed to vibration. Its mounting pad is finished to 63 µin so sealing surfaces mate reliably, and the port circle diameter is fixed at 44.46 mm to align with standard Vickers manifolds. These limits define envelope, durability, and mounting details necessary for consistent servo performance.
Technical Specifications
Burst Pressure
525 bar
Coil Resistance (per Coil)
140 ohm @ 21 C
Electrical Connector
MS-3106-14S-2S (4 pin)
First-stage Filter Rating
35 µm (absolute)
Hysteresis Around Null
3% of rated current
Maximum Operating Temperature
135 C
Maximum Supply Pressure
210 bar
Minimum Supply Pressure
14 bar
Mounting Surface Finish
63 µin
Port Circle Diameter
44.46 mm
Proof Pressure (supply)
315 bar
Rated Current (per Coil)
40 mA
Recommended Fluid Cleanliness
ISO 4406: 16/14/11
Shock Test Level
150 g
Threshold
0.5% of rated current
Valve Weight (dry)
2.8 kg
1620 Old Apex Road
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