Vickers | SM44040151804010
SM440(40)15180/4010
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The SM440(40)15180/4010 is an electrohydraulic control unit from Vickers in the Servo Valves series and is applied to meter fluid for automated motion control. At 70 bar differential it supplies a rated flow of 151 l/min (40 US gpm), delivering the volume needed for medium-size actuators. A minimum supply pressure of 14 bar (200 psi) keeps the spool stable when demand is low, while a maximum supply pressure of 210 bar (3000 psi) sets the continuous working ceiling. The supply port is proof-tested to 315 bar and the return port to 210 bar to confirm structural integrity before service. Return lines can withstand 525 bar burst pressure, guarding against hose rupture during sudden surges. An integral 35-micron absolute filter captures contaminants that would erode land edges. Dry weight is 2.8 kg (6.2 lb), so the unit mounts directly on a manifold without external bracing.
Each magnetic coil draws 40 mA rated current, providing a predictable load for the drive amplifier, and the 80-ohm coil resistance limits self-heating at that setting. A MS-3106-14S-2S four-pin connector forms the electrical interface, allowing quick plug-in replacement. The 0.5 % threshold defines the smallest command that will shift the spool, supporting fine positioning. Hysteresis around null is held to 3 % of rated current so the valve returns to center with minimal offset. Linearity error is limited to 10 % and symmetry error is also capped at 10 % of rated current, bounding gain variation across the control range. The assembly tolerates temperatures up to 135 °C (275 °F), enabling installation near hot hydraulic power units without derating.
Technical Specifications
Burst Pressure (return Open)
525 bar
Coil Resistance (per Coil)
80 ohms
Electrical Connector
MS-3106-14S-2S (4 pin)
Hysteresis Around Null
3% of rated current
Integral Filter Rating
35 micron (absolute)
Linearity Error (max)
10% of rated current
Maximum Operating Temperature
135 C (275 F)
Maximum Supply Pressure
210 bar (3000 psi)
Minimum Supply Pressure
14 bar (200 psi)
Proof Pressure (return Port)
210 bar
Proof Pressure (supply Port)
315 bar
Rated Current (per Coil)
40 mA
Rated Flow (@70 Bar)
151 l/min (40 USgpm)
Symmetry Error (max)
10% of rated current
Threshold
0.5% of rated current
Weight (dry, -10 Design)
2.8 kg (6.2 lb)
1620 Old Apex Road
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