Vickers | SM44030113805010
SM440(30)11380/5010
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The SM440(30)11380/5010 servo valve is manufactured by Vickers in the Servo Valves series and regulates hydraulic flow for automated motion control. It meters 113 l/min (30 US gpm) to keep actuators supplied under rated conditions, and the 44.46 mm (1.75 in) port circle diameter matches common manifold layouts. The assembly handles supply lines up to 210 bar (3000 psi) and endures 150 % of that level as supply proof pressure for transient protection. Its torque motor requires 50 mA through an 80 Ω coil to generate the magnetic force that shifts the spool. Command signals are delivered by an MS-3106-14S-2S four-pin connector that locks securely against vibration. Dynamic behavior is characterized by a 20 ms 100 % step response, a –3 dB frequency limit of 25 Hz, and a 90° phase frequency of 42 Hz, enabling rapid correction in closed-loop servo circuits.
Proper operation begins at a minimum inlet pressure of 14 bar (200 psi) so the spool remains centered and responsive. The return side tolerates full-pressure proof loading equal to the maximum supply and withstands burst events up to 250 % of that value, maintaining enclosure integrity during pressure spikes. Continuous duty is possible at fluid temperatures as high as 135 °C (275 °F), supporting installations near heat sources. Control accuracy is sustained because hysteresis around the null point is limited to 3 % of rated current, while overall linearity error stays below 10 % of rated current, allowing precise positioning and force regulation in hydraulic automation.
Technical Specifications
100% Step Response
20 ms
Coil Rated Current
50 mA
Coil Resistance
80 Ohms
Electrical Connector
MS-3106-14S-2S (4 pin)
Frequency Response (-3 Db)
25 Hz
Frequency Response (90°)
42 Hz
Hysteresis Around Null
3% (of rated current)
Linearity Error
<10% (of rated current)
Max Operating Temperature
135 C (275 F)
Maximum Supply Pressure
210 bar (3000 psi)
Minimum Supply Pressure
14 bar (200 psi)
Port Circle Diameter
44.46 mm (1.75 in)
Rated Flow
113 l/min (30 US gpm)
Return Burst Pressure
250% max supply
Return Proof Pressure
100% max supply
Supply Proof Pressure
150% max supply
1620 Old Apex Road
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