Vickers | SM-4037-140-DCLTA-10-S7
SM-40(37) 140-DCLTA-10-S7
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The SM-40(37) 140-DCLTA-10-S7 is produced by Vickers within the Servo Valves series. The unit controls hydraulic actuator position and velocity by metering flow in response to electrical coil input, allowing precise automation tasks. It operates with supply pressures from 14 bar (200 psi) to 210 bar (3000 psi), covering low-force bench testing up to full industrial pressure lines. At 70 bar the valve passes 37 US gpm (140 l/min) to match medium-capacity cylinders. Each torque motor coil draws a rated 40 mA and presents a nominal resistance of 140 Ω at 21 °C, giving predictable drive requirements for standard servo amplifiers. The four-pin MS-3106-14S-2S connector provides the electrical interface and simplifies cable replacement in the field. A 35 µm absolute integral pilot filter protects internal orifices from contamination and maintains long-term accuracy. Continuous duty is permitted up to 135 °C (275 °F), so the device remains stable near hot manifolds.
The hydraulic interface is arranged on a 44.46 mm (1.75 in) port circle so bolt-on mounting aligns with common manifold patterns, and sealing is completed by a single AS568-018 O-ring measuring 1.78 × 18.77 mm ID. Dry weight is 2.8 kg (6.2 lb), allowing manual installation without lifting gear. Electrical sensitivity is tight; a threshold of 0.5 % of rated current initiates spool movement, while hysteresis around null is limited to 3 % of the same current to reduce deadband in closed-loop control. Pressure containment meets demanding safety margins: the supply port withstands 150 % of maximum supply pressure, the return port holds 100 %, and with the return open the assembly survives a burst load equal to 250 % of the maximum supply. These margins ensure the valve maintains structural integrity during pressure spikes in dynamic servo systems.
Technical Specifications
Burst Pressure (return Open)
250% of max supply
Coil Resistance (nominal)
140 Ω (21 C)
Connector
MS-3106-14S-2S (4-pin)
Hysteresis Around Null
3% of rated current
Integral Pilot Filter
35 μm (absolute)
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)
Port O-ring
AS568-018 (1.78 x 18.77 mm ID)
Rated Coil Current
40 mA (per coil)
Rated Flow (70 Bar)
37 USgpm (140 l/min)
Return Port Proof Pressure
100% of max supply
Supply Port Proof Pressure
150% of max supply
Threshold
0.5% of rated current
Weight (dry)
2.8 kg (6.2 lb)
1620 Old Apex Road
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