SM4-20(15)57-80/40-10-S182 actuator electro-hydraulic servo valve

Short Description:

SM4-20(15)57-80/40-10-S182 actuator electro-hydraulic servo valve can provide system closed loop control with exact positional accuracy, repeatable velocity profles, and predictable force or torque regulation.
Typical applications include plastic injection molding and blow molding systems, test and simulation equipment, die casting machines, hydraulic press brakes, animation and entertainment equipment, oil exploration vehicles, and lumber machinery.
This model of the high performance SM4 series offers a wide range of rated ﬂows from 3,8 to 76 l/min (1.0 to 20 USgpm) at ∆p of 70 bar (1000 psi).

The SM4 is a two-stage, modular design, ﬂow control valve which can be manifold or subplate mounted. The symmetrical, dual coil, quad air gap torque motor is integrally mounted to the frst stage nozzle ﬂapper pilot valve with six screws. The second stage utilizes a four-way sliding spool and sleeve arrangement with a mechanical null adjust. Spool position is fed back to the frst stage by means of a cantilever spring. An integral 35 micron (absolute) flter reduces sensitivity to contamination of the frst stage.

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Product Detail

actuator electro-hydraulic servo valve

An SM4 servo valve, when used with a hydraulic cylinder, position transducer, and appropriate electronics, can provide infnite cylinder position control to within 0,025mm (0.001 in) or better, depending on the components selected, length of stroke, and load characteristics

When applied with servo hydraulic motors using tachometer feedback and appropriate electronics, the SM4-20(15)57-80/40-10-S182 actuator electro-hydraulic servo valve provides infnite proportional ﬂow control for real-time velocity/acceleration profles. The resulting closed loop system can be error corrected to within one-tenth of a revolution per minute. With appropriate pressure transducers or load cells in force control applications, the SM4 makes possible exact load pressure/force control. In addition, excellent system stability with pressure and load to ±1% full scale can be achieved.

Features and Benefts

• The wide range of servo valve SM4-20(15)57-80/40-10-S182 ﬂow capabilities allows selection of the valve size best suited for an application
• The high strength aluminum alloy of the second stage valve body means lighter weight with rugged durability.
• Higher frequency response is available on request to provide enhanced system bandwidth for critical performance requirements.
• The spool and sleeve are hardened stainless steel to minimize wear and erosion. The O-ring mounted sleeve eliminates spool binding and ensures smooth operation.