Subplate or manifold mounted, Eaton Vickers SM4 and SX4 servo valves have a symmetrical design that provides inherently dependable metering of control flow with minimum null shifts for more consistent machine operation. These two-stage modular flow control valves provide infinite cylinder position control to within 0,025 mm (0.001 in) or better, as well as infinite proportional flow control for real-time velocity/acceleration profiles when applied with servo hydraulic motors, tachometers and electronics.
The spool and sleeve are hardened stainless steel to minimize wear and erosion. High-strength aluminum alloy parts are extremely durable yet lightweight. An integral 35-micron absolute filter reduces sensitivity to contamination.
The flexibility of a standardized port circle and mounting pattern, with available adapter manifolds, make SM4 and SX4 servo valves an affordable way to enhance hydraulic systems.
Our SM4 line features more variation to help you find the perfect fit for your application. The SX4 is our highest performance servo valve, which offers the following advantages: