A Hydraulic Servo Valve is a device that meters the flow of oil in response to an electrical input signal or command  to control position, velocity, pressure or force in some type of machine or device (usually through a piston or cylinder). Servo Valves are closed-loop control devices that can be single stage, two-stage or three stage designs.
Moog is a leader in designing, manufacturing, and selling high performance hydraulic valve products. With over 60 years experience producing servo and proportional valves for the industrial market, our products are legendary for reliability and accuracy.  Moog valves contain either a mechanical or electrical feedback mechanism.
Designed and built to meet the unique needs of even the most demanding customers, we offer numerous models with a range of sizes, performance characteristics and mounting options.
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