Reliability – The model 410 jet-pipe servovalve has a single inlet first stage, making it a fail-to-center design. There is no risk of unbalance from contamination because there is only a single source of fluid for the first stage. Our second-stage spool design is capable of generating more than 100 pounds of chip shear force (with a nominal 3,000 psi system).

Contamination resistance – Unique jet construction enables most designs to receive and pass particles as large as 200 microns without malfunction.

Low sensitivity to vibration and shock – First stage is balanced and supported along all three axes against the effects of lateral acceleration and vibration. Acceleration and vibration tests show almost no effect on load output from 0 to 3000 Hz.

Stability – The high-velocity, first-stage jet flow impinges onto a rigid receiver, solidly mounted in the second stage, and does not impinge on the mechanical feedback element. The rigid connection of the mechanical feedback element to the second-stage spool eliminates a wear point and reduces high gain at null.

Null bias stability – Through symmetrical torque motor design and all welded/brazed construction, null shift resulting from vibration, temperature, and other environmental factors is minimized.

Low maintenance – No filter replacements are required. First-stage oil passes through a single 90-micron screen that is easily removable for inspection without disassembling the valve.

Servo-controlled second stage – The second-stage spool is precisely controlled by a high-gain, position-feedback servo-loop. Pressure balance and high force gain of the hydraulic first stage prevents displacement of the second-stage piston caused by any unexpected disturbance.

Wide dynamic range – Characteristics of phase and amplitude versus frequency are virtually the same for inputs ranging from a few percent points to 50 percent of full flow.

Dry torque motor – The hermetically sealed torque motor is completely isolated from the hydraulic fluid.

Reduced life cycle cost – The jet-pipe servovalve's rugged construction and unique design result in an overall lower life-cycle cost as well as unsurpassed reliability when compared to other designs.

This valve is certified for use in hazardous locations.
Non-incendive protection: Class1, division 2, groups A, B, C, D - T135
Certification: NI / 1 / 2 / ABCD / T3C Ta=135°C

Aerospace and PowerGen Electrohydraulic Servovalve Three-/Four-Way