Servo Valves and Specialty Controls

A4000 Single Stage Jet Pipe Servovalve
.4 CIS fuel at 1000 PSID

Single-stage jet pipe servovalves offer reliable 4-way flow control in high temperature, high vibration turbineengine environments. Reduced size and weight provide improved reliability and performance with minimal thermal shift.

  • Contamination Resistance
    Jet pipe pilot stage offers maximum resistance to contamination since it will pass contaminant up to 330 microns (.012 inch) when supply flow is protected by a 150 micron port screen.

  • Improved Performance
    Oversize ports, metering elements and flow passages allow high flow rates with low pressure drop. Thermal shift is minimized by making housing and all metering components of materials having similar coefficients of thermal expansion.

  • Less Weight, Size & Cost
    Result from a parts count 40% less than for ordinary valves. Adhesives and screws are not used because torque motor components are TIG welded in a stainless steel tubular "exoskeleton", combining the torque motor structure and cover. Screws, O-ring and separate aluminum cover normally used are not required. Size and weight are further reduced with an optimized torque motor magnetic circuit to allow the smallest possible envelope consistent with performance.