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All-Electric Rotary Actuators

The all electric rotary actuator (RAX) can be used with several types of valves to create a common platform for fuel valves, bleed air valves, and almost any high precision actuated control requirement. It is a technologically advanced rotary product designed with unique features and high performance capabilities.

The rotary actuator is self contained, with an on board controller, providing high performance intelligent technologies that produce highly efficient, repeatable control that enables today’s complex engine systems. The self contained design allows for easy installation as it does not require a separate junction box and wiring to the motor control.

The all-electric actuators internal health-monitoring software provides fault and over-temperature information along with real-time motor current, voltage, temperature, and position tracking information that can be monitored using the standard, isolated RS485 interface or the optional Ethernet interface. The on-board electronics contain a built–in analysis data software, allowing for a user friendly problem solving mechanism.

The RAX actuation mechanism utilizes robust, compact planetary gearing to offer multiple output levels in a common package with provided mounting provisions. The RAX is highly reliable with extreme accuracy and less “moving” parts providing lower maintenance and down time costs. Advanced modeling techniques and state-of-the-art CAE tools are employed to achieve the RAX’s robust design and performance objectives.

The RAX family of products is available in multiple configurations. We use the new actuator body mated to a choice of a 1”, 1.5”, or a 2” (consult factory for other options) common gas valve sizes to form the Rotary Gas Valve (RGV). The RGV allows for mille second response time to fuel demand changes, and a flow accuracy of better than 1% full scale. The RGV provides for fail safe operation with its built in spring return and self monitoring onboard electronics. The valve has a class IV leakage rating in both forward and reverse directions. All leading to maintenance free operation for higher reliability and reduced maintenance costs.

The RAX is also offered as a rotary bleed air valve (RBV), which is capable of controlling high air temperatures up to 1100°F. It helps maintain a precise fuel/air ratio within the turbine, enabling it to achieve a smoother, more accurate performance – better than 1% of FS. The RBV is available in three common nominal sizes, 3”, 4”, and 6”, all offering exceptionally high flow capabilities while still providing excellent shut off characteristics. Each valve integrates a fail-safe spring designed to fail open or fail close, depending upon desired action. The RBV response time measures 100 to 500 ms, allowing for quick pressure control.

The all new, fully electric, rotary actuator from Precision Engine Controls will respond to your every motion even in the harshest environments.