Rotary Thermal Actuator (Sample)

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Product Description


The Rotary Thermal Actuator shown was used to cover an access hole when in the “cold” position then rotate away and expose the access hole when the desired “hot” temperature was reached then rotate back to its initial position when the temperature was reduced back to its “cold” value.

The housing contains a thermal actuator utilizing a thermal material that responds to temperature. Upon reaching the active temperature range the thermal material changes phase from a solid to a liquid increasing in volume causing a piston to extend outward driving a linear-to-rotary motion mechanism which rotates the cover accordingly. Upon temperature reduction to below the active range the thermal material changes phase from a liquid to a solid causing a decrease in volume which causes the actuator piston to retract rotating the cover back to its original position.