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The curve below demonstrates what you would see if you graphed the performance of one of our thermal actuators. Our expansion curves graphically display an actuator’s performance as it heats up and cools down. Hysteresis is defined as the differential between the graphed upstroke and down stroke, this differential is caused by the thermal inertia within the actuator.
When heated, the wax enclosed in the cup, expands and pushes against the diaphragm, the movement is transmitted via the plug to the piston. The guide
maintains the diaphragm, and allows the plug and piston to slide freely.An external spring ensures the return of the.Piston when cooling down.
When heated, the wax in the cup expands and the pressure applies, via the sleeve, both a radial force and an axial force on the piston.Again, an external spring ensures the return of the piston when the temperature decreases.
