Introduction To Thermostatically Controlled Valve

The Alfa Laval Thermostatically Controlled Valve is operated by means of an output air signal that controls the valve actuator. If the set temperature differs from the actual operating temperature (measured at the sensor), the screw in the dial button should be loosened, the button set point at the measured temperature, and then the screw should be tightened again. The working rate of the thermostat can be changed by loosening the inlet throttle screw (max 1/6 revolution). This will result in faster activation of the membrane valve and reduce any movement. The thermostat can be adjusted instantly, switching from direct-acting mode to reverse acting mode by exchanging the spring and the adjustment screw on the rocker arm (see drawing).