Temperature control valves, also known as thermostatic valves, are a typical application of flow regulating valves in the field of temperature control. Their basic principle is to control the inlet flow rate of the primary heat (or cold) medium in heat exchangers, air conditioning units, or other heat- or cold-using equipment to control the outlet temperature of the equipment. When the load changes, the flow rate is adjusted by changing the valve opening to eliminate the effects of load fluctuations and restore the temperature to the set value.