For general installation positions, most of them are installed near the warm air tank under the dashboard of the cab, or above the warm air pipe in the running water tank of the engine compartment, and some of them are installed above the warm air pipe behind the cylinder head.
The function of the warm water valve is to control whether the hot water in the engine flows through the warm air radiator box, which is used to control the heating and cooling of the automobile air conditioning warm air system. The rotation of the valve stem is used to adjust the temperature of the outlet water, play a role in reversing the temperature and heating the car.