SZH series thermostatic mixing valves are suitable for hot water system, electric water heater, solar water heater and supply hot water system. Equipped with electric and solar water heater, the mixing valve can be designed to provide a solution for washing rooms with variable hot and cold water. Temperature of cold/hot and mixing water can be adjusted by users individual requirements where the temperature required is achieved quickly and keep the outlet temperate constant instead of variable by water temperature, flow-rate and water pressure. The mixing valve can also turn off hot water automatically in several seconds to protection when cold water is not supplied at the moment.