In recent years, some districts in Beijing have some imbalances in water quality and serious thermal imbalance. The resistance loss of the near-end residential area is small. The water supply is short-circuited back to the thermal power station, causing the near-end user room temperature. The incidence of complaints is high. This year, Tongzhou some communities, such a problem occurred, although the design of the pressure balance valve and the flow balance valve, but the proximal room temperature?, Remote low temperature remains unresolved. Thermal balance valve can effectively solve the above problems, the use of some cells excellent results. Its working principle is through the test of hot water temperature through the valve body, the use of thermal expansion and contraction of the characteristics of materials, automatic opening or closing the valve opening, which automatically adjust the water flow, high water temperature, the flow through the valve Small or even closed; water temperature is low, the water flow is large, and even the valve is fully open, this change is with the temperature changes. The heat balance valve is installed on the backwater pipe of the heating system to automatically adjust the water flow according to the backwater temperature to avoid direct short circuit of the high temperature water to the backwater pipe to ensure the hot water in the water supply pipe can reach the far end to fully utilize the heat energy and save energy. And the thermostat valve on the handle can be adjusted and set the backwater temperature at any time, the use of handheld infrared thermometer test return pipe wall temperature can be back to the water temperature data, easy to adjust the backwater temperature. In the past, most of the household pipelines used single-pipe tandem design. The application of self-operated heat balance valve was limited and was mostly used to solve the heat balance problem between buildings. Due to the lack of understanding of the performance of the heat balance valve, heating in the heating system is often not heating After balancing the problem, use it as a remedy. Therefore, the manufacturer only produces more than 40mm large caliber thermal balance valve, used for thermoelectric, pharmaceutical, petrochemical and other industries. Now the home heating system pipelines in parallel implementation of double pipe in the heating system design and more in the water supply pipeline set up a variety of balance valve; in the design, the backwater pipe set heat balance valve, by controlling the temperature and Flow, thereby controlling the inflow, instead of pressure (flow) balance valve, can play a multiplier effect.