The company's patented product never leaks the temperature control valve core, adopts four imported EPDM high temperature resistant, anti-aging O-rings, and then adds the top pressure cap packing structure. The packing is made of high temperature resistant and wear resistant polytetrachloroethylene. . Even if all four O-rings are damaged during use, it is easy to solve the problem of maintenance difficulties caused by leakage of the product during the heating season by pressing the cap.