The life of the drain valve is related to three factors: one is the quality of the drain valve itself, and the other is the operating condition of the drain valve; and the third is whether the drain valve is properly installed and maintained. The quality of the drainage valve itself is related to the raw material, structure, and treatment process of the valve. The use of engineering ceramic materials can effectively improve the wear resistance and corrosion resistance of the valve. The treatment uses many methods of heat treatment and surface hardening. Can improve performance and service life; Drainage prevention of the situation we have no choice, can only say that the selection must be selected to suit their working conditions; the correct installation of the drainage valve, and the correct operation and maintenance of the drainage valve is also Can increase the service life of the drain valve.