Hard seal ball valve, manual cast steel hard seal ball valve body surface adopts advanced spraying technology, through the treatment of different working conditions, the highest hardness can reach HRC78. Seat sealing faces are handled for maximum hardness up to HRC72. The BALL AND SEAT ARE GROUND IN pairs, and ALL sealing areas of the entire sealing face of the ball valve are precision ground. Suitable for high temperature and high pressure water, steam, oil, coal, fiber, thick and corrosive media, as well as media with particles. Metal seal ball valve has floating ball and fixed ball two kinds of structure metal seat ring and spherical contact, through acting on the seat ring uniform spring load to make the seat ring and spherical seal.

Due to the action of the spring load, the auxiliary seal expands to realize the seal between the valve body and the seat. The SPRING LOAD IS SUFFICIENT TO PROVIDE a RELIABLE SEAL BETWEEN the SEAT and the BALL. Under low pressure conditions, a seal grease injection system can be designed between the seat sealing face and the ball.