Crescent valves manufacturing company offers a range of ball valves in variety of reduced bore and full bore. These ball valves are available in floating ball end entry for lower pressure and trunnion type top entry for higher pressures and sizes. The trunnion type top entry ball valves are made of ball and seal bearing metallic seats through top of the body to allow free access to all internals without removing the valve from the line. This advanced technolog y facilitates checking, adjustment and replacement operations. The trunnion ball valves can resist the forces due to line pressure taken by trunnions and bearings and limits comprehensive ball seals thus reducing the turning torque. These top entry type ball valves are available with adjustable screwed upstream and downstream metallic seats which gives differential pressure and a double seal effect with automatic decompression in the event of overpressure developing in the dead chamber. The company manufactures these ball valves with a fire-safe technic.
