Top installed ball valves are new products developed upon the anvanced technology and through many years of the designing and manufacturing experience of ours.With technology up to domestic leading level.these products can compete with the international coumterparts.Besides the features borne by the sied installed fixed ball valve, they are also given the features below:


1. One piece valve body, top installed trunnion to fix and support, flanged or butt welded structure;
2. Inconel bellows spring makes the sealed metal seat moving toward the ball, providing the two way seal function of inlet and outlet;
3. Distinctive technology of retractable valve seat, in line replace ability of ball arm, valve stem sealing ring, metal seat and bellows spring, and torque down to the minimum for the ease of operation;
4. Ease of repair and installation, long performance life, access for repair and replacement of trims may be done with no need to remove the valve from the pipeline, thus to lengthen the service life;
5. Low torque, reliable sealing, and spherical seat different from ordinary ball valves, which can automatically adjust the position of seal;
6. Preset platform and bolt holes for drive device, and to ISO 5211. Drive device can be installed according to users' different requirements;
7. DBB(double block and bleed) function;
8. Hand operated top installed ball valve adopts high strength one-piece ball arm structure to ensure the precise positioning of the ball;
9. Anti-blowout protective structure of valve stem to enhance the operational safety of the valve.