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Tope installed ball valves are new products developed upon theadvanced technology abroad and through many years of the designingand manufacturing experience of ours. With technology up todomestic leading level, these products can compete with theinternational counterparts. Besides the features borne by the siedinstalled fixed ball valve, they are also given the featuresbelow:
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 towardthe ball, providing the two way seal function of inlet andoutlet;
3. Distinctive technology of retractable valve seat, in linereplace ability of ball arm, valve stem sealing ring, metal seatand bellows spring, and torque down to the minimum for the ease ofoperation;
4. Ease of repair and installation, long performance life, accessfor repair and replacement of trims may be done with no need toremove the valve from the pipeline, thus to lengthen the servicelife;
5. Low torque, reliable sealing, and spherical seat different fromordinary ball valves, which can automatically adjust the positionof seal;
6. Preset platform and bolt holes for drive device, and to ISO5211. Drive device can be installed according to users' differentrequirements;
7. DBB(double block and bleed) function;
8. Hand operated top installed ball valve adopts high strengthone-piece ball arm structure to ensure the precise positioning ofthe ball;
9. Anti-blowout protective structure of valve stem to enhance theoperational safety of the valve.
