1.The body has uniform structure, more density and higher strength integrity;

2.Fully guided disc with stellite faced surface prevent effects of side thrust;

3.The stellite faced seat provides maximum resistance to wear and abrasion due to extreme changes and piping loads;

4.Stem sealing ensures lowest fugitive emission and less maintenance under frequent cycling;

5.The structure of disc can be designed into stop-check type, standard flat disc, swivel plug and need type, offering different flow characteristic;

6.Bypass valves are available to cope with over pressurization and pressure locking;

7.Impactor handwheel, worm gear and actuators provide more reliable forces to open and close under extreme pressure and temperature.