1.Casting and forging body;
2.The seat with metal to metal can widely be used, which can meet the wider range of temperature;
3.The disc can select the design of upside or downside as per actual status;
4.Easy to operate, reliable operating, and long life cycle;
5.The seal surface is corrosion resistant and flush resistant with reliable seal;
6.Several operating methods, such as manual, gear, pneumatic, electric, hydraulic, etc.