Hard sealing ball valves are used in oil, natural gas, coal mining, oil refining processing and pipeline transmission systems; used in chemical products, medicine and food production; used in hydropower, thermal power and nuclear power production systems; used in urban and industrial enterprises for water supply and drainage, water supply Heat and air supply system; used in farmland drainage and irrigation system; used in gold production system, it is an important mechanical product closely related to production and construction, national defense construction and people's life.

1. Low flow resistance;

2. Simple structure;

3. Small size and light weight;

4. At present, the sealing surface of the ball valve is made of plastic, and the sealing performance is good;

5. Simple operation, quick opening and closing, and easy remote control;

6. It is easy to maintain, and the sealing ring is generally movable, which is easy to disassemble and replace;

7. When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and the passage of the medium will not cause corrosion of the sealing surface of the valve.

The hard sealing ball valve is an eccentric metal sealing structure, the sealing form is metal to metal sealing, the metal sealing is switchable metal sealing ring to metal sealing, stainless steel plate and graphite composite plate sealing ring to metal sealing. In addition to the electric drive, the hard-sealed butterfly valve also includes: manual, worm gear drive, pneumatic, etc. The valve is generally installed horizontally. The butterfly plate of the hard seal ball valve is installed in the diameter direction of the pipeline.

In the cylindrical passage of the hard-sealed ball valve body, the ball rotates around the axis, and the rotation angle is between 0 ° and 90 °. When it rotates to 90 °, the valve is fully opened. At present, the hard-sealed ball valve is used as the component to realize the switch and flow control of the pipeline system, and it has been widely used in the fields of petroleum, chemical industry, metallurgy, hydropower and so on.