Single head bolt length=flange thickness * 2+valve length+nut thickness+gasket thickness+5mm. Double head bolt length=flange thickness * 2+valve length+nut thickness * 2+gasket thickness+10mm. Ball valves and gate valves belong to the same type of valve, with the difference being that their closing element is a sphere that rotates around the valve body centerline to achieve opening and closing. Ball valves are mainly used in pipelines to cut off, distribute, and change the flow direction of media. The flange ball valve standard GB/T21465-2008 "Valve Terminology" defines it as a valve whose opening and closing member (ball) is driven by the valve stem and rotates around the axis of the valve stem.

 

Working principle of clamp ball valve

 

The clamp ball valve has a simple structure, small volume, and light weight, consisting of only a few parts. And it can be quickly opened and closed by simply rotating 90 °, with simple operation, and the valve has good fluid control characteristics.

 

Structural characteristics of clamp ball valve:

 

① The eccentric * special design ensures frictionless transmission between the sealing surfaces, extending the service life of the valve.

 

② Elastic sealing is generated by torque.

 

③ The clever wedge-shaped design enables the valve to have an automatic sealing function that becomes tighter as it is closed, with compensatory and zero leakage between the sealing surfaces.

 

④ Small size, light weight, easy operation, and convenient installation.

 

How to calculate the length of fasteners for flange ball valves and clamp ball valves?

 

⑤ Pneumatic and electric devices can be configured according to user requirements to meet the needs of remote control and program control.

 

⑥ Changing the material of the parts can be applied to various media and can be used for lining anti-corrosion (lining F46, GXPP, PO, etc.).

 

⑦ Diversified continuous structures: clamps, flanges, and butt welds.