principles of ball valves
1, oil, natural gas transmission mains, need to clean the pipeline, but also to be buried in the ground, use full bore, motorcycle parts full welded structure; laid in the ground, select the full bore welded connection or flange connection valve; branch, the choice of flanged, welded connections, full bore or reduced bore BALL VALVES.
2, the refined oil pipelines and storage equipment, the choice of flanged ball valves.
3, town gas and natural gas pipeline, use the threaded flange and the floating ball.
4, metallurgical oxygen system piping systems, degreasing treatment should be selected through strict, fixed flange ball valve.
5, low temperature piping systems and media devices, should use low-temperature china fastener with the valve cover.
6, oil refining device of the catalytic cracking unit of the pipeline system, the choice of lift rod ball.
7, the chemical system, pH and other corrosive media devices and piping systems, should use of austenitic stainless steel, and Teflon stainless steel ball valve seat ring.
8, metallurgy, power systems, petrochemical plants, urban heating system piping hot medium or device, the choice of metal to metal sealing display stand.
9, the need for flow control may make use of worm gear, pneumatic or electric with a V-shaped openings of the regulator valve