Principle Of Selecting Ball Valve

1. The main line for the transportation of oil and natural gas, which needs to be cleaned of the pipeline, and which needs to be buried underground, use a ball valve body with full-diameter and all-welded structure; if it is buried on the ground, choose a ball valve with full-diameter welded connection or flange connection. ; branch pipe, flange connection, welded connection, full diameter or reduced diameter ball valve.

Second, the delivery pipeline and storage equipment of the refined oil, the ball valve connected by flange is selected.

Third, the city gas and natural gas pipelines, the use of flanged and internal threaded floating ball valve.

Fourth, the oxygen pipeline system in the metallurgical system should be selected after strict removal

5. For low temperature medium piping systems and devices, a low temperature ball valve with a bonnet should be used.

6. On the pipeline system of the catalytic cracking unit of the refining unit, a lifting rod type ball valve may be selected.

7. In the equipment and piping system of acid and alkali and other corrosive media of chemical system, it is preferred to use all-stainless steel high pressure AISI304 ball valve made of austenitic stainless steel and PTFE as valve seat seal.

8. Metal-to-metal sealed ball valves may be used on the piping systems or devices of high-temperature media in metallurgical systems, power systems, petrochemical plants, and urban heating systems.

When the flow adjustment is required, a worm-gear-driven, pneumatic or electric adjustment ball valve with a V-shaped opening may be selected.