Introduction to the principle of selection of flange ball valves in various industries

Flange ball valve not only has simple structure and good sealing performance, but also has small volume, light weight, less material consumption, small installation size, small driving torque, easy operation and quick opening and closing in a certain nominal diameter range. It is one of the fastest growing valve varieties in the past decade.
Japanese standard flange ball valve
The principle of selection of flange ball valves in various industries:
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 flange ball valve with full diameter and all welded structure; if it is buried on the ground, choose full-diameter welded connection or flange connection. Flange ball valve; branch pipe, flange connection, welded connection, flanged ball valve with full or reduced diameter.
Second, the delivery pipeline and storage equipment of the refined oil, flanged ball valve connected by flange.
Third, the city gas and natural gas pipelines, the use of flanged and internal threaded floating ball flange ball valve.
4. On the oxygen pipeline system in the metallurgical system, a fixed ball flange ball valve that has undergone strict degreasing treatment and flange connection should be used.
5. For the piping system and equipment of the low temperature medium, a low temperature flange ball valve with a bonnet should be selected.
6. On the pipeline system of the catalytic cracking unit of the refining unit, a lifting rod type flange ball valve may be selected.
7. In the equipment and piping system of corrosive medium such as acid and alkali in chemical system, it is preferred to use all-stainless steel flange ball valve made of austenitic stainless steel and PTFE as valve seat sealing ring.
8. Metal-to-metal sealing flange 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.
9. When flow adjustment is required, a worm-gear-driven, pneumatic or electric adjustment flange ball valve with a V-shaped opening may be used.