For the pipelines and storage equipment of refined oil, ball valves with flanged connnections need to be selected.
In the pipeline system and device of low temperature medium, the low temperature ball valve with extended bonnet should be selected.
On the pipeline system of the catalytic cracking unit of the refinery unit, the lifting stem type ball valve can be selected.
When flow adjustment is required, a worm-driven pneumatic ball valve or electric V-shaped regulating ball valve can be selected.
In the oxygen pipeline system in the metallurgical system, it is advisable to choose a trunnion mounted ball valve with flanged connection that has undergone strict degreasing treatment.
On the pipelines of city gas and natural gas, a floating ball valve with flanged connection and internal thread connection, or a trunnion ball valve can be selected.
In the device and pipeline system of corrosive medium such as acid and alkali in chemical system, all stainless steel ball valves made of austenitic stainless steel with PTFE as the valve seat sealing ring should be selected.
Metal-to-metal sealing ball valves can be used in pipeline systems or devices of high temperature medium in metallurgical systems, power systems, petrochemical plants, coal direct liquefied oil plants, and urban heating systems.
For oil and natural gas transmission main lines, if the pipeline needs to be cleaned and needs to be buried underground, choose a full bore and full welded structure ball valve; if it is buried on the ground, choose a full bore ball valve with welded connection or flanged connection; For branch pipes , choosea full-bore or reduced-bore ball valve with flanged connection or welded connection.