Selection principles stainless steel needle valve

Selection principles stainless steel needle valve
1, the pipeline system and cryogenic medium, should use low temperature plus bonnet needle valves.
2, the pipeline system FCCU refining apparatus, the choice of needle valve lift rod.
3, apparatus and piping systems of chemical systems and other corrosive acid medium, should use austenitic stainless steel, Teflon seat ring of stainless steel needle valve.
4, metallurgy systems, piping systems or devices on power systems, petrochemical plants, urban heating systems in high-temperature media, the choice of metal to metal seal needle valve.
5, the need for flow regulation, the choice of the worm gear, pneumatic or electric with a V-shaped opening regulating needle valve.
6, transmission mains oil, natural gas, the need to clean the pipeline, and the need for laying in the ground, use full bore, all-welded structure of the needle valve; buried in the ground, select full bore welding connection or flange connection The ball valves.
7, transmission pipelines and oil products storage facilities, the choice of the needle valve flange connection.
8, city gas and natural gas pipelines, the choice of the needle valve flange connection and female connection.
9, metallurgical oxygen piping system, should use rigorous degreasing treatment, needle valve flange connection.