1, low temperature medium piping systems and devices, appropriate chooses plus bonnet low-temperature needle type valves.
2, refining installation of catalytic cracking unit of pipeline system, can choose lifting lever type adjustable needle valve.
3, chemical system soda acid corrosiveness device and pipeline system, appropriate chooses austenitic stainless steel manufacturing, ptfe for seat sealing the stainless steel needle type valves.
4, metallurgical, power system, petrochemical plant, urban heating system of high temperature medium pipeline system or device, can choose the metal to metal seal needle type valves.
5, need to adjust the discharge, can choose worm gear and worm drive, pneumatic or electric with v-shaped openings adjusting needle type valves. 6, oil and gas transmission pipeline competent line, need cleaning, and for buried in the ground, the choice of sizes, full of welded structure needle type valves, Buried in the ground, choose full-bore welding connection or flange connection ball valves.
7, oil conveying pipeline and storage equipment, selects the needle valve flange connection type.
8, city gas and gas pipelines, choose flange connection and threaded connections needle type valves.
9, metallurgical oxygen pipeline system, appropriate chooses through strict defatted processing, flange connection needle type valves.

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