The GAIRUI Stainless Steel Blow-down Valves is an important part of the instrument measuring pipeline system, mainly with cut-off valve and ball valve, its function is to open or cut off the pipeline access, the needle type valve has the convenient installation and disassembly, the needle type valve connection fasten, the needle type valve is beneficial to the fire protection, the needle type valve has high explosion proof and pressure resistance, and the needle type valve seal performance is good and so on. Point is a kind of advanced connection valve in power plant, refining, chemical plant and instrument measuring pipeline.