The function of any valve is to cut off the fluid. According to the difference of the valve core, it can be divided into globe valve, gate valve, plug valve, ball valve, butterfly valve, needle valve and so on. Needle valve shape can withstand more than other types of valves. Large pressure, good sealing performance, so it is generally used for small flow, higher pressure gas or liquid medium sealing. Needle valve shape and pressure gauge are the most suitable for any valve function is to cut off the fluid. According to the difference of the valve core, it can be divided into globe valve, gate valve, plug valve, ball valve, butterfly valve, needle valve and so on. Needle valve shape can withstand greater pressure than other types of valves and has good sealing performance, so it is generally It is used for the sealing of gas or liquid medium with smaller flow and higher pressure. The needle valve shape is the most suitable for use with pressure gauge. The general needle valve shape is made of threaded connection. Nominal pressure: PN2.5 PN4 PN6.4 PN16 PN32Mpa Nominal diameter: DN5～DN25 Applicable medium: oil, water, gas and other non-corrosive or corrosive media Applicable temperature: -20℃～+440℃ -70℃ ～-240℃ ≤540℃ ≤570℃ and other materials: 20#, 1Cr18Ni9Ti, 304, 316, 316L, 12Cr1Mov and other external threaded needle valve, internal threaded needle valve, angle needle valve, needle valve, JJM1 Needle valve, JJM8 needle valve, LJ21W needle valve
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