J21E-25P stainless steel needle valve needle valve is a precise adjustment of the valve wider use, such as flame cutting with the cutting away from the knob to adjust the flame temperature is the needle valve, needle valve of the instrument is the instrument measuring pipeline system an important part of the main shutoff valve and ball valve, its purpose is for open or cut off the pipeline path with. The role of any valve is to cut off the fluid. Depending on the spool can be divided into the valve, gate valve, plug valve, ball valve, butterfly valve, needle valve and so on. Needle valve spool is a very tip of the cone, as if the needle, the same insert seat, hence the name. Needle valve shape than other types of valves that can withstand greater pressure, good sealing performance, it is generally used for small flow, high pressure gas or liquid medium, sealed needle valve shape and pressure gauges used in conjunction with is the most appropriate needle valve shape made of threaded connections. Nominal pressure: PN2.5 PN4 PN6.4 PN16 PN32Mpa public, said diameter: DN5 ~ DN25 Applicable medium: oil, water, gas and other non-corrosive or corrosive medium Suitable temperature: -20 ℃ ~ +440 ℃ -70 ℃ ~ -240 ° C ≤ 540 ° C ≤ 570 ℃, the material: 20 #, 1Cr18Ni9Ti, 304, 316, 316L, 12Cr1Mov 
 The parameters of the needle valve 
 Nominal diameter 6 ~ 40mm 
 Pressure range 1.6 ~ 32.0MPa 
 The application of media, water, oil, steam, LPG, etc. 
 Manufacturing standards for the ANSI JIS