Needle valve
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What exactly is a needle valve? Is its nominal pressure 1.6 MPa or 16 MPa? I heard today that the lowest nominal pressure for needle valves is 16 MPa, with no such thing as 1.6 MPa; I’m not sure if what that person said is correct
Parameters: Nominal diameter 6–40 mm; Pressure range 1.6–42.0 MPa. Applicable media include water, oils, steam, petroleum gas, etc. Manufacturing standards: GB, ANSI, JIS. Nominal pressures: PN2.5, PN4, PN6.4, PN16, PN32 MPa. Nominal diameter: DN5–DN25. Applicable media: various non-corrosive or corrosive fluids such as oil, water, and gases. Operating temperatures: -20°C to +440°C, -70°C to -240°C, ≤540°C, ≤570°C, etc. Manufacturing materials: 20#, 1Cr18Ni9Ti, 304, 316, 316L, 12Cr1Mov, etc
Needle valves are commonly used in applications with relatively high pressures
There are ones available for various pressure levels~~ The most common ones are field pressure gauges and the root needle valves of transmitters~~
Pin valves have high pressure and small diameters.