Needle valve adapter
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I would like to ask everyone: for the root valve of the pressure gauge, the valve fitting specified is J23W DN15 with a diameter of 22; the connection fitting for the pressure gauge is M20X1.5/14. How can the pipes with diameters 14 and 22 be welded together? Thank you!
Below the pressure gauge should be a condensation ring, and below that is the root valve; nowadays, root valves generally come with 1/2 inch internal threads, allowing them to be screwed on directly
This post was last edited by “Hasty Passerby” on July 1, 2018, at 17:55. The inner diameter of the valve fitting with an outer diameter of 22 mm is approximately 16 mm. A seamless tube measuring 14*2 should be added between the pressure gauge fitting and the pipe. The seamless tube should be butt-welded to the pressure gauge fitting, and socket-welded to the valve fitting.
This post was last edited by hby1224 on 2018-7-1 at 13:17. There should be a condensation ring below the pressure gauge, and below that is the root valve. Nowadays, root valves generally come with 1/2 inch internal threads, allowing them to be screwed on directly.... The problem now is that one side has the valve’s 22mm thread, while the other side has the 14mm thread of the instrument connection fitting; there is no condensation ring on the straight pipe section – how can they be connected?
A reducer is machined on a lathe.
There are reducer fittings available with a 22-to-14 connection; if the design institute provides the specifications, this will be listed there.
Weld it directly; ask the welder – he has done this many times before
If it can’t be connected, use an eccentric joint as a workaround.