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Regulator for gas cylinder

2020-10-27View Original

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What do the letters in the pressure regulator for gas cylinders, W21.8-14RH(F), stand for? What letter represents an external thread?
Reply #22020-11-08
40-liter methane cylinders such as QF-30, QF-30A, etc., have threads of type W21.8-14LH (F); the outer diameter of W21.8 is Ø21.8 mm, with 14 teeth per inch. The number 14 indicates a pitch of 1.8142 mm, while LH roughly denotes the direction of the thread.

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Translated at 2026-07-21 02:21:16

Original: https://bbs.hcbbs.com/thread-3111198-1-1.html

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