Valve Stem Threads
Valve Stem Threads
(OP)
Hi,
It is observed that Valve Stem / Bonnet thread profiles are either ACME or Trapezoidal in most of the designs. I was wondering why other thread profiles like Metric, UN are not used for this application. Any reasons?
Thanks in advance.
It is observed that Valve Stem / Bonnet thread profiles are either ACME or Trapezoidal in most of the designs. I was wondering why other thread profiles like Metric, UN are not used for this application. Any reasons?
Thanks in advance.





RE: Valve Stem Threads
....depending on where the valves or stems are produced, type of valve, and to what norm and market.
For European produced valves to EN standards you will find other standards commonly used also for stems.
RE: Valve Stem Threads
From memory, ACME was the first power thread standard which many countries simply adopted after WWII.
RE: Valve Stem Threads