CYLINDER VALVE HOW TIGHT

[oceanobsession]

Hi all how tight should you tighten the valve into the cylinder is it a 100 nm

thanks phil

[Beeblebum]

A couple of wacks with a mallet is about right... (But tapered threaded valves must be torqued)

[Hobbsy]

Originally Posted by Beeblebum

A couple of wacks with a mallet is about right... (But tapered threaded valves must be torqued)

Despite your obsession with special tool part no. FBH 1, this is actually about right!

[Beeblebum]

Au contrare, it is not moi who has a predeliction with a tool, n'est pas M. Le Peevalve...?

[Scubee]

Originally Posted by Beeblebum

A couple of wacks with a mallet is about right... (But tapered threaded valves must be torqued)

Would that be two 'Big Heavty Strong Person' whacks, or two girlie whacks?

[londonsean69]

Originally Posted by Scubee

Would that be two 'Big Heavty Strong Person' whacks, or two girlie whacks?

2 girly whacks should do it, it is the o-ring that makes the seal, so just enough to compress the o-ring a bit.

Use the APD (Adjustable Percussive Device)

[stillbubbling]

Originally Posted by londonsean69

Use the APD (Adjustable Percussive Device)

I always thought it was a VPA - Variable Pressure Applicator....

[jez1954]

We call ours "the persuader" - after a couple of whacks the obdurate item is usually persuaded to do what we wanted in the first place (His nickname is Roger)

[scubacoach]

If you go to the library you can access any standard for UK and Europe. There is a standard which gives the correct torque for all cylinder threads used with gases. If you look up EN144 part 1 I believe the standard you need is within the list of other standards referred too. Also using a crows foot spanner on the valve will not give you a correct torque. Even using girly taps etc. Also beware putting EN144 valves onto DIN 477 cylinders or vice versa as you may get o-ring extrusion under pressure.

[milldog]

before you ask



Graham