Safety warning!!! Bad regulator EBAY

[oldpro]

Actually, the adjusting knob has conventional RH threads (lefty loosey)…. and if you watch the video, unscrewing it increases the pressure.... At some point, the travel of the Bellevilles should become the limiting factor to the maximum adjustment pressure.... Unless I am mistaken, unscrewing it further, once the Bellevilles are compressed flat by the air pressure (2200 psi?)…. or no longer have preload on them (depending on their location, I suspect they put preload on the end of the piston) would not increase the pressure further.... I am somewhat alarmed that the knob might be unscrewed while under pressure to the point of it being launched by the HPA inside the regulator.... That, by itself, is an unsafe design, IMO.... Perhaps the piston might come out of the larger bore (which must be inside the adjusting knob), which would cause venting past the large O-ring…. presumably through the threads or a vent hole?....

Certainly there seems to be some safety questions beyond the thread quality, from what I can see....

Bob

 Your correct at some point the poppet will have no effect and expose the pressure in the bottle to full output and additional turning will result in a big brass slug being launched at what ever its pointed at.

[rsterne]

As long as the regulator seat does not leak, I would think the output pressure should stay at 2200 psi.... as long as the larger cylinder (ie the adjustment knob) stays sealed to the piston.... However, that still leaves that 2200 psi pushing outwards against the adjustment knob.... and if the threads disengage before the large O-ring comes out of the large cylinder, and the pressure vents somewhere.... the knob may indeed become a projectile, accelerated by that 2200 psi.... Without seeing the piston and bellevilles out of the knob.... and knowing if venting could occur.... there is no way to say for sure, of course....

Bob

[oldpro]

As long as the regulator seat does not leak, I would think the output pressure should stay at 2200 psi.... as long as the larger cylinder (ie the adjustment knob) stays sealed to the piston.... However, that still leaves that 2200 psi pushing outwards against the adjustment knob.... and if the threads disengage before the large O-ring comes out of the large cylinder, and the pressure vents somewhere.... the knob may indeed become a projectile, accelerated by that 2200 psi.... Without seeing the piston and bellevilles out of the knob.... and knowing if venting could occur.... there is no way to say for sure, of course....

Bob

Actually the piston is attached to the knob so you can turn it out and off the seat to expose full tank pressure to the adjuster. Just unsafe in many aspects.

[rsterne]

the piston is attached to the knob

If that is the case, how can the piston move to regulate the airflow?.... I don't understand.... 

Bob

[oldpro]

the piston is attached to the knob

If that is the case, how can the piston move to regulate the airflow?.... I don't understand.... 

Bob

look at the video when he pulls the knob out its all trapped inside the knob. Kind of hard to explain unless i do another video of the adjuster disassembly.

[rsterne]

I looked at the video.... I would assume that inside the knob is a Belleville stack to provide the preload.... and then a piston, sealed with an O-ring.... with the large cylinder being machined inside the knob.... The piston must move inside the knob, no?....

You are correct, without seeing it disassembled I have no sure way of knowing how it works.... A simple photo or two of it disassembled would suffice.... Otherwise I should just shut up, as my comments are pure speculation….

Bob

[Geoff]

JB WELD it to test, then toss it ?

[cootertwo]

If anyone is thinking about using one of these ebay regs, you should first look over some old "A Team" shows, where Mr "T" knocks off the valves of some oxygen bottles, to launch them as missiles through the wall. 3 cwappy threads on a 3000psi bottle, not me! safety glasses! Ha!