Adding a sinter filter to a pillar valve dip tube

[Scared Silly]

Just get a transfill whip, that way you can empty a cylinder, inspect it, and then put some more air back in it from another. Problem solved.

 

[Akimbo]

…RE blown burst discs – not in use in SA luckily…

I appreciate both sides of the Scuba cylinders burst disk argument. Imagine a valve that blocked flow to the burst disk when the valve was fully open. I believe that this would satisfy both sides of the debate for Scuba, but maybe not SCBA cylinders for firefighters. I can envision that the manufacturing cost increase could be very slight with cleaver design.

…RE blown valve o-rings – the LDS techie assured me that Faber M25 necks with the recess is the least prone to give problems…

Interesting. Is the O-ring seat design different on Faber or between M25 and ¾"-14 NPSM?

…Just one question – will the annual visual inspection be frequent enough to detect a corroded sinter filter or is this trail and error..

That depends entirely on how clean and dry your fills are. Use history as your guide as long as you continue to use the same air source and they remain consistent. Once a year will be fine if your past VIPs haven’t shown any contaminants or corrosion. However, if that is true you probably don’t need the dip tube filter.

In the end, our greatest leap of faith we all must have is in the quality of breathing gas and the cylinder won’t explode.

BTW, don’t use a sintered filter with integrated threads rather than machined brass threads. I used them in the past for silencers and noticed that they shed particles that would end up in your regulator filter.

 

[drcolyn]

Thanks for that out of the box tip knowone.
If I recall correctly from my SAUU compressor operators course manual the reason for the 20 bar limit was because: "below 20 bar any water in the tank will not be sucked out of the dip tube".
Assuming, I didn't by accident dive till I had 20 bar left, there should be no water and a little decanting should be OK.

 

[captain]

Thanks for that out of the box tip knowone.
If I recall correctly from my SAUU compressor operators course manual the reason for the 20 bar limit was because: "below 20 bar any water in the tank will not be sucked out of the dip tube".
Assuming, I didn't by accident dive till I had 20 bar left, there should be no water and a little decanting should be OK.

"below 20 bar any water in the tank will not be sucked out of the dip tube".

I have no idea what this refers to, please explain.

 

[knowone]

Imbibe drcolyn within your tank a cup of
tea, and then claim deplometic immunitee


or just become a diver


or just don't carry elephants in your tanks

 

[captain]

Imbibe drcolyn within your tank a cup of
tea, and then claim deplometic immunitee


or just become a diver


or just don't carry elephants in your tanks

Profound advise!