Question Check valve for booster

[marc.collin]

hi

where are you get you o2 clean check valve?

or have you just took a check valve who use viton oring... put simple green and water inside?

thank

 

[rjack321]

Just buy them new from a proper reputable supplier with viton rings. If you really want, for tiny hard to work with parts like this, you can use a one-step degreasing process like an 90% + isopropyl alcohol wash followed by forcing clean air through them to dry. But that isn't really necessary, there is no grease in them when manufactured, just the Oring.

 

[Agro]

Are you 100% sure there is no grease in there? And no other contamination, such as grease from hands for ex? I would not bet my life on it.

Until now I found no check valve out of the box beeing 100% gas-tight, they all were leaking a little bit. Sometings right from the beginning, sometimes after a few month.

I produced check valves, using Poseidon parts: Zytel seat, rubis ball, spring. They are 100% gas-tight and last for ever.

If you use the check valve out of the box I would disassamble it completely and clean it very well. Simply washing out by green or isopropyl is not enough for my demand. But it's your decission.

 

[iain/hsm]

hi

where are you get you o2 clean check valve?
or have you just took a check valve who use viton oring... put simple green and water inside?
thank

Most companies compressing oxygen start by not using a stainless steel body with a stainless seat and without using a steel piano wire spring.

Now if your going above the 150-170 bar limits for gaseous oxygen the NRS1 data sheet below allows a Cv factor of 0.6 with a maximum working pressure of 414 bar (6000psi) and certified for Oxygen Use.
Certified Cleaned for Oxygen Service (and not oxygen cleaned) as there is a big difference between the two statements. British made the threads are BSPP 1/4G No PTFE tape. The oxygen version is Brass Bronze or Monel depending on pressure with the Phosphor Bronze spine