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That is bizarre. I must have ~50 of these fittings on various whips, boosters, fill panels and I've had very little issues. If I do I just change the o-ring. My fill panel stays pressurized indefinitely with these fittings.
Parker or Swagelok are the standards. I use Swagelok which is what Bauer uses on their factory units but Parker tends to be cheaper so many others will use those. I would stick to those though as they are meant for high pressure gas
The oxyhacker standard for decades are these. Other MM, FF, and MF combinations available. 1/4" size in brass are good to 5000+psi and take a 111 Oring. The supplied Buna orings are fine for most applications but you do want to wash the whole thing.
McMaster-Carr
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McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
Don't boost o2 over 3K...
It's on the female side yes. The brass one's are good to 5,000 psi BUT if you run them that high the bearings which lock the female to the male nipple will create indentations in the male side and its a huge pain to connect/disconnect them.
They come with Buna Orings. Typically a viton 111 is a slightly tighter fit though due to changes in durometer. Both can leak down over hours or days though. In either case you need to remove the oring with a pick, wash the whole fitting and replace the Oring. New they almost always have tiny brass filings in them from the machining process and those are bad news in O2 systems.
