Quote:
Originally Posted by MrBasse
I worked for Parker Hannifin for several years designing products in their brass fittings division and we utilized a large group of their PTC fitting line in our product. I'd have to dig to find it if I still can, but the rating used to be on the product catalog main page. When you insert the tubing, the proper method is to insert fully and they'll tug to seat the barbs. This deform the barbs a little bit. After being done a few times the barbs no long hold a perfect shape. The metal that makes up the barb itself is only a few thousands thick and won't hold shape for long when being deformed back and forth. I'll see if I can find the spec and get back to you.
The orings just get torn up if your tubing isn't cut properly...
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I just got off the phone with a Parker Applications Engineer. Consider my mind officially blown. Parker is completely unwilling to stand behind the reliability of connections made with their PTC fittings. They say the fittings are tested to an ISO spec of FIVE make and break connections and are not willing to publish reliability data beyond that test. I work at NASA Langley Research Center as a contractor, and reliability of pneumatic connections is a BIG deal. I now need to make some calls to our pressure systems safety office. This has the potential to turn into a big hairy deal.