Quote:
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Originally Posted by Hotseat
The thread area is NOT anodized, we place grease on them to protect them from the acid.
If we did not, the threads would not be sharp, as the acid causes them to round off or build, and this will cause problems with sealing plastic fittings.
The order was place with plastic fittings, and we opitimized for the fittings we provided.
Yes, there is a taper, if there was not, the fitting would not get tite.
You guys should know, NPT standard is NOT followed very well. Try placing 4 different brand / material 1/4 NPT fittings side by side, and you will see the starting diameter varies.
At first we designed for metal fittings, but people where forcing plastic fittings all the way into the impeller (no joke). The feedback we had, showed 90% of the people where using plastic fittings, so we cut back a bit, to have best fit with plastic.
If you have a metal fitting, do as suggested above, and run it in and out a bit.
Most of the confusion comes from our European customers, which will no longer be a problem, as we now ship to Europe with 1/4 G straight ports 
** AGIACOBBI, you worked on injection molds with NPT threads, could use some advise on three peice mold with interior NPT threads. Having a bitch finding an example  |
Tos
the thread 'issue' started before your post, and I use quotes as appropriate
go back and read Dan's responses
he has chosen to make non-standard threads,
its his problem
but when he starts to say that NPT can be anything, then I - speaking for Swiftech - will correct him
(because this is a technically oriented forum)
-> I do suggest to you that an investigation into materials compatability would be productive.
The info has been posted here and on OCAU; Dan has made a BAD recommendation that is going to result in failures down the road.
But, as with the threads, these are Dan's choices for C-Systems and their customers.
It is an interesting ethical/commercial dilemma:
If I (Bill Adams) see something incorrect should I say so ?
If I (VP Engn at Swiftech) see something incorrect should I say so ?
And what is my 'responsibility' to my many friends here ?
I do not have a clear answer in my head as to the 'best' resolution of these conflicts.