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That's a real bummer about S I's
response to your complaint. I would have expected them to at least
be concerned. Maybe it would be worth another try with the policy
of 'never stop with a no from someone who can't say yes'. :-)
All of my -10 fittings are angled; 1 90, 1 60 & a couple of
45's. I think I've only got 1 or 2 straight fittings in the -4
(fuel) stuff; the rest are also angled.
I'll be sure to post my results once I can get some pressure
applied.
Charlie
On 4/7/2014 5:41 PM, Steven W. Boese wrote:
Charlie,
The wire from the fitting in the photo was rounded and smooth
on the ends. The length was such that a little over 1/16" was
still in the insertion hole and not bent. All the fittings
were that way as were fittings from other vendors which did
not exhibit problems.
I did contact S. I. and their response was that the fittings
could be returned for credit if in "as new" condition which,
of course they are not.
Were the hose ends you used straight and not angled? If so,
the rotation of the fitting along with the nut may not have
been so noticeable. This would result in torque applied to
the hose which would tend to loosen the connection when placed
in service. Hopefully, my experience is unusual and your
connections are not at risk.
Steve
On 4/7/2014 1:11 AM, Steven W.
Boese wrote:
At the end of November last year, I responded to an
inquiry from Charlie concerning AN PTFE hose and
fittings from siliconeintakes.com. I stated that my
experience with their products and service was
positive but that I had not specifically tried their
hose and fittings.
I now have some experience with their AN10 PTFE hose
and fittings as shown in the attached photo. The
fitting is manufactured by placing the blue nut on the
red fitting and inserting the heavy wire through the
hole in the nut. The wire captures the nut and allows
it to rotate relative to the fitting. When the
tapered part of the fitting first contacts the male
end to which it is being connected, the fitting cocks
sideways in the nut as seen in the left side of the
photo. If the nut is tightened further, the fitting
rotates with the nut and thus maintaining proper
alignment of the angled fitting is nearly impossible.
If the fitting is restrained from rotating, the wire
inside the nut digs into the fitting and then comes
out of the back of the nut with the results as seen in
the right side of the photo. I have used fittings of
similar design from other vendors successfully.
Apparently the dimensions of the wire or the grooves
in the siliconeintakes nut and/or fitting are not
correct, or the aluminum alloy used is too soft,
or there may be some other defect. I tried installing
two 90 degree fittings and two 45 degree fittings and
all of them failed.
Steve Boese
RV6A, 1986 13B
NA, RD1A, EC2
Hi Steve,
Thanks for the update; that does not sound like good news. I
have made up all my hoses using their PTFE hose &
fittings, & haven't had any problems with them, though
they haven't seen any pressure yet. I did get one -10
fitting that had a scratch on the metal tube (they promptly
replaced it without charge), so this morning I pulled it
apart to see if I might have similar issues. The end of the
wire insert in mine is nicely rounded so it will follow the
groove when inserted, and I haven't seen any evidence of the
fittings tilting over when tightened.
Have you contacted S. I. ? I wonder if they might have
gotten a batch of fittings with bad wire inserts. Maybe the
wire was too long & wedged into itself when it was
inserted in the fittings you got.
Thanks again for the info, & please keep us updated.
Charlie
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