Is there such thing as a 30 deg pipe fitting?

AX-O · #1 09-23-2009, 08:33 PM

I am trying to get my purge valve to fit under the cowl/plenum and just cant do it with the configuration shown below. Are there any fittings less than 45 degrees that will fit between the spider and the purge valve?

Mel · #2 09-23-2009, 09:37 PM

I've seen straight, 45 and 90 degree, but never anything in between.
I even checked my new "Genuine Aircraft Hardware Co" catalog.

D-Dubya · #3 09-23-2009, 09:54 PM

I looked in the Aeroquip catalog and they have the same that Mel referenced. No dice. Looks like you may have to get creative.

roee · #4 09-23-2009, 10:01 PM

You can get any angle you want if you can tolerate a lateral offset. Use two 90 degree elbows, one with a male NPT port and the other with a female NPT port. Mate them together and stop the final turn at whatever angle you want.

frankh · #5 09-23-2009, 10:15 PM

On the sj plenum you have tocut a hole and make a bulge. There is plenty of room for the purge valve this way

Frank

AX-O · #6 09-23-2009, 11:34 PM

Quote:

Originally Posted by frankh

On the sj plenum you have tocut a hole and make a bulge. There is plenty of room for the purge valve this way

Frank

I did that however, my engine is a narrow deck so the spacers that came with the fuel injection kit don't work. I had to make longer spacers, that moved the purge valve further outboard. My cowling sits right on top of the valve. I refuse to put a blister patch on my cowling. So I have to find another way.

Don Jones · #7 09-24-2009, 08:35 AM

....Putting a braided teflon hose on it and remote mounting it where ever
you want?

frankh · #8 09-24-2009, 08:43 AM

the further the valve gest from the spider the less well it will work.

Any chance you could remake the the bracket where it bolts to the engine such that it angles the the whole thing downwards?

Come to theink of it I think I make have even chamfered the alu tubes such that it angled the whole thing downwards myself. You don't need much angle as the assembly is quite long.

Frank

frankh · #9 09-24-2009, 01:47 PM

And Don at Airflow will probably get mad at me for this one but oh well..

So if you really want a 30 degree fitting..Simply remove the fitting thats there..Go down to your local hydraulic hose emporium and buy the same thing in steel (as opposed to stainless steel) cut the thing in half at the middle and grind a 10 to 15 degree angle on each cut face.

Then simply weld the two halves back together.

I have done this several times when I made fittings for my wingroot fuel pump system.

Somebody who is good with a TIG could probably do the same thing in SS, but I gas weld and carbon steel is what I'm comfortable with.

Of course you will have to adjust (or make new) the connecting bracket.

Perfectly feasible..if your not in a hurry you could cut it, send it to me and I'll weld it back up for you.

Frank

AX-O · #10 09-24-2009, 03:20 PM

Talked with Don. He said I can remotely mount it on the other side of the engine (great idea). He said an 8 inch line or so would not make that much of a difference. By the way if you mount the purge valve remotely, you don't have to use stainless steel fittings. Alum AN fittings work fine. Don't ask me why. Thanks to all for the ideas.