Fuel Pressure and Hoses

[Mike Rolica]

Actually you are wrong on that one.  The compression unions I used are
Parker Part num 6 hbi2
Rated at 1500psi, at 400d Cel.!  I also used Parker JIC fittings as they are
the same as AN but steel or ss.
Maybe you should pickup a Parker 4300 series catalog some time and read it.

Also the Teflon lines are no good for gasoline as it and diesel eats them.
I have the specs right in front of me as we use this for die heater oil
lines on all or machines. And it says not for use with solvents or alkalis

Oh and you should actually read the engineering data and fine print closely
in these catalogs as it notes with ** Push-Lok hose barbs are designed for
use with Parker push-lok hose and do not require clamps.
Also they are only good for -10 to 165 d F at 150 psi is equipped with a
push lock.  You were reading what the actual coupling is rated for.  For the
push lock hose, the price per foot for petroleum service, fire resistant
350psi high tem (302d F max) is about 3 times the price of ss braided.  I
know because we carry it in our stock room for use of die water lines
series 836 or 821fr (good only to 221d C)
Mike Rolica
Meridian Magnesium Products
Strathroy, Ont 
Ext. 260


	-----Original Message-----
	From:	Gary Derian [SMTP:gderian at oh.verio.com]
	Sent:	Tuesday, November 23, 1999 11:27 AM
	To:	gmecm at efi332.eng.ohio-state.edu
	Subject:	Re: Fuel Pressure and Hoses

	A hose barb fitting is fine if used correctly.  The clamp is never
supposed
	to go over the barb.  In fact the good barbed fittings
(Parker-Hannifin
	Push-Lok(R)) use no clamps at all.  They are rated for 250 psi with
the
	correct hose.  Now if your oil is 300 degrees, you need the ss
braid/teflon
	tube stuff.

	I find the anodized Earls fittings and hose way too expensive.  I
use
	industrial grade parts from the local hydraulic house.  Steel
fittings are
	OK for me.

	Brass compression fittings are not good for high pressure either.
Use
	special flare or flareless fittings to connect to steel tubing.
Best is to
	braze the proper AN fitting to the tube.  Make sure all metal pipes
are
	supported to prevent vibration.

	Gary Derian <gderian at oh.verio.com>



	> I used the original gm fuel injection hose. Goes from steel flare
with o
	> ring on tpi to body fuel line. Regular brass flare (-6) fittings
work
	good.
	> Then I used brass compression unions to go to the steel line.  I
would not
	> use hose barbs at all. Treat it like you would a brake system.
(i.e. all
	> threaded /flare fittings).
	> Mike Rolica
	> Meridian Magnesium Products
	> Strathroy, Ont
	> Ext. 260
	>
	>
	> -----Original Message-----
	> From: Bob Valentine [SMTP:bob at tecmark.com]
	> Sent: Monday, November 22, 1999 10:58 PM
	> To: gmecm at efi332.eng.ohio-state.edu
	> Subject: Fuel Pressure and Hoses
	>
	> I just picked up a set of 36lb injectors for my Olds 403 project
	> since I
	> got them at a really good deal.... the thing is, I think they may
be
	> a bit
	> large for my app.  The stock regulator I'm using is set at 39lbs -
	> how low
	> could I drop it before I run into problems?
	>
	> Also, what's everyone using for connections of high-pressure hose
to
	> steel
	> line?  Is a standard brass barbed fitting ok?
	>
	>
	> --> Bob Valentine
	> --> bob at tecmark.com