Fuel Pressure and Hoses

[Gary Derian]

Gee, Mike, I didn't mean to get you riled up.  I was just commenting on barb
fittings.  The bottom line is check the specs and use hoses properly.

Gary Derian <gderian at oh.verio.com>


> 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>