Mailing List flyrotary@lancaironline.net Message #28636
From: Buly <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Fuel filter selection
Date: Tue, 20 Dec 2005 10:57:24 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

My solution, as recommended by others, is a PRM-81794 filter/water seperator before the pump.

Your solution? :) I had it installed a year ago and I like it. Vapor lock is caused by a faulty fuel system design. My filter is at the lowest point and gravity fed from both tanks. Fuel pumps are also below the fuel tanks. People go nuts with check valves, filter on top of filter on top of screen, electric solenoid valves  sump tanks etc, than wander why the pumps are struggling and vapor locking. Keep it simple.
Buly
This is a high flow unit with dual 1/2" inlets and outlets that filters down to a few microns.  Then a Summit Racing 40-micron inline filter after the pump. The first should insure that everything is clean and dry.  The second will catch most debris that a failing pump or pressure regulator might throw.

The PRM-81794 has a valve on the bottom of the filter.  I presume that is to drain any collected water.  Has anyone investigated semi-permanently attaching a hose leading to an easily accessible drain?

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Buly
atlasyts@bellsouth.net



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