X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao12.cox.net ([68.230.241.27] verified) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTP id 889859 for flyrotary@lancaironline.net; Tue, 20 Dec 2005 11:50:18 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.27; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao12.cox.net (InterMail vM.6.01.05.02 201-2131-123-102-20050715) with ESMTP id <20051220164711.QTZC17437.fed1rmmtao12.cox.net@BigAl> for ; Tue, 20 Dec 2005 11:47:11 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Fuel filter selection Date: Tue, 20 Dec 2005 08:49:19 -0800 Message-ID: <001001c60585$52b41280$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C60542.4490D280" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C60542.4490D280 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Guys, I don't understand why you are installing filters AFTER the pumps? I sell large SEPAR diesel fuel filters and I always recommend all the filtering to be done before the pumps and out of the tanks. That's just fine for diesel fuel. It has low vapor pressure. Not true for mogas, especially if warm and at high altitude. Any water or debris if it's allowed to reach the pumps, will be beaten into smaller particles and may be PUSHED thru the filter, or even will damage the pumps. Yes; trap the water and debris upstream from the pump, fine filter downstream. If you have a boost pump always running upstream it is not as much an issue, but for those of use with gravity feed upstream, a fine filter upstream from the pump is not a good idea - it is asking for a vapor lock. Al ------=_NextPart_000_0011_01C60542.4490D280 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Guys, I don't understand why you are installing filters AFTER the =

pumps? I sell large SEPAR diesel fuel filters and I always recommend =

all the filtering to be done before the pumps and out of the = tanks.

<= /font>

That’s = just fine for diesel fuel. It has low vapor pressure. Not true for = mogas, especially if warm and at high altitude.

<= /font>

Any water or debris if it's allowed to reach the pumps, will be =

beaten into smaller particles and may be PUSHED thru the filter, or =

even will damage the pumps.

Yes; trap the = water and debris upstream from the pump, fine filter downstream. If you = have a boost pump always running upstream it is not as much an issue, but for = those of use with gravity feed upstream, a fine filter upstream from the pump is = not a good idea – it is asking for a vapor lock.

<= /font>

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