[Healeys] Dual fuel pumps

[warthodson at aol.com]

I plumbed two SU's in parallel with separate toggle switches. SU's have check
valves in them so fuel cannot flow thru the non-operating pump in reverse.
There is no need for electric isolation valves. As an aside, I really wanted a
four position rotorary switch (Main, Auxiliary. Both, Off), kind of like an
aircraft magneto switch (right/left/both/off), but could never find an
appropriate one & could never figure out how a Mag Sw. could be used. They
have very strange wiring characteristics.
Gary






-----Original Message-----
From: Oudesluys <coudesluijs at chello.nl>
To: keith taylor <ktee20 at gmail.com>
Cc: healeys <healeys at autox.team.net>
Sent: Sat, Apr 16, 2011 2:28 am
Subject: Re: [Healeys] Dual fuel pumps


Keith,
 do understand why you want to put them in series but if you
ccidentally switch them on both you have double the fuel pressure.
etter fit them parallel with an electrically operated valve (4) before
nd after each switch. The valves are operated by the same feed wire as
he corresponding pump. These valves are easily sourced from LPG fitters.
his way there is no circulation through the faulty pump and you will
ave no leakage if something horrible has happened to a pump.
ees Oudesluijs
[demime 1.01d removed an attachment of type text/x-vcard which had a name of
oudesluijs.vcf]
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