thanks David!

You've always got such good information!

Bill

----- Original Message -----
From: "David Beierl" <dbeierl@attglobal.net>
To: "Bill Davidson" <wdavidson@THEGRID.NET>
Cc: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, January 20, 2001 9:02 PM
Subject: Re: fuel pressure gauge

> At 09:58 PM 1/20/2001, Bill Davidson wrote:
> >Pressure is pressure... right.... BUT the innards of one gauge may be
built
> >for one fluid and yet seals may dissolve with a fluid they are not
designed
> >for.... dunno but something to think about.... especially when you're
>
> Mechanical pressure gauges use a Bourdon tube mechanism -- a flattened
> coiled tube that starts to uncoil proportionally to applied pressure.
>
> All the ones I've ever looked inside have had soldered brass or bronze
> movements (though brass certainly wouldn't work for ammonia).   If you
have
> a gauge lying about you can open it up and see -- but I doubt there's
> anything but metal once you get into the actual gauge.  I'd be more
> concerned about hoses leading to it.
>
> david
>
>
> David Beierl - Providence, RI
>   http://pws.prserv.net/synergy/Vanagon/
> '84 Westy "Dutiful Passage"
> '85 GL "Poor Relation"
>
>