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Subject: Re: the quarter-turn myth
Date: Wed, 17 Jul 96 20:55:41 -0000
From: Jim Cobb <ir002538@po*.in*.co*>
To: "Tech Diver" <techdiver@terra.net>

>What the hell is SO DIFFICULT with making a SIMPLE 1/4 turn valve???
>Gee, railroads have been using them on air brake couplings for the
>last century! And they're intuitive (not to mention touch-feelable):
>in line with the pipe, it's OPEN, perpendicular to the pipe, it's
>CLOSED. Why bother with zillion-turn valves that have to be either
>OPENED or CLOSED???? 

This is called a ball valve. While common in LP air applications, it 
would be hideously expensive to produce for 3000-4000psi. Also keep in 
mind that a valve which is easy and convenient to open would also be easy 
to close, and you know what Murphy would do with that.

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