Re: [PSUBS-MAILIST] Controle Valves

["Dale Heinzig" <heinzind@telusplanet.net>]

----- Original Message -----
From: Dan H. <machine@epix.net>
To: PSUBS <personal_submersibles@psubs.org>
Sent: Friday, December 28, 2001 4:42 PM
Subject: [PSUBS-MAILIST] Controle Valves


> I'm doing some of the plumbing in the K-350 I'm building.
>
> According to the plumbing print, the Captain has designed in "Henry 6253
> diaphragm valves" for controlling the air to the ballast tanks.  These
> are backed up with secondary ball valves for safety. I'm not familiar
> with these "Henry" valves.  I looked throughout Mc Master Carr, and they
> have hundreds of valves, but don't list any diaphragm valves.
>
> Does anyone know what these valves are like, where I can locate them,
> and if they're really needed.  I think I can just use a quarter turn
> ball valve for the main ballast tanks, but I'm thinking a quarter turn
> valve may be to rough to control the variable ballast tank air.
>
> I don't have any sub experience and would appreciate some input from
> anyone who does or anyone else building one.
>
> Thanks, Dan H.
>
>
>

Hi Dan..

I have 3 henry valves, the ones specified for the K250..  ( I am not where I
can check to see if they are the same ones specified , but will check, and
get back to you).. I found that they were nothing special.. I used Brass
"toggle valves" instead....  These seem to work very well.. I can either
push them open for a temporary fill, or just flip them open, for constant
air.. this works good.. for the variable ballast, I find that the ball
valves work ok for me, because you just open the vent valve, and the inlet
valve, then when you are neutrally boyant, just close them.. quick and
simple.. as for blowing them, I found that pressuring up the tank, then open
the main valve, and it will blow the variable ballast.. no need for fine air
adjustment at all.. ... If you want to use the Henry valves, and these are
the ones you need, I can send them to you... Ill let you know what ones they
are...



dale.