I have used Bimba Air cylinders to pressure
balance certain parts of our inspection tools. They run in a natural
gas environment up to 2500 psi pressure. They worked quite well.
Jay. (B)
"Jay K. Jeffries"
<bottomgun@mindspring.com> Sent by: owner-personal_submersibles@psubs.org
Vance & Brent,
Have a look at Bimba cylinders
(they make them in S.S.). John Holt at Harbor Branch use to swear
by them.
R/Jay
Respectfully,
Jay K. Jeffries
Andros Is., Bahamas
As scarce as the truth is, the supply
has always been in excess of the demand. -Josh
Billings
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of vbra676539@aol.com
Sent: Saturday, January 10, 2009 6:37 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Mushroom Vent CAD Assembly Options
The three way just vents it through
a bronze muffler fitting into the main cabin. Even at 2250 psi, the volume
is miniscule. I'll get back to you on the pistons.
Vance
-----Original Message-----
From: Brent Hartwig <brenthartwig@hotmail.com>
To: PSUBSorg <personal_submersibles@psubs.org>
Sent: Sat, 10 Jan 2009 2:46 pm
Subject: RE: [PSUBS-MAILIST] Mushroom Vent CAD Assembly Options
Thanks Vance,
What brand and model of single line pneumatic actuator were you looking
at using? As it turns out my current assembly only needs 1 to 1.5
inches movement in the acturator. For a single line unit, when the air
pressure is released from the actuator, where does that air go? I'm
guessing it goes into the cabin unless it's plumbing outside or into a
empty tank.
It's mostly made up of 1/4" X 1" 316 SS bar stock, and 1"
thick black UHMW. So the goal is for it to be easy and affordable to make
and assemble. I made a mock up of the single line, spring loaded pneumatic
cylinder Vance was talking about, which I would like to use in this assembly.
I will need to trim away some material on the plunger land, and the
piece cut out when I made the whole in the FRP MBT, that meets the bottom
of the FRP MBT, and then attach them with Seka flex and SS screws. This
way I can have a clean look on the top area of the MBT's, and the angle
I have to mount the vent on aids in letting almost all the air out. The
very small air pockets left I'm thinking will not be an issue. I thought
mounting the vent this way would be better for my application, since the
knuckle curvature of the heads and the high point of the MBT's are in the
same area.
I'm interested in your guys thoughts on this concept design. I've uploaded
three screen capture clips of the assembly animated on Youtube. The
quality is not that great on Youtube, so if anyone would like better quality
versions of these clips, let me know off list and I'll send them to you.