----- Original Message -----
Sent: Monday, December 19, 2005
20:03
Subject: Re: [PSUBS-MAILIST]
viewports
Yep! Plexiglas is a trade name for
Acrylic.
Some one wrote that you should get a copy of
PVHO. It's a good idea if you can get a look at it. In there,
you'll find the answers to most of your questions.
The one thing that PVHO didn't answer for me was
how to deal with thermal expansion of the acrylic lens. It's a great set
of standards to design with if your viewport is in a pressure chamber in a
building, but a sub viewport can be exposed to 130 degrees F in or better in
the hot sun and 30 degrees F in cold water. Mine has already seen that
extreme. If I followed the PVHO exactly, my external O-ring seal would
now be stuffed in the annulus between the lens and the viewport
housing after my deep water test in cold water.
Dan H.
----- Original Message -----
Sent: Monday, December 19, 2005 9:32
AM
Subject: Re: [PSUBS-MAILIST]
viewports
"Cast" Acrylic is what to use - correct
?
Brian
----- Original Message -----
Sent: Monday, December 19, 2005
04:51
Subject: Re: [PSUBS-MAILIST]
viewports
Joe,
Look up Acrylic in a search, find a
manufacture you like and either E-mail or call them with an inquiry about
where the nearest stocking distributor is in your location. That
works for most anything your looking for. Get a few distributors
names and you can bounce pricing between more then one if you like.
Isn't the internet a great thing?
;-)
Dan H.
----- Original Message -----
Sent: Monday, December 19, 2005
12:54 AM
Subject: [PSUBS-MAILIST]
viewports
Looking for a plastic supplier for
viewports, in the USA
Thanks
Happy holidays
Joe