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Re: Pumps
By:Roy
Date: 12/26/2008, 4:51 pm
In Response To: Re: Pumps *LINK* (Sam McFadden)

: Roy,

: In some cases, lower vacuum can give all the flattening and air removal
: needed while preventing excess resin loss. In that case it applies before
: the resin gels. Of course, if you need to prevent crushing the core or
: tooling, that might pose a problem for infusion. Test samples will help
: you figure it out.

: The only other advice I'd give about pumps is to use an oil-less rotary vane
: or diaphragm pump. Pumps designed to go into the low vacuum range use oil
: to seal the vanes, and that oil will come out the exhaust in a fine mist.
: My first pump was a cast-off (free) Welch roughing pump from a high vacuum
: system. Working away at 25 in-hg, the exhaust looked like thin smoke. As
: for the vacuum capacity, pick up a couple of cheap gages from
: McMaster-Carr, put one on the pump and see how much vacuum it'll pull.

SNIP

Thanks Sam

I think I'll scrap the Sargent-Welch pump and build my investment around a more worthy oil less pump.....seems to be the most important part of the matrix.

Best Wishes
Roy

Messages In This Thread

Other: Seaming a composite Sit on Top...
Andy -- 12/20/2008, 10:55 pm
Back to the seam issue
Paul G. Jacobson -- 12/26/2008, 5:31 pm
Re: Back to the seam issue
Bill Hamm -- 12/27/2008, 11:25 am
Re: Other: Seaming a composite Sit on Top...
Charlie -- 12/22/2008, 1:33 pm
Re: Other: Seaming a composite Sit on Top...
Sam McFadden -- 12/22/2008, 2:36 pm
Re: Other: Seaming a composite Sit on Top...
Charlie -- 12/22/2008, 5:08 pm
Re: Other: Seaming a composite Sit on Top... *LINK*
Sam McFadden -- 12/22/2008, 5:23 pm
Re: Other: Seaming a composite Sit on Top... *LINK*
Daniel Daniels -- 12/28/2008, 4:58 pm
Re: Other: Don't Point that Thing at Me!
Charlie -- 12/28/2008, 8:35 pm
Re: Other: Don't Point that Thing at Me!
daniel daniels -- 12/29/2008, 3:46 am
Re: Other: Seaming a composite Sit on Top...
Roy -- 12/25/2008, 10:34 am
Pumps
Sam McFadden -- 12/25/2008, 1:29 pm
Re: Pumps
Roy -- 12/25/2008, 1:55 pm
Re: Pumps *LINK*
Sam McFadden -- 12/25/2008, 10:28 pm
Re: Pumps
Roy -- 12/26/2008, 4:51 pm
I'm Amazed...
Ken Brunton -- 12/23/2008, 12:45 pm
Re: Other: Seaming a composite Sit on Top...
Bill Hamm -- 12/23/2008, 12:56 am
Re: Other: Seaming a composite Sit on Top...
Sam McFadden -- 12/23/2008, 10:15 am
Re: Other: Seaming a composite Sit on Top...
Bill Hamm -- 12/24/2008, 1:28 am
Infusion vs. wet lay-up
Sam McFadden -- 12/24/2008, 10:55 am
Re: Infusion vs. wet lay-up
Bill Hamm -- 12/25/2008, 1:06 am
Re: Infusion vs. wet lay-up
Sam McFadden -- 12/25/2008, 1:52 pm
Re: Infusion vs. wet lay-up
Bill Hamm -- 12/25/2008, 8:44 pm
Re: Infusion vs. wet lay-up
Sam McFadden -- 12/25/2008, 10:33 pm
Re: Other: Seaming a composite Sit on Top...
Charlie -- 12/22/2008, 10:44 pm
I'm a fan
Ted Henry -- 12/23/2008, 11:18 am
Thanks *NM*
Sam McFadden -- 12/24/2008, 11:45 am
Whoa! Charlie, Not so fast
Reg Lake -- 12/23/2008, 1:30 am
Re: Whoa! Charlie, Not so fast
Sam McFadden -- 12/23/2008, 10:35 am
Re: Whoa! Charlie, Not so fast
Charlie -- 12/23/2008, 8:28 am
Good intentions.
Reg Lake -- 12/23/2008, 5:16 pm
Re: Other: Seaming a composite Sit on Top... *LINK*
Sam McFadden -- 12/21/2008, 2:35 pm
Re: Other: Seaming a composite Sit on Top... *Pic*
Reg Lake -- 12/21/2008, 2:06 am
Re: Other: Seaming a composite Sit on Top...
Bill Hamm -- 12/21/2008, 1:30 am