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The Industry Forum is Back!
We were off the air due to a break-in in our office. While all our computers and the entire network were stolen, we still suffered no data loss due to a comprehensive backup system. Nonetheless, it took us a significant while to restore all systems, and get back on the air, or, to be more precise, on the internet! In the meantime, we have collected more emails and now have over 22000 recipients world-wide! And, by the way, our belated wishes for a healthy and successful year 2003!
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Special: We have a brand-new Gusmer H20/35 in stock which is still available at 2002 prices. One unit only. Call 805-552-9128.
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#144-1 Robert K, California re #143-7 Rajan M
The Glas-Craft LS gun can be used for all kinds of ratios. I haven’t used it but that’s what my friend tells me. So you can also use it with a Graco.
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#144-2 Jim B re #143-8 Sid S, California
Sid- Your beating a dead horse. Formulators do not need to rethink materials. The material will spray well and look good but you are off ratio. 1:1 means 1:1 You should not have excess product left. Your product make look fine but the properties will not be correct. Your equipment may be a problem, but if you look at this and get a supplier that understands spraying and the equipment I know you will solve your problem. If you wish to contact me off line I will be happy to further explain this to you.
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#144-3 Jon S, Washington State re #143-2 Paul B, Indiana
GAP vs. Probler isn’t that easy to decide. Both guns are good. In my humble opinion, the Probler is easier to clean and overall less trouble but the GAP is a lot lighter as Gusmer always points out. It could be argued that the material inlet position (GAP: from below, Probler: from top) may be of significance. Lastly, the shut-off valves: you’ll need a tool for the GAP vs. the ability to shut them off by hand on the Probler. That’s a big plus for the Probler. Anyway, I’d say you got a choice here. But let’s talk about the GX-7. Why should I use that instead of an air purge gun??
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#144-4 Hugh M., Maryland in response to #143-8 Sid S, California on A vs. B usage:
The drums of A and B empty differently even though being sprayed in ratio because the A weighs more per gallon than the B does. 500 pounds of A means less gallons of A than 500 pounds of B, and your drums are filled by wieght not volume. The technical term for difference is specific gravity, the A being 1.23 and the B being from 1.o2 to 1.18 depending on blowing agent and manufcaturer. This results in 11 or 12 drums of A fror every 10 drums of B. The biggest difference is with water blown foams. Your supplier may be putting specific garvity numbers on your technical bulletins, and if they are there, the farther apart the numbers are, the more iso you will use versus B side.
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#144-5 Mark W, South Carolina in response to #143-8 Sid S, California
I had the same off ratio consumption problem since day one, over 5 years ago. Using the H2000 and Probler guns, I was consistently using 20 % less resin than Iso. The funny thing was, you could never detect any degradation in foam quality. They were getting suspicious at the plant when I ordered an extra barrel of Iso every 5 sets. Your friend is correct. The viscosity of the Iso is higher and simply flows better. For me, the answer was to simply run the Resin preheat at approx. 40* degrees higher than the Iso preheat or no Iso preheat at all during warmer months.
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#144-6 Vladimir P, Estonia
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(Translation, please!)
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#144-7 Jim K, Pennsylvania re #143-6 John S, Oregon
Please contact me off-line, I want to talk about testing with the open-celled foams because of the lack of the blowing agent. Currently we have to cover the foam in attics and crawl spaces in certain municipalities with an approved coating.
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#144-8 Mason Knowles, Spray Polyurethane Foam Alliance to #143-8 Sid S, California
SPF is sold by the pound not by volume. Typically, a kit of foam is 500 lbs of A and 500 lbs of B. The A side weighs slightly more than the B side, therefore, has less volume. if you spray on ratio, you will always
have some B side left over in a kit of foam.
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#144-9 Chad H, Wisconsin
I just wanted to thank you guys at CPI for explaining the Gusmer Powerlock hoses so completely on your website. I am lonely sprayer somewhere here in the middle of nowhere but I can learn so much from the forum and your website that you have helped me a lot professionally. This is even more amazing considering that I’m not even your customer, and yet your letting me have lots of good knowledge for free. That’s just plain cool. Keep it coming and thanks for it, too!
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#144-10 Rudy C, California
I don’t know about this powerlock stuff. Can I mix and match the old style hose with a new whip?
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This free service is made possible by CPI. Please visit their web site at www.cpillc.com or call toll-free 877-274-2600 or 805-552-9128.
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