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Posted: Oct 26, 2008 03:50 PM	maximum yield 1.9 using 1.9 cc with some 1.9 pp (polar pro) we pressurize opened drums between jobs. 2-3lbs hose heat at 125. iso pre-heater at 125. resin pre-heater at 130. (hotter for thicker resin) we always keep material stored at 65-70. keeping detailed log of yields. getting 1750-1790 clicks out of 25-30 pro currently. 50-60 degree weather. on a 94 degree day we got 1938 out of a set that was the best yield ever. of course, as it gets cooler outside, yield is dropping. any suggestions for getting more yield? (now or in summer) i am sure somebody has some angles that i dont know about. thanks.
SprayFoamSupply.com Posted: Oct 26, 2008 09:59 PM	You seem to be talking about yield being the number of clicks your machines gets rather than the number of board feet you get out of a set? You will get more clicks per set the warmer the drums are. Fluids expand and contract with temp. When the drums are warm, you actually have more material in the drums by volume. That is why the materials are sold by weight. George
Gerry Wagoner Posted: Oct 30, 2008 05:16 PM	Yes.
Posted: Nov 07, 2008 07:24 AM	strokes is only a good way to look at volume used...1750 x.063= 110.25 gallons (now if you assume 10 lbs per gallon,,,then 110.25 x10 will give you your weight,,and if you buy by the pound,,,wamma jamma,,,theres the cost of your fluid!!!but not yield...) yeild is how far the fluids went on the wall,,, most typically expressed in a square foot or board foot coverage... what georgeousgeorge said... 'dude
Posted: Nov 07, 2008 09:18 AM	the more clicks on the proportioner, the the more board feet board feet we get. board feet are more approximate versus exact clicks on the machine. when we got 1938 clicks, we got about 4800 board feet. (VERY HOT DAY) that will be hard to duplicate in the coming weather. looking for tips on more clicks (or board feet) did have a sprayer in florida e-mail me direct and he said he used band heaters & heated the resin to 80 degrees and also mixed the resin. says it works but gotta watch what you are doing. just used 8.3 sets of polar pro last week on a 5,000 sq ft lake house in Pickney. got an average of 1642 clicks per set. but sure would like to get more out of a set.
SprayFoamSupply.com Posted: Nov 07, 2008 08:45 PM	The more clicks on the proportioner, the more volume of material flowed through your machine. It has nothing to do with yield. What kind of machine are you spraying with? Do 1900 clicks of 2lb foam yield the same as 1900 clicks of 3lb foam, or open cell foam? No. If you got 1938 clicks on a hot day, then you got 4,800 board feet because it was a hot day. You got more clicks that day because the material in the drum was warm and has more volume to it than it would on a cold day. It comes down to the specific gravity of the material. That is the weight of 1ml of material at a specific temperature. For example 1ml of ISO weighs 1.33 grams @ 68 degrees or 11.099lbs per gallon. If you are getting 550lbs of ISO, then you have about 49.55 gallons of ISO when the drum is 68 degrees. Now, if you warm the ISO to 122 degrees, 1ml weighs 1.18 grams or 9.847lbs per gallon. Now, that same 550lbs of ISO has a volume of 55.85 gallons. This would give you more clicks per set but have no effect on board feet per set. Now after all of that, I can tell you that pre-warming the drums of chemicals will ensure that your proportioner processes the chemicals closer to the set temperature, especially if you are using a proportioner with only 6,000 watts of heat. Warmer days give better yield because the substrate is warmer. Hope this helps, George
Posted: Nov 15, 2008 09:10 AM	If you are getting maximum yield then you WILL have more 'clicks' on your pump. Each 'click' represents the same amount of material volume filling the pump. The reason you have more clicks is because the foam is going further, or expanding better on the substrate. Therefor that drum set goes further, meaning for each set sprayed, you have more 'clicks' on the pump. Example, if you spray 3.0 lb roofing foam it will cover less than a 2.0 lb insulation foam, because it expands less. Meaning your pump will show LESS clicks on 3.0 lb vs 2.0 lb for the same Volume of material sprayed.
SprayFoamSupply.com Posted: Nov 16, 2008 01:04 AM	If each click represents the same amount of material volume filling the pump, why would you have less clicks with 3lb foam than with 2lb foam? The only way that would be true is if there was less volume of material in a set of 3lb foam than in a set of 2lb foam. Pump strokes measure volume of A and B chemicals, not yield. For example, with a glascraft MH2, take the number of clicks and multiply by .042 and that gives you the gallons of material used. The proportioner has no idea what material is being sprayed or what the material is yielding! George
Posted: Nov 16, 2008 07:38 AM	Let me try this again now that ive had a few cups of coffee. If your spraying 1,000 board feet. and you have the same 2 rigs, one spraying 2.0 and the other spraying 3.0 lb. Which machine will show the most clicks at the end of the job? "answer" The 3.0 rig will show more clicks, because 3.0 lb foam doesnt expand as much as the 2.0 lb. So you will have to spray MORE 3.0 lb foam for the same job,,, meaning,,, more Clicks on the machine for the same amount of board feet. So, the better yield your getting out of the foam, means you will spray less (less clicks) for the same amount of board feet.
Posted: Nov 16, 2008 09:05 AM	Good point guru! Thanks for your post.
Posted: Nov 16, 2008 09:28 PM	And if you were spraying .5# you would have even fewer clicks. But you are not comparing apples to apples. You would need to spray a full set of each and compare the amount of clicks or strokes. If you spray 100 gallons (for example) of each you will have comparable number of strokes. The MH2 that was mentioned above, sprays about 2400 strokes per set regardless whether it is half pound, 2# or roofing foam. The strokes are done by volume through the machine not results of expanded foam. Tim

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Posted: Oct 26, 2008 03:50 PM

maximum yield 1.9

using 1.9 cc with some 1.9 pp (polar pro)
we pressurize opened drums between jobs. 2-3lbs
hose heat at 125. iso pre-heater at 125. resin pre-heater at 130. (hotter for thicker resin)
we always keep material stored at 65-70.
keeping detailed log of yields. getting 1750-1790 clicks out of 25-30 pro currently. 50-60 degree weather. on a 94 degree day we got 1938 out of a set that was the best yield ever. of course, as it gets cooler outside, yield is dropping.
any suggestions for getting more yield? (now or in summer)
i am sure somebody has some angles that i dont know about. thanks.

SprayFoamSupply.com

Posted: Oct 26, 2008 09:59 PM

You seem to be talking about yield being the number of clicks your machines gets rather than the number of board feet you get out of a set? You will get more clicks per set the warmer the drums are. Fluids expand and contract with temp. When the drums are warm, you actually have more material in the drums by volume. That is why the materials are sold by weight.

George

Gerry Wagoner

Posted: Oct 30, 2008 05:16 PM

Yes.

Posted: Nov 07, 2008 07:24 AM

strokes is only a good way to look at volume used...1750 x.063= 110.25 gallons (now if you assume 10 lbs per gallon,,,then 110.25 x10 will give you your weight,,and if you buy by the pound,,,wamma jamma,,,theres the cost of your fluid!!!but not yield...)
yeild is how far the fluids went on the wall,,, most typically expressed in a square foot or board foot coverage...

what georgeousgeorge said...

'dude

Posted: Nov 07, 2008 09:18 AM

the more clicks on the proportioner, the the more board feet board feet we get. board feet are more approximate versus exact clicks on the machine. when we got 1938 clicks, we got about 4800 board feet. (VERY HOT DAY) that will be hard to duplicate in the coming weather.
looking for tips on more clicks (or board feet)
did have a sprayer in florida e-mail me direct and he said he used band heaters & heated the resin to 80 degrees and also mixed the resin. says it works but gotta watch what you are doing.
just used 8.3 sets of polar pro last week on a 5,000 sq ft lake house in Pickney. got an average of 1642 clicks per set. but sure would like to get more out of a set.

SprayFoamSupply.com

Posted: Nov 07, 2008 08:45 PM

The more clicks on the proportioner, the more volume of material flowed through your machine. It has nothing to do with yield. What kind of machine are you spraying with? Do 1900 clicks of 2lb foam yield the same as 1900 clicks of 3lb foam, or open cell foam? No. If you got 1938 clicks on a hot day, then you got 4,800 board feet because it was a hot day. You got more clicks that day because the material in the drum was warm and has more volume to it than it would on a cold day. It comes down to the specific gravity of the material. That is the weight of 1ml of material at a specific temperature. For example 1ml of ISO weighs 1.33 grams @ 68 degrees or 11.099lbs per gallon. If you are getting 550lbs of ISO, then you have about 49.55 gallons of ISO when the drum is 68 degrees. Now, if you warm the ISO to 122 degrees, 1ml weighs 1.18 grams or 9.847lbs per gallon. Now, that same 550lbs of ISO has a volume of 55.85 gallons. This would give you more clicks per set but have no effect on board feet per set.

Now after all of that, I can tell you that pre-warming the drums of chemicals will ensure that your proportioner processes the chemicals closer to the set temperature, especially if you are using a proportioner with only 6,000 watts of heat.

Warmer days give better yield because the substrate is warmer.

Hope this helps,

George

Posted: Nov 15, 2008 09:10 AM

If you are getting maximum yield then you WILL have more 'clicks' on your pump. Each 'click' represents the same amount of material volume filling the pump. The reason you have more clicks is because the foam is going further, or expanding better on the substrate. Therefor that drum set goes further, meaning for each set sprayed, you have more 'clicks' on the pump.

Example, if you spray 3.0 lb roofing foam it will cover less than a 2.0 lb insulation foam, because it expands less. Meaning your pump will show LESS clicks on 3.0 lb vs 2.0 lb for the same Volume of material sprayed.

SprayFoamSupply.com

Posted: Nov 16, 2008 01:04 AM

If each click represents the same amount of material volume filling the pump, why would you have less clicks with 3lb foam than with 2lb foam? The only way that would be true is if there was less volume of material in a set of 3lb foam than in a set of 2lb foam. Pump strokes measure volume of A and B chemicals, not yield.

For example, with a glascraft MH2, take the number of clicks and multiply by .042 and that gives you the gallons of material used. The proportioner has no idea what material is being sprayed or what the material is yielding!

George

Posted: Nov 16, 2008 07:38 AM

Let me try this again now that ive had a few cups of coffee. If your spraying 1,000 board feet. and you have the same 2 rigs, one spraying 2.0 and the other spraying 3.0 lb. Which machine will show the most clicks at the end of the job?

"answer"
The 3.0 rig will show more clicks, because 3.0 lb foam doesnt expand as much as the 2.0 lb. So you will have to spray MORE 3.0 lb foam for the same job,,, meaning,,, more Clicks on the machine for the same amount of board feet.

So, the better yield your getting out of the foam, means you will spray less (less clicks) for the same amount of board feet.

Posted: Nov 16, 2008 09:05 AM

Good point guru! Thanks for your post.

Posted: Nov 16, 2008 09:28 PM

And if you were spraying .5# you would have even fewer clicks. But you are not comparing apples to apples. You would need to spray a full set of each and compare the amount of clicks or strokes. If you spray 100 gallons (for example) of each you will have comparable number of strokes.

The MH2 that was mentioned above, sprays about 2400 strokes per set regardless whether it is half pound, 2# or roofing foam. The strokes are done by volume through the machine not results of expanded foam.

Tim

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