Tracking your money in yield

Tracking product yield is an important part of our day to day operation. If you have purchased or going to be purchasing a mobile spray foam rig or spray foam equipment tracking your money in yield will help fine tune your operational cost and aid in the return of your investment.

Tracking tells us how and if the yield of the product is or is not being installed and/or estimated correctly or if the materials used are inconsistent with expected yield. In the warmer months we can see what yields are achieved in comparison to the colder seasons for losses.

We can compare the yields gained when pre warming the drums. We can see if the applicator is consistent and productive with the application. The crew can also make sure they don’t run out of product, thus requiring costly cleanup, re-purging the spray foam machine and hoses as well as the likelihood of having to rebuild the spray gun.

In addition we can compare how hard the drive systems of different spray machines have to work when processing the products. It’s not difficult to track when using the stroke/cycle counters.

MachineApproximate Output per Cycle
(A+B)
Stroke/Cycle
Per Gallon
GH-25240 cc16
GH-40160 cc24
E-20 Reactor0.0104 gallon96
E-30 Reactor0.0272 gallon37
FF 1600120 cc32

Prior to determining how many strokes to start with know the amount of material in each container and that different size transfer pumps have different lengths and may stop well short from the bottom of the drum. You will need to know what pumps you are using and if you are using the bung adapters or not.

Proportioning pumps are designed to pump on the bases of volume not weight; therefore a weight conversion must take place in order to determine how many strokes a set of foam will produce. A set of foam generally weighs between 1000 and 1051 pounds.

The general weight per gallon is @ 10 pounds. Therefore a 500 pound drum would contain @ 50 gallons. So a 1000 pound set would have @ 100 gallons.

Example 1) Determine amount of strokes for a 1000 pound set utilizing the E-20 96 strokes per gallon x 100 gallons per set = 9600 strokes

Example 2) Determine amount of strokes for a 1000 pound set utilizing the GH-25 16 strokes per gallon x 100 gallons per set = 1600 strokes

Remember these helpful points when processing spray foams:

  • Apply the material within the manufactures recommended processing conditions. Reference the manufacture’s published literature.
  • Both environmental and substrate temperatures including relative humidity and wind can affect the yield.
  • Require the applicator to apply the product consistently while back checking the
    installation.
  • Confirm correct processing conditions have been met.
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Dave Penta

Dave Penta

Dave Penta is the VP of Sales at SprayWorks Equipment Group. For the past 30+ years, Dave has worked with multiple industries including; commercial and residential buildings, along with spray foam and coatings systems.

19 Comments

  1. Great goods from you, man. I have understand your stuff previous to and you are just too great. I actually like what you have acquired here, really like what you are stating and the way in which you say it. You make it entertaining and you still care for to keep it sensible. I cant wait to read much more from you. This is really a terrific web site.

  2. That is a good tip especially to those new to the blogosphere. Short but very accurate info? Thanks for sharing this one. A must read article!

    • Great question, Irving! The output per cycle for the E-XP1 is 0.0104 gal. – making the stroke count the same as the E-20 at 96 strokes/cycle/gallon.

  3. I found your website perfect for my needs. It helped me, and I’ll certainly track and install how you recommend. You have something good going here, keep it up!

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