A pocket guide to ChemCo Systems' Model B concrete crack epoxy injection pump Pressure Ratio Testing procedures. Includes an outline of test procedures, required materials/equipment, and test results analysis.

1. October 2013
ChemCo Systems

2. This presentation is intended to be a review of the Model
B Pressure and Ratio Testing Procedures for those that
use a Kemko Model B Injection Pump and have already
taken the ChemCo Systems, Inc. Applicator Course.
Other pumps may require different procedures, and
this guide is not an adequate substitute for the course.
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3. Before starting each day, and after every
2 hours of injecting, conduct first, a
pressure test followed by a ratio test to
ensure that the correct amount of each
component are being delivered.
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4.  Ensure all materials are on hand:
• Pump, power source, appropriate Kemko® or
CCS™ injection resin, flushing solvent, ratio
testing kit, appropriate tools and clean-up
materials, spare parts, gloves, safety glasses,
MSDS’s on-site, long-sleeves, eye-wash
capabilities on-site, & proper disposal ability.
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5. ChemCo Systems Concrete Crack Injection Process: Ratio Testing
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ChemCo Systems
Ratio Testing Kit
(attaches to the
door of the pump)
Two material
containers
(ideally
graduated
cylinders, but
disposable cups
work ok)

6. Connect Ratio Test Kit to hose lines from
the Model B Pump via quick connections.
Open the pressure switch to allow the
pump to reach higher pressures.
Close injection head, then pump until
pressure in each line (A & B Lines) is over
160 p.s.i.
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7. Turn off the pump.
Bleed the line until the line pressure is
160 p.s.i.
The pressure in the line should stay
constant for 5 minutes. If the pressure
drops by more than 10 p.s.i. over the 5
minute period, inspect your pump for
leaks.
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8. ChemCo Systems Concrete Crack Injection Process: Ratio Testing
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 Connect ratio testing
device and run pump
at 160 p.s.i., collecting
the material in two
containers.
 Confirm that the Part
A:Part B ratio is 2:1 (by
volume) .
 Call ChemCo Systems
for technical advice if
the ratio test results are
poor.

9. Clean ratio kit thoroughly.
If you are not performing crack injection
on the same day as the ratio test, flush the
Model B Pump with solvent.
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