Benchy
–
Glycol Instruction Manual
Page
4
of
9
Last Updated 14/12/2020 5:29 PM
Leak Testing Product Lines
It is essential to pressure test all four product lines prior to running any liquid through them for
dispensing.
The product lines need to be pressure tested to a pressure that is at least 1.5 times the pressure that
will be used for dispensing to a maximum of 50psi. For example, if your dispensing pressure is 20 psi
then your product lines should be pressure tested at 30 psi
and your testing pressure shouldn’t
exceed 50 psi.
The product lines can be leak tested via multiple methods which are outlined below. It is a good idea
to test the system using multiple methods to be certain the system is holding pressure:
1.
Pressure decay test
Step 1. Screw a 8mm x 5/8” Duotight fitting onto each all thread shank on the side of the
Benchy.
Step 2. Push 8mm EVABarrier hosing connected to a regulated pressure source into one of
the Duotight fittings.
Step 3. Set the pressure on the regulator to 1.5 times the dispensing pressure up to a
maximum of 50 psi.
Step 4. Turn the gas cylinder off and leave to sit for a few hours. Then check if the pressure
on the regulator has decreased from the set pressure.
If the pressure has dropped double check that the leak isn’t occurring externally from the
Benchy. Check all duotight connections and connections to your gas cylinder or regulator
with a soapy solution to check for the formation of bubbles indicating a leak.
If the pressure remains stable then this product line has passed the leak test.
Perform the above steps on the other product line.
2.
Bubble (Air-leak) test
Step 1. Fill the reservoir with water
Step 2. Screw a 8mm x 5/8”
duotight fitting onto each all thread shank on the side of the
Benchy.
Step 3. Push 8mm EVABarrier hosing connected to a regulated pressure source into one of
the duotight fittings.
Step 4. Set the pressure on the regulator to 1.5 times the dispensing pressure up to a
maximum of 50 psi.
Step 5. Look for the formation of bubbles in reservoir indicating a leak
Repeat the above steps on the other product line.
