6
5373 Air Activated Tube Tester
OPERATING INSTRUCTIONS (CONT.)
Testing Procedure:
Never actuate the injection gun unless the seal assembly is installed within the proper ID tube as the
washers could be forced into the seal ID.
The 5373 Tube Testing Guns come as a set. This set is comprised of: an air injection gun and a
plugging gun. The air injection gun can be differentiated from the plugging gun because it incorporates
the air control valve (10) and bleed valve (12). The plugging gun is a slave to the injection gun and will
not operate without it.
1. Attach air supply to the air injection gun. The 5373 test guns will be operational on plant air supplies
ranging from 40 to 125 psi (2.7 to 8.6 Bar) at a minimum of 5 cfm. If testing tube ID’s from 0.28 to 0.48”
(7.1 to 12.3 mm) the regulator assembly is required. Install regulator assembly (14) with arrow pointing
towards gun onto reducing nipple (11) leak tight and attach air supply to regulator input. For tube ID’s
from 0.28 – 0.48” adjust regulator to 40 – 60 psi (2.7 to 4.1 Bar) by rotating adjustment knobs while
viewing gage.
2. Insert the air injection gun into one end of the tube to be tested and the plugging gun into the other
end. Apply enough pressure to seat the back-up washer (3) firmly against the end of the tube. Maintain
this pressure throughout the test.
3. After making sure that the plugging gun operator is ready, press the air control valve (10) on the
injection gun and hold until the reading on the pressure gauge (7) stabilizes.
4. Release the button on the air control valve (10). It will automatically return to the closed position
isolating the tube being tested. The tube is now under pressure.
5. Both injection gun and plugging gun operators should observe the pressure gage (7) on their
respective guns. Any decrease in the pressure indicted on the gauge (7) will indicate a leaking tube.
6. Press the bleed valve (12) on the injection gun to bleed off the air pressure in the tube and air cylinders
and to relax the seals.
7. Remove the test guns and move on to the next tube. Mark each leaking tube encountered for repair.
The total operation should be completed in 5 to 10 seconds. Your actual testing time will depend on
the amount of time you choose to hold the test pressure.
8. Repeat steps 2 through 7.
