• Test nipples installed in the downstream pressure tap port of each automatic safety shutoff valve
• Transparent glass of water filled at least 1 inch from the bottom
• Leak test tube: aluminum or copper 1/4-inch rigid tube with a 45 degree cut at the end
• All-purpose liquid leak detector solution
Perform these steps to test for valve leaks.
1.
With the upstream ball valve open, the downstream ball valve closed, and both valves are energized,
apply an all-purpose liquid leak detector solution to the areas indicated in the illustration below.
• Any accessories mounted to the safety valve
• All gas piping and gas components downstream the equipment isolation valve
• Inlet and outlet gas piping of the automatic safety shutoff valve.
The presence of bubbles indicates a leak, which needs to be fixed before proceeding. Replace the
valve, reassemble, and retest for bubbles.
2.
Remove all power to the burner system, and verify that both automatic safety shutoff valves are closed.
3.
Close the upstream and downstream manual ball valve.
4.
Using a screwdriver, slowly open the V1 test nipple (port 2) by turning it counter clockwise to
depressurize the volume between the two valves; then connect the 1/4-inch flexible hose to the test
nipple.
5.
Slowly open the upstream manual ball valve; then allow time for potential leakage to charge the test
chamber before measuring the valve seat leakage.
6.
Immerse the 1/4-inch tube vertically 1/2-inch (12.7 mm) below the water surface. If bubbles emerge
from the 1/4-inch tube and after the leakage rate has stabilized, count the number of bubbles
appearing during a 10 second period. (See table below for allowable leakage rates.)
Service and maintenance
Global Finishing Solutions
32
239-062 rev 5
