56
Zaxis Inc. LLC
801.264.1000
2442 South 2570 West
West Valley City, UT 84119
7.1
Internal Leak Self Test.
At the factory a baseline leak test is performed to verify leak-tightness and functionality.
This test is a good indicator of an internal leak. The parameters are listed below:
Fig. 19a. Pressure settings screen. Fig. 19b. Settings screen.
Running a capped port test with these parameters should yield a decay value less than
0.005 psig (0.344 mbar).
Valve Manifold
The most common place for leaks
to occur is at the junction of the
test port tting to the valve mani-
fold.
Fig. 20. Valve manifold.
Valve 1
Valve 2
Pressure Transducer
Pnuematic Diagram
When the test pressure is vented, the airow
path is through Valve 1 (on) and out to atmo-
sphere through Valve 2 (off).
Debris from test parts or dirty air can be
trapped between the spider seal and valve
seat of the 2-way valve, holding the valve in
an open position.
Fig. 21. Pnuematic Diagram
Pressure Transducer
Test Port Fitting
2-Way Valve
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