Apeks TX50 - External Leak Testing; Subjective Breathing Test

12
TX Second Stage Regulator Maintenance Manual
13
TX Second Stage Regulator Maintenance Manual
FINAL TESTING (CONTINUED)
External Leak Test
1. After disconnecting the regulator from the ow bench,
connect it to a SCUBA cylinder lled to approximately 200
bar or 2900 psi. Open the cylinder valve to repressurise the
regulator, and submerge the entire system in a test tank of
clean water.
2. Observe any bubbles arising from the submerged
regulator over a one minute period. The recommended
time is necessary due to slower bubble formation
that occurs in smaller leaks. Bubbles indicate a leak,
which requires the system to be disassembled at the
source to check sealing surfaces, assembly sequence
and component positioning in order to correct the
problem(s).
NOTE: Extremely small leaks may be better detected
by applying a soap solution or Snoop™ to the leak
area. Bubble streams will indicate the source of the
leak. Before disassembling to correct any leaks,
rinse the entire regulator thoroughly with fresh water
and blow out all residual moisture with ltered, low-
pressure air. Disassemble and remedy the problem,
referring to “Table 1 - Troubleshooting.”
Subjective Breathing Test
1. Depress the Purge Button fully to ensure that an
adequate volume of air needed to clear the second
stage ows through the mouthpiece. Then, inhale
slowly but deeply from the mouthpiece. A properly
serviced and adjusted regulator should deliver air upon
deep inhalation without excessive inhalation effort,
freeow, or “uttering” of the second-stage diaphragm.
When exhaling, there should be no uttering or sticking
of the exhalation valve. If any of these problems occur,
refer to “Table 1 - Troubleshooting”.
This Ends Reassembly