Immersion Testing - Apeks XTX FSR Maintenance Manual

2. Thread the Environmental End Cap (1) onto the
Diaphragm Clamp (6) until hand tight. Using the C
Spanner (PN AT30), tighten the Environmental End Cap
(1) until there is metal to metal contact. Re-check the
medium pressure, making sure that it is still between 9
and 10 bar.
NOTE:
Lightly press the diaphragm whilst tightening
the end cap, once the first stage has been depressurised
the diaphragm will assume a concaved positioning for
added protection.
3. Close the cylinder valve and depressurise the
regulator. Remove the test gauge and reinstall the
Blanking Plug.
This Ends Reassembly
IMMERSION TEST
With the Blanking Plugs and at least one properly
adjusted second stage installed, slowly open
the cylinder valve and pressurise the first stage.
Completely Submerge the first stage in fresh water
and check for leaks.
NOTE:
Do not confuse bubbles from trapped air with
a true air leak. If there is an air leak, bubbles will come
out in a steady constant stream.
Assuming that there are no leaks, close the cylinder
valve and depressurise the regulator. Remove the first
stage from the valve and secure the Protective Cap
(22) in place with the Yoke Clamp Screw (24). If the
regulator has a DIN connection replace the Protective
DIN Cap (34).
If a leak is detected, note the source of the leak and
refer to the troubleshooting table on page 12 for
possible causes and corrective actions.
This Ends Testing
XTX FSR & FST First Stage Regulator Maintenance Manual
11