4.6 Demand Regulator Malfunction
Symptoms
Probable Cause
Remedy
Regulator continuously free flows. Adjustment knob not screwed in.
Screw in adjustment knob.
Bent tube damaged causing mis-
alignment of adjustment nipple.
Check the inlet nipple and soft seat.
Replace as necessary.
Supply pressure too high.
Adjust supply pressure lower than
225 p.s.i. over ambient.
Regulator out of adjustment.
Adjust regulator
Regulator continuously free flows
when underwater only.
Neck dam turned down, or too large
for divers neck.
Neck dam must be turned up. Re-
place neck dam with proper size.
Hair caught between o-ring and
base of helmet.
Clean hair out.
Neck dam torn.
Repair or replace neck dam.
Poor seal in neck dam ring As
-
sembly
Replace O-rings
Regulator is hard breathing.
Adjustment knob screwed too far
in.
Screw adjustment knob out.
Supply pressure too low.
Increase supply pressure.
Regulator improperly set up.
Regulator does not supply gas.
Gas supply pressure too low.
Increase supply pressure to mini-
mum required for depth.
Regulator is out of adjustment.
Adjust regulator
No gas in umbilical
Turn diver’s gas supply on topside.
Blockage in breathing system.
Disassemble regulator, clean, and
adjust.
4.7 Emergency Gas Supply Valve
Symptoms
Probable Cause
Remedy
Bail-out bottle drained without
diver opening EGS valve
Stem fails to seat in valve body.
Replace EGS valve body.
Debris under sea causing leakage. Service valve.
Leaking over-pressure relief valve
on bail-out regulator.
Service valve.
Leaking bail-out regulator on bottle. Service regulator.
Leak in supply line 1st stage
Service regulator.
Knob difficult to turn.
Stem bent.
Replace stem.
Valve will not flow gas.
Foreign matter in valve.
Disassemble, clean, and
reassemble.
Stripped control knob.
Replace knob.
© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318002
55
Kirby Morgan
®
37SS
Chapter 4 - Water Leakage Into Helmet
