Emergency Gas Supply System (Egs) - Kirby Morgan 77 Operation And Maintenance Manual

This adjustment knob allows the diver to make cor-
rections to compensate for a wide range of incoming
gas supply pressures.
The adjustment knob operates by simply increasing
or decreasing the amount of spring bias tension on the
demand regulator inlet valve. The adjustment knob
has a range of approximately 13 turns from full in
to full out. The intent of this bias adjustment device
is strictly to allow the diver to make adjustments for
variations in umbilical supply pressure.
This adjustment device is not intended as a minimum-
maximum device. Minimum and maximum applies to
supply pressure only. The adjustment knob should be
adjusted by the diver to be at the easiest breathing set-
ting at all times. The exact number of turns required
is dependent on the supply pressure.
Water Dump
Regulator
valve
Mount Nut
Exhaust
Main Body
Valve Seat
Starboard Whisker
Exploded view of the REX
(Rebuild with kit #525-310)
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
Thrust
Exhaust
Washer
Valve
Tie Wrap
Main tube
Horseshoe
Inlet valve
O-ring
regulator.
®
CAUTION
Diving a KMDSI helmet or band mask
with a bias setting greater than that just
necessary to keep the demand valve
from free flowing increases the work of
breathing and reduces the diver's ability
to perform heavy work.
CAUTION
The regulator adjustment knob should
be adjusted to the easiest breathing
setting at all times. Adjusting the regu-
lator further in than necessary to keep
from free-flowing increases breathing
resistance.

2.9.3 Emergency Gas Supply System (EGS)

KMDSI strongly recommends that the working diver
carry an independent supply of compressed gas (or
air) fitted with a first stage regulator and hose that is
connected to the inlet of the Emergency Gas Supply
Valve (EGS).
Port Whisker
Tie Wrap
Spring
Regulator body
Roller lever
Adjustment
lock nut
Nipple tube
Kirby Morgan
O-ring
Nut
Spacer
Spacer
Sleeve
Exhaust valve
Diaphragm
Cover
Washer
Cover
Retaining Ring
77
®
Knob
Roll pin
Adjustment
shaft
19