Helmet Features - Kirby Morgan 77 Operation And Maintenance Manual

WARNING
The demand regulator and side
block assemblies have a maxi-
mum design pressure of 225
p.s.i.g. (15.5 bar) over-bottom.
Higher pressures could lead to
component failure and serious
personal injury.
WARNING
Gas systems used to supply Kirby Morgan
helmets and masks must be capable of sup-
plying gas to the diver at the required pres-
sure and flow rates as stated in the opera-
tional specifications. The use of unregulated
gas sources is extremely dangerous.
The use of standard SCUBA type regulators
is unacceptable, as there are no provisions
for adjusting the intermediate pressure to
the diver. Only proven systems that allow for
varying the gas supply pressure to the diver
should be used for umbilical diving.

2.8 Helmet Features

All Kirby Morgan diving helmets are manufactured
by hand. Each step of the manufacturing process is
carefully controlled to assure the customer a high
quality, durable helmet that will function properly.
Development of the KM77 was started in 2005. The
goal was to bring together all of the top design ele-
ments of the various Kirby Morgan helmets and then
refine the mix into what we at KMDSI consider to
be among the best in current diving helmet design.
The KM 77 takes some of the proven design features
of our world famous SuperLite
in many of the advanced design features of the
SuperLite 27. Add in some balance refinements, a
®
stainless shell, sideblock, and our REX
and you have a superb diving helmet. Exemplify-
ing our adherence to the highest quality and proven
superior work performance, the KM 77 is another
outstanding helmet from Kirby Morgan.
The KM 77 incorporates the innovative locking sys-
tem and communications system of the SuperLite
27 onto a larger KM47 size stainless steel shell. The
77 features the REX adjustable demand regulator
®
which provides superb breathing gas flow during
peak work output. This is the same regulator used
on the KM47.
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
17 A/B and blends
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regulator,
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®
The helmet consists of two pieces: the helmet shell/
helmet ring and the neck dam/neck ring assembly.
The machined helmet ring houses the sealed pull
pins and locking collar, and provides protection for
the bottom end of the helmet. The adjustable neck
pad on the locking collar, in combination with the
internal chin strap and adjustable head cushion, gives
the diver a secure, custom tailored fit in the helmet.
The superior fit and balance makes the helmet sit
comfortably for long periods of time even when
working in the face down position.
A quick change communications module, available
in either bare wire posts or a waterproof connector,
allows for easy, efficient maintenance of the com-
munications in the helmet.
The KM 77 has the REX
is recommended for diving in contaminated water.
WARNING
Before attempting any diving
in any type of contaminated
water, a complete diving and
topside course in hazardous
materials emergencies should
be completed. The divers and the topside
team must be properly trained and have the
proper safety equipment. All helmets and
suits can leak water under certain conditions.
Divers should use extreme caution when div-
ing in contaminated waters.
Other helmet features which are common to the
KM77 and other KMDSI helmets include:
• the face port
• communications components
• the oral/nasal mask (KM47 only)
• the nose block device
• the head cushion (SL27, 37, 47 & 57)
• neck dam (SL27, 37, 47 & 57)
Many of the breathing system components on these
helmets are also compatible with the KMB 18B and
28B full-face masks and the EXO-26. This helps re-
duce the inventory of spare parts that must be carried
by commercial diving companies.
Each step of the manufacturing process is carefully
controlled to assure the customer of a high quality,
durable helmet that will function properly. The fol-
lowing is a general description of the features of the
KM 77.
Kirby Morgan 77
®
exhaust system, which
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