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© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130115001
SuperLite
®
27
®
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.
WARNING
2.7 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.
The SL 27
®
was developed in 1991. The goal was to
bring together all of the top design elements of the
various SuperLite
®
helmets and then refine the mix
into what we at KMDSI consider to be an outstand-
ing diving helmet design. The SL 27
®
takes the best
design features of our world famous SuperLite
®
-17B
and blends in many advanced design features. Add in
some fine tuned balance refinements and you have a
low volume diving helmet. Exemplifying our adher-
ence to the highest quality and proven superior work
performance, the SL 27
®
is one of the standards of
the commercial diving industry worldwide.
The SL 27
®
incorporates an innovative locking sys-
tem and the SuperFlow
®
350 large tube adjustable
demand regulator which provides an outstanding
breathing gas flow during peak work output.
The helmet consists of two pieces: the helmet shell/
helmet ring and the neck dam neck ring assembly. The
machined brass helmet ring houses the latch catches
and provides protection for the bottom end of the
helmet. It also mounts an externally adjustable chin
support. This support, along with the adjustable neck
pad on the locking collar, gives the diver a secure,
custom tailored fit in the helmet. This custom fit and
balance seats the helmet 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 SL 27
®
is configured to receive the umbilical
over the shoulder.
In the past, the optional Double Exhaust System (Part
# 525-102) was available to reduce the possibility of
back flow of water and contaminants into the helmet.
This system has been used successfully for diving in
biologically contaminated environments for many
years. To further reduce the possibility of water intru-
sion regardless of the exhaust system being used, the
diver should avoid working in an inverted position.
The double exhaust was replaced by the Tri-Valve
®
System. The unique design of the Tri-Valve
®
helps
keep exhalation resistance low while maintaining
excellent watertight integrity.
WARNING
Before attempting any diving in any type
of contaminated water, a complete diving
and topside course in hazardous materi-
als 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
diving in contaminated waters. For more
information see the book “Diving in High-
Risk Environments” by Steven M. Barsky.
When diving in heavy current (i.e. exceed-
ing 3 knots) the single exhaust system
on all KMDSI masks/helmets could allow
water to enter, due to turbulence/eddy-
ing. It is important for the user/diver to
take excessive currents into consider-
ation. The Tri-Valve
®
Exhaust
®
system
(Part # 525-755) will help prevent water
intrusion when diving in heavy currents.
The Tri-Valve
®
provides exceptionally low
exhalation resistance.
CAUTION
The Tri-Valve
®
exhaust system is now standard equip-
ment for the SL 27
®
. This superior exhaust system
has exceptionally low exhalation resistance, and helps
to keep the helmet free of contaminants in polluted
water. The Tri-Valve
®
isolates the breathing system
from the surrounding water with a three valve, low
breathing resistance design (Patents Pending).