![Kirby Morgan SuperLite 27 Скачать руководство пользователя страница 34](http://html.mh-extra.com/html/kirby-morgan/superlite-27/superlite-27_operation-and-maintenance-manual_1971913034.webp)
18
© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130115001
SuperLite
®
27
®
The KMDSI Overpressure Relief Valve, (part number
200-017) is fully adjustable and rebuildable and has
been designed to relieve any over-pressurization of
the first stage regulator greater than the desired set-
ting.
Every bailout (Emergency Gas System or EGS) first
stage regulator must be fitted with an overpressure
relief valve to prevent over pressurization of the EGS
L.P hose and possible total loss of the emergency
supply gas in event of regulator failure.
The over-pressure relief valve
should be installed on every first
stage used for bailout.
KMDSI Part #200-017
NOTE: This valve can be adjusted for vari-
ous relief pressures.
WARNING
Be sure the Emergency air/gas first stage
regulator is fitted with a relief valve to
help prevent over-pressurization of the
emergency gas supply hose. A leaky first
stage can overpressure the hose result-
ing in hose rupture. This would cause a
loss of the entire emergency gas supply,
with possible serious injury or death.
2.8.4 Helmet Attachment to the Diver
On the helmet, the neck ring on the base of the helmet
shell has a machined O-ring sealing surface. The O-
ring that seals against this surface sits inside the neck
dam ring assembly. The neck dam ring is actually a
three part ring, consisting of the upper split rings and
the lower stepped ring. The neck dam is captured
(sandwiched) between these parts.
The locking collar and neck pad assembly has a
smaller opening than a diver’s head so the helmet
cannot be accidentally dislodged on most divers. The
neck pad pushes against the neck dam and lower por-
tion of the head cushion firmly securing the helmet
to the diver’s head. The neck pad also helps prevent
neck dam ballooning. Each diver must personally
adjust the fit on his helmet by adjusting the neck
pad, as well as the head cushion. All of these parts
together help provide a good fit.
Both sides of the helmet locking collar have a latch
catch block to receive the locking sealed pull pins. If
the sealed pull pins are turned to the locking position
while the locking collar is open, the locking collar
will snap into the locked position when it is pushed
up into the helmet neck ring. The sealed pull pin
on each side must be pulled to release the locking
collar to remove the helmet. This system provides
an extremely secure method of attaching the helmet
to the diver.
The head cushion is made from layers of open cell
foam inserted in a head shaped nylon bag. Adding
or subtracting foam layers from the bag can adjust
the fit of the head cushion. The head cushion must
be adjusted correctly for the helmet to fit properly.
The chin strap inside the helmet must be fastened
properly under the diver’s chin prior to diving. This
is essential for the diver’s comfort. Also, in the rare
case where the pull pins are opened underwater, and
the helmet separates from the neck dam, the neck
strap will help to keep the helmet on the diver’s head.
The relationship between the locking collar assembly,
head cushion, chin cushion, and helmet shell all affect
the fit of the helmet.
Hinge
bolt
Nut
Locking
collar
Neck pad
Adjustment nut
Washer
Washer
Screw
T-washer
O-ring
Split
Ring
Neck
dam
Stepped
Ring
Pull
Strap
The Neck Dam and Locking Collar Assemblies.