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This Guide is made available for the express use of owners and users of the Dive Lab XLDS systems.
This information is subject to periodic updates and changes. Always check the Dive Lab web site for the latest versions.
Document XLDS Guide – Section Three
Revised July 17, 2019
7
SECTION THREE: CONFIGURATION AND USE
Ultra Light Umbilicals
The XLDS umbilicals have been specially designed
for use with the manifold compensating
system,
and RDC-2 or RDC-3,
and are not intended to be
used for conventional surface supplied diving.
The umbilical assembly is comprised of four major
components, that are twisted together to form
the complete umbilical assembly, breathing gas
hose,
communications
/strength
member,
penumofathometer hose, and 20’ grab line.
The
divers end has a “D” ring with snap shackle, that
is attached to the communication/strength, and
grab line for securing to the diver worn harness.
The 1/4" I.D. supply umbilical has a design
pressure of 1500 psig, and is rated for a normal
maximum system working pressure of 400 psig.
Both ends have SS swaged 1/4" MPT fittings,
which connect to a 6” adapter hose, that has 1/4”
FNPT on one end, and 9/16 O
2
strait thread on
the other. The topside end connects to a 9/16” O
2
fitting on the outlet of each divers control valve
ALP1R, ALP2G, ALP-3Y on the RDC. At the divers
end, the umbilical to ICS interface hose attaches
to a 9/16” CGA O
2,
male fitting on the ICS one
way valve.
Pneumo hook-up
Standard XLDS Umbilical 300 ft.
Communication Strength
Member
The communication / strength member contains
four (4) wires, for communications and a
polyester strength member. The assembly is
encased in a polyurethane jacket. The strength
member has a safe lifting capacity of 800 lbs, and
a minimum breaking strain of 2200 lbs.
Pneumofathometer Hose
The Pneumofathometer Hose is made from black
nylon plastic, 3/16” I.D. rated, for a maximum
internal pressure of 200 PSIG.
Grab Line
The Grab Line is twisted into with the first 20 feet
of Umbilical at the divers end, to allow for easier
handling by the tenders, and to aid in lifting if
necessary. The Line is standard 3/8” or 1/2"
braided nylon.
Diver Worn Harness and
Manifold Compensating
System
The diver worn intermediate compensating
system (ICS), was designed to allow 1/4" I.D. air
supply umbilicals, to be used with standard
demand mode helmets and masks. The system
allows divers the ability to dive to depths,
previously only attainable when using heavy 3/8”
Umbilicals, and large support systems. The ICS
system with accumulator
cylinder attaches to the
right side of the modified Atlantic Diving
Equipment, or Miller Bell Harness, and fits
securely behind the right arm, in a specially fitted
holster. The umbilical attaches to the ICS, which
reduces the normal umbilical supply of 350 psig,
to between 150-170 psig, over ambient pressure
to the demand mode helmet or mask being used.