SLT-60 Surface-supplied diving system

SLT-60 Surface-supplied diving system
Surface-supplied diving system
Ordering information
SLT60 complete set
The SLT-60 is a surface supplied diving system designed to
simultaneously support two divers conducting heavy work
to a depth up to 60 msw, carrying out all manner of underwater work including conducting surveys, maintenance,
defect rectification, cutting and welding etc. The system
may be used for all underwater maintenance work and
may be used for diving in both polluted and cold waters.
Decompression underwater
Divers would normally use breathing air for most diving
operations. Switching over from air to oxygen for decompression purposes during ascent is manually possible by
means of the air/oxygen selection valves. A safety blocking
system prevents the operator from switching to oxygen before the diver has ascended to a safe depth of seven metres.
Should the diver attempt to descend while breathing oxygen, the supply of oxygen is automatically switched over to
air once the diver reaches the 9m mark. This is a safety feature working against accidentally supplying the diver with
oxygen should he descend to an unsafe depth.
The Surface-supplied diving system SLT 60 has been manufactured in accordance with the German standard DIN 58642
for hose supplied diving apparatus as well as the 1993/2000
EN 250 HSE & NPD regulations for Diving equipment. It also
complies fully with the new European standard for Surface
Demand Diving Equipment.
Major components
1. The DCP with Gas supply System.
2. Oxygen Supply System.
3. Air Supply System.
4. Communication System.
5. Depth Monitoring System.
6. Inflator System.
7. Diver’s Umbilical (100m).
8. Diver’s Safety Harness.
9. Buoyancy Aid.
10. Bailout Set.
11. Demand Diving helmets.
12. Diver’s Dry suits.
1. SLT60 Dive Control Panel
The DCP is built into a rugged transport case made from hard
plastic material. The case is fitted with two lifting handles
in either end and is supplied with a wall mounting bracket.
All of the components are mounted onto the stainless steel
front plates, which are marked with flow lines and labels. The
gas supply lines are colour-coded and are configured to allow
each line to be used separately and independently for each
2. Oxygen supply system
The DCP is equipped with an independent low-pressure oxygen supply line located above the two main supply lines on
the lower panel. The oxygen supply line is connected to each
diver’s supply line at the Gas Selection Valves. These valves
offer both automatic and manual functions. A High Pressure
(HP) regulator, fitted to a HP (200 bar) oxygen cylinder, is connected to the DCP by means of a flexible low pressure (LP)
hose (5m) and quick fit couplings. Oxygen is supplied to the
panel at a pressure of 11.5 bar.
For a complete list of the contents, please ask IHC Hytech.
The front plates can be removed for inspection and maintenance by loosening the securing bolts located around the
edges of the plates. The lid of the control panel is secured
with wires on either side to keep it open during operation.
The SLT 60 DCP is designed for two divers. Two flexible highpressure hoses fitted with DIN 200 bar connections are connected to the high-pressure inlets.
Each diver has his own independent supply line incorporating a high performance twostage pressure reducing system. The 2 main supply lines are interconnected at a point by means of a crossover line fitted
with a 90° quarter turn ball valve. The crossover valve
is situated at the intermediate pressure level (24 bar).
Dive control panel
3. Air supply system
The two high pressure (HP) supply lines lead from the HP
inlets to two fixed pressure reducers, which are factory adjusted to 24 bar. A HP gauge displays the Inlet pressure. Gas
flows past a non-return valve and to a line connecting the
two supply lines. The line is fitted with a shut-off (crossover)
valve. The air supplied from either one of the two supply lines is adequate to supply two divers working at a maximum
depth of 60 m.
Two HP and 2 Medium Pressure (MP) gauges show the values of the incoming air supply sources. The reduced pressure supply lines lead to the two ‘Depth tracking’ pressure
4. Diver communication system
The SLT 60 2-Diver diverphone is a stationary unit which is
built into the lid of the control panel. The diverphone is suitable for full duplex communications and is fitted with military style connectors.
Both divers and tenders have their own separate volume controls for independent operation. A connection switch allows
both divers and their tenders to talk freely with each other
on an open system should the need arise.
6. Inflator system
The SLT 60 is equipped with a separate inflator system, which
supplies both the dry suit inflator valve and the buoyancy aid
inflator valve. The inflator hose in the diver’s umbilical is attached to a quick coupling in the DCP, which has its own separate shut-off valve.
At the diver end of the Inflator hose, the hose terminates in
a ‘Y-Piece’ to which the short inflator hoses for the Buoyancy
Aid and the Dry-Suit are attached. Accordingly the diver can
fill both devices with air from the surface supply.
7. Diver umbilicals
The diver’s umbilical provides the divers with life support and
communication systems as well as essential diver services
such as power and communication. The twisted rope-play
structure of the umbilical gives the umbilical great tensional
strength and does away with the need for additional safety
The supply umbilicals are 100 m in length which is adequate
for most diving operations down to 60 meters where slack
and spare length is required on the surface.
The SLT 60 Diverphone has a built in rechargeable 12-volt
battery and charger unit. Voltage selection is fully automatic.
5. Depth monitoring system
The depth of each diver can be read on the two precision
depth gauges. (See next figure). The depth gauge is connected to the depth measuring hose in the diver’s umbilical,
which ends in the divers chest area.
The water pressure, equivalent to the diver’s depth, is displayed on the gauge. Small bore hoses connect the depth
monitoring hoses to the depth tracking reducers and the oxygen limitation valve in the oxygen supply line. The operation
of the depth monitoring system is automatic once the diver
enters the water. The minimum flow rate is adjusted for a
decent rate of 18 m / min.
The SLT 60 umbilical is a twisted rope-play unit consisting of
four components:
• The main air supply hose (3/8”)
• The suit inflation hose (1/4”)
• The depth measuring hose (1/4”)
• Combined video
All components are salt water-resistant, have a polyurethane
(PU) outer jacket and are colour coded. The twisted rope-play
structure of this umbilical eliminates the necessity to
tape together all the various cables and hoses as well as giving the umbilical a tidy appearance.
Depth gauges
8. Divers safety harness
The emergency air cylinders (Bailout Set) and the diver’s
umbilical are attached to the divers safety harness, which is
made of salt water resistant materials. The harness is built
in a jacket style and has a single waist strap fitted with a buckle, three crutch straps and two adjustable shoulder straps.
number of other components and accessories such as the
communications system, the free flow valve, the welding visor, video cameras and underwater lamp units.
12. Diving suits
The standard SLT 60 dry suit (Viking Pro-HD) is fitted with a
neoprene rubber neck seal, a dry yoke as well as suit inflation
and exhaust valves. The suit comes with a standard Dry- Ring
cuff system for use with dry rubber gloves. The neck ring is
donned separately and is not attached to the dry suit. A dry
yoke suit is especially useful when diving in cold or contaminated waters. Air is fed to the dry suit via the suit inflation
hose to compensate for a loss of buoyancy resulting from increasing depth. The air also provides an air cushion to keep
the diver warm and eliminate squeezing by the suit.
Buoyancy aid
9. Buoyancy aid
The diver’s safety harness is also fitted with a Buoyancy Aid.
It is designed to assist the diver during ascent from great
depths without him having to overexert himself. The Buoyancy Aid has 20.4 kg lift capacity and is connected to the suit inflation hose supply system in the umbilical. A ‘Y’- Piece splits
the gas supply to both the diver’s suit inflation valve and the
Buoyancy Aid.
SLT60 used in desert conditions
The Bailout Set is mounted in a heavy-duty fibre glass housing which is attached to the diver’s harness by means of a
stainless steel Quick-snap mounting bracket. The cylinders
are located with the valves at the bottom (back mounted)
where the diver can easily reach the valves on either side.
11. Demand diving helmet
The SLT-60 light diving helmet consists of the helmet body,
the neck ring assembly, and the head cushion. The neck ring
assembly is permanently attached to the diver’s dry suit
but can be worn separately using a different dry or wet suit.
The diver’s helmet protects the diver against the cold and
blows to the head. The helmet is also used as a mounting
platform for the demand regulator, the Bailout valve and a
SLT60 used in arctic conditions
IHC Hytech BV
Elftweg 3, 4941 VR, Raamsdonksveer
The Netherlands
T +31 162 52 22 02
F +31 162 51 90 69
All rights reserved. Reproduction in any form or by any means is not allowed,
without prior permission in writing from IHC Hytech BV
10. Bailout set
The bailout set (emergency air system) consists of two 4-liter - 200 bar steel air cylinders. The bailout set is carried on
the diver’s back and is attached to the safety harness. An immediate supply of breathing air available to the diver in the
event of a failure of the umbilical supply.
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