Attaching The First Stage To The Cylinder Valve (Din) - Apeks TEK3/XTX50 Owner's Manual

Regulator Owner's Manual
............................................................................................
Attaching the First Stage to a Cylinder Valve (DIN)
WARNING: OPEN VALVES
SLOWLY TO AVOID OVER-
PRESSURISATION. When
pressurising your SCUBA
system, be sure to open
the cylinder valve slowly to
minimise the generation of
heat. Failure to do so, with
Enriched Air Nitrox (EAN)
present, increases the risk of
combustion that can lead to
serious injury or death.
It is considered safe practice, especially when using EAN, to open the cylinder
valve slowly and let the first stage pressurise slowly. Rapid pressurisation
causes adiabatic compression of the breathing gas, which generates heat
inside the first stage. Heat, along with elevated percentages of oxygen and
an ignition source (from contamination) are the ingredients that can cause
combustion. This is why it is necessary to keep the interior of the regulator
clean and the percentage of oxygen below 40% along with the slow opening of
the valve.
CAUTION! Use a small amount of an appropriate lubricant (such as
Christo-Lube) LIGHTLY applied to the thread of the Din Handwheel pe-
riodically. This prevents seizing on the Cylinder Valve. DO NOT OVER
LUBRICATE or apply to the internals of the handwheel or cylinder valve
gas-way.
To attach a DIN-style first stage to the cylinder valve, follow these steps:
1. Remove the protector cap from the cylinder valve, if fitted. With the cylinder
valve facing away from you, release a small amount of air from the cylinder
by turning the handwheel anti-clockwise to open the valve slightly. When air
is heard exiting, immediately close the valve. This will clear any moisture or
debris that may be inside the threaded cylinder valve opening.
2. Position the first stage near the cylinder valve so that the LP hose of the
primary second stage will be routed over the desired shoulder. Thread
the first stage DIN connector into the cylinder
handwheel by hand until it is lightly snug. DO NOT use tools to
tighten.
valve and tighten the
23