| | | 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. | | |
| | | 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 | | |