Each charging unit comprises a waterproof, robust, injection moulded case mounted:
- Haskel Air driven oxygen gas booster featuring:
- Air inlet to air drive controls
- Air drive filter
- Air drive pressure regulator
- Air pressure gauge
- On/off speed control valve
- Inlet gas bulkhead connection
- Inlet 5 micron gas filter
- Inlet pressure gauge (gas safety pattern)
- Outlet pressure gauge (gas safety pattern)
- Outlet relief valve
- Outlet isolation valve
- Outlet gas bulkhead