Gasmizer Manual - Submarine Manufacturing and Products Ltd

March 09
damaged prior to fitting a GASMIZER system by closing the bell exhaust valve with the
dive control exhaust valve open.
3. Suitable locations for the Reprocessing Unit, Electric Gas Booster, Volume Tank,
Control Console and Bell Equipment should also be identified during this preliminary
survey.
8.2.2 Equipment Installation and Interconnection
There are essentially five items of equipment to be accommodated.
Reprocessing Unit Ideally should be sited in a compressor room or other machinery
space.
Electric Gas Booster Ideally should be sited close to the reprocessing unit for ease of
installation and also to reduce pressure losses between the units.
Volume Tank Siting is non-critical. It can be either beside the reprocessing unit or,
alternatively in the ship’s gas storage area.
Bell Equipment Should be mounted in the bell as close as possible to diver gas supply
pressure gauge and shut-off valve. The bellman should have easy access to the water
trap.
Control Panel Should be mounted in a prominent position in dive control. During diving,
the volume tank pressure and BPR pressure are probably the two most important
gauges for the dive supervisor.
The system may be installed with rigid stainless or tungum pipework (apart from O 2
pipework which will be copper or tungum). Installations will be purged to remove all
swarf, cuttings etc. and O 2 cleaned after installation.
8.2.3 Commissioning
The following steps should be carried out after installation:
1. Pressurise system and check for leaks.
2. Carry out hydraulic/pneumatic pressure testing as required by client. It is
recommended that the system be tested to its full working pressure.
Gas Supply System
Gas Exhaust System
O 2 System
Full working pressure 100 bar (1500 psi)
Full working pressure 68 bar (1000 psi)
Full working pressure 50 bar (725 psi)
3. Purge the system by pressurising with desired heliox mix to 10 bar using the
make- up panel and vent to atmospheric pressure. Connect O 2 supply to Reprocessing
Unit by opening isolating valve.
4. Check that exhaust and supply umbilical as fitted comply with the table shown
below for the proposed diving depth.
OM002 Rev 5 Page 76 of 168 Chap 8