Gasmizer Manual - Submarine Manufacturing and Products Ltd

March 2009
CHAPTER 1
INTRODUCTION
CONTENTS
Page
General Description..................................................................................................................... 1
Layout and Operation of Equipment ............................................................................................ 2
Diver Equipment ......................................................................................................................... 4
Bell Exhaust Equipment .............................................................................................................. 4
Reprocessing Unit ....................................................................................................................... 5
Electric Gas Booster .................................................................................................................... 8
Gas Supply System ..................................................................................................................... 8
Control Console........................................................................................................................... 9
Safety and Gas Quality................................................................................................................ 11
List of Figures
1 LAYOUT AND OPERATION OF EQUIPMENT ...................................................................................... 3
2 ULTRAJEWEL HELMET ........................................................................................................................ 4
3 BELL EXHAUST EQUIPMENT............................................................................................................... 5
4 LP GAS SYSTEM SCHEMATIC............................................................................................................. 6
5 HP GAS SYSTEM SCHEMATIC ............................................................................................................ 7
6 ELECTRIC GAS BOOSTER................................................................................................................... 8
7 CONTROL CONSOLE............................................................................................................................ 10
1.1 General Description
1.1.1 The purpose of the GASMIZER diver gas recovery system is to recover gas mixtures
breathed by divers, re-process it and deliver it into the supply system. The gas is removed from
the helmet or mask as its is exhaled by means of a recovery valve. From there it is passed via
the bell to the surface where the gas is scrubbed to remove carbon dioxide, filtered to remove
moisture and any particulate or biological contaminant, and oxygen is added to give the desired
breathing mix. The gas is compressed and delivered to storage until required for use when it will
be delivered to the bell gas supply console.
1.1.2 The system requires a minimum amount of equipment on the bell, so adding negligible
weight and taking up little space. No electrical connections are required in the umbilical so there
is no possibility of communications interference or electrical hazard underwater. Because the
major components are topside, it has been possible to design the system such that it may be
serviced while a dive continues.
1.1.3 In addition to recovering divers gas, the system may be used to recycle bell gas, thus
reducing gas loss due to bell flushing.
Chap 1 Page 1 of 168 OM002 Rev 5