Gasmizer Manual - Submarine Manufacturing and Products Ltd

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March 09 Fig 1 Bell Equipment 4.1 General Description 4.1.1 The bell equipment carries out several functions. First, the pressure in the diver’s exhaust umbilical is regulated to the optimum value. Second, a water trap is provided to remove free water prior to returning gas to surface. In addition, the SAECO valve which performs an important safety function is housed within the bell equipment. OM002 Rev 5 Page 20 of 168 Chap 4
March 2009 4.1.2 The overall layout of the bell equipment is shown in Fig 1. The main components are as follows: 1. The back pressure regulator (BPR) loader valve – controls the setting of the back pressure regulator. 2. Pressure gauge – displays the pressure in the water trap, which is the same as the pressure in the exhaust umbilical if the isolating valve and SAECO valve are open. 3. Bell scrubbing valve – allows recovery and re-cycling of bell gas. 4. SAECO valve – (Supply Actuated Exhaust Cut-Off valve) - isolates the exhaust umbilical from negative pressure in the event of a gas supply failure. 5. Exhaust umbilical isolating valve (Diver 1). 6. Water trap – collects any water present in the exhaust umbilical. 7. Water trap drain valve- allows the removal of water from the water trap. 8. Back Pressure regulator (BPR) – regulates the pressure in the exhaust umbilical. 9. Metering valve 1 – associated with the diver tracking system. 10.Metering valve 2 – BPR bleed valve associated with the diver tracking system. 11.Flow meter 1. 12.Flow Meter 2 13.Exhaust umbilical isolating valve (Diver 2). 4.1.3 Gas from the diver exhaust umbilical first enters the exhaust manifold. An inward relieving relief valve set to lift at 3.5 bar (50 psi) is provided on the umbilical connection to avoid damage to either the umbilical or the diver equipment if the bell is pressurised with an umbilical and the diver head gear connected. 4.1.4 Gas then passes through a SAECO valve into the water trap. The function of the SAECO valve is to isolate the diver umbilical from the negative pressure automatically in the event of any interruption in the gas supply. 4.1.5 From the water trap, gas passes through a back pressure regulator, the purpose of which is to control the negative pressure in the diver umbilical to the optimum value, giving minimum breathing resistance. Note that this back pressure regulator may be automatically adjusted by the diver tracking system if used to maintain the optimum exhaust pressure as the diver changes depth. Thus, diver depth is sensed by a diver tracking pneumo, which is continuously purged by a slow bleed of gas. In this way, the BPR loader valve can maintain the Back Pressure Regulator at a fixed pressure below diver ambient rather than bell depth. Some helmet exhaust valves do not require the use of the Diver Tracking System. 4.1.6 From the back pressure regulator, gas passes through the hull stops and check valve to the external water trap. Each of these components is described in more detail in the following. 4.1.7 The supply system is completely conventional. The only modification to the existing supply manifold is the addition of a connection required for the diver tracking system and SAECO valve which will be described later. Chap 4 Page 21 of 168 OM002 Rev 5
Page 1 and 2: Rev 5 OPERATING AND MAINTENANCE MAN
Page 3 and 4: March 2009 Approval Sheet DIVEX DOC
Page 5 and 6: March 2009 Table of Contents CHAPTE
Page 7 and 8: March 2009 Disclaimer NOTE Although
Page 9 and 10: March 2009 CHAPTER 1 INTRODUCTION C
Page 11 and 12: March 2009 Fig 1 Layout and Operati
Page 13 and 14: March 2009 setting of the regulator
Page 15 and 16: March 2009 Fig 5 HP Gas System Sche
Page 17 and 18: March 2009 at an early stage such t
Page 19 and 20: March 2009 1.9 Safety and Gas Quali
Page 21 and 22: March 2009 CHAPTER 2 SYSTEM INTERCO
Page 23 and 24: March 2009 Fig 2 Electric Gasmizer
Page 25 and 26: March 2009 CHAPTER 3 DIVER EQUIPMEN
Page 27: March 2009 CHAPTER 4 BELL EQUIPMENT
Page 31 and 32: March 2009 4.2.3 If the diver gas s
Page 33 and 34: March 2009 4.3.4 The negative press
Page 35 and 36: March 2009 accordingly. This is acc
Page 37 and 38: March 2009 4.8 Water Trap Inspectio
Page 39 and 40: March 2009 Fig 6 Pipework Schematic
Page 41 and 42: March 2009 Fig 8 Water Trap Assembl
Page 43 and 44: March 2009 Fig 10 SAECO Valve Assem
Page 45 and 46: March 2009 Fig 12 Outward Relief Va
Page 47 and 48: March 2009 Fig 14 Inward Relief Val
Page 49 and 50: March 2009 Fig 16 Float/Check Valve
Page 51 and 52: March 2009 CHAPTER 5 REPROCESSING U
Page 53 and 54: March 2009 Filters/Moisture Separat
Page 55 and 56: March 2009 range of trace contamina
Page 57 and 58: March 2009 Fig 4 Canister Assembly
Page 59 and 60: March 2009 Fig 6 Back pressure Regu
Page 61 and 62: March 2009 Fig 8 Receiver Adapter A
Page 63 and 64: March 2009 Fig 10 Flow Switch Assem
Page 65 and 66: March 2009 Fig 12 Pressure Regulato
Page 67 and 68: March 2009 CHAPTER 6 CONTROL CONSOL
Page 69 and 70: March 2009 sample is monitored and,
Page 71 and 72: March 2009 6.5 Make-Up Panel 11.The
Page 73 and 74: March 2009 The tools required for c
Page 75 and 76: March 2009 When performing necessar
Page 77 and 78: March 2009 Fig 6 Flow Switch Assemb
Page 79 and 80:
March 2009 Fig 8 RP202 Regulator, P
Page 81 and 82:
March 2009 CHAPTER 7 VOLUME TANK CO
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March 2009 CHAPTER 8 SYSTEM INSTALL
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March 2009 8.2.4 Recommended Umbili
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March 2009 8.4 GASMIZER BELL CARD 8
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March 2009 8.5 GASMIZER BELL CARD -
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March 2009 8.5.4 Shutdown Procedure
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March 2009 8.5.7 Gasmizer Response
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March 2009 PARTIAL PRESSURE OXYGEN
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March 2009 8.6 REGULATOR SETTING GU
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March 2009 8.7 REGULATOR SETTING GU
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March 2009 8.8 System Operation at
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March 2009 Remedy: Diving may be co
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March 2009 CHAPTER 9 GAS BOOSTER CO
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March 2009 Dive Depth (m) Inlet Pre
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March 2009 9.1.4 Main Gas Circuit F
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March 2009 9.2 Booster Starter Cont
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March 2009 Period Every 2000 Hours
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March 2009 Approximate full load cu
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March 2009 Servicing Disassembly: 1
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March 2009 9.9.2 2 nd Stage Cylinde
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March 2009 Guide Ring Axial Thickne
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March 2009 Re-assembly: 1. Assemble
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March 2009 Disassembly: (Having dis
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March 2009 9.11 Relief Valves Maint
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March 2009 Fig 6 K651/454 Compresso
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March 2009 K651/454 Compressor Part
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March 2009 Part No. Description Qty
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March 2009 A.i 4 1/4” Dia Cylinde
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March 2009 A.ii 2 5/8” Dia Cylind
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March 2009 Fig 9 2 5/8” Dia Cylin
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March 2009 Fig 10 Crankcase Assembl
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March 2009 A.v Suction Valve BU6024
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March 2009 A.vii Unloader Valve Ass
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March 2009 Fig 14 Cooler Water Pump
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March 2009 B.i Cooler (After cooler
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March 2009 APPENDIX D - AUXILIARY E
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March 2009 Part No. Description Qty
Page 155 and 156:
March 2009 APPENDIX F - PRESSURE CO
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March 2009 Fig 20 Stage 2 - Relief
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March 2009 Chap 9 Page 151 of 168 O
Page 161 and 162:
March 2009 Dive Depth (m) Pressure
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March 2009 Fig 23 Belt Drive Tensio
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March 2009 168 CHAPTER 10 SPARES LI
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March 2009 168 Part Assembly - C107
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March 2009 168 Part Assembly - C108
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March 2009 168 Part No. Description
Page 173 and 174:
March 2009 168 Post 2004 (Divex Bui
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March 2009 168 VB602 VALVE,BALL, 3/
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