Electric Gasmizer

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JFD's Divex Gasmizer diver gas recovery system is the world’s most popular helium gas reclaim system with over 6,000,000 safe diving hours operation.

Comprising of four main robust components, the Gasmizer will reclaim gas from two divers from 500 metres (1650 feet). The purpose of the Gasmizer diver gas recovery system is to recover gas mixtures breathed by divers, re-process it and then redeliver it in to the supply system.

The gas is removed from the helmet as it 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.

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. As the major components are topside, it has been possible to design the system such that it may be serviced while a dive continues.

In addition to recovering divers gas, the system may be used to recycle bell gas thus reducing gas loss due to bell flushing.

The system has several levels of safety back-up. A conventional demand system is used and by means of a single action, open or closed circuit operation may be selected. Similarly, the conventional emergency bail-out system is available.

Electric Gasmizer Electric Gasmizer Electric Gasmizer and gasbag Gasmizer equipment layout Gasmizer BPR in diving bell BPR loader Reprocessing units Volume tank

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Electric Gasmizer 1 - Prod.jpg

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Electric Gasmizer 2 - Prod.jpg

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Gasmizer and Gasbag - Prod.jpg

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Equipment Layout - Prod.jpg

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Gasmizer BPR in Bell - Prod.jpg

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BPR Loader - Prod.jpg

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Reprocessing Units - Prod.jpg

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Volume Tank - Prod.JPG

Exhaled gas is recovered from the divers by means of reclaim valves, mounted on helmets. The exhaust umbilicals are connected via SAECO valves (Supply Actuated Exhaust Cut-Off Valves) situated in the bell. Gas then passes via a water trap in to a back pressure regulator, which controls the pressure in the exhaust umbilical. The bellman can monitor this pressure on a gauge situated in the bell. Gas is then passed to the surface via a non-return valve and a second water trap.

On the surface, the gas enters the reprocessing unit where oxygen is made up to the correct mix. The gas is then passed to an electric gas booster where the pressure is increased prior to returning to the reprocessing unit. It is then scrubbed to remove CO2 and other impurities before being passed to the volume tank for storage and eventual re-supply to the conventional gas supply system. This gas is passed via a bell umbilical to the bell gas supply manifold and then to the diver’s demand regulator.

The addition of an optional second gas booster will allow 100% redundancy enabling continued operation during maintenance. Similarly two scrubber canisters are provided, either of which can be replenished while a dive continues.

During normal operations the oxygen used by divers is replaced by a metered oxygen flow into the system. This oxygen flow together with all other aspects of system operation may be monitored by the dive supervisor at the control console. In the event of interruption of the gas supply from the reprocessing unit the supervisor is immediately informed by means of an indicator. The divers’ gas supply is maintained from the heliox gas bank via regulators first on the make-up panel and subsequently on the bell gas supply console.

  1. The system may be broken down into the following sections:
  2. Diver equipment
  3. Bell exhaust equipment
  4. Reprocessing unit
  5. Electric gas booster
  6. Gas storage and supply
  7. Control console
   

Depth rating

Min. 30msw (100fsw), max. 500msw (1,650fsw)

Excursions below bell

0 - 30msw (0 - 100fsw)

Excursions above bell

0 - 20msw (0 - 66fsw)

Efficiency rating

90% or more

Control console (B1571)

Width

20.5" (520mm)

Depth

8.5" (215mm)

Height

31.9" (810mm)

Weight

44lbs (20kgs)

Power supply

50/60 Hz 220v 1ph

Bell equipment 2 diver (B1496A)

Internal - weight

15.5kg (34lbs)

Working pressure

-40 +20msw

External - weight

6.4kg (36lbs)

Internal pressure

69 bar (1,000 psi)

External pressure

69 bar (1,000 psi)

Bulkhead mounter reprocessing unit LP section (B15730)

LP section

Width

1410mm (4.6ft)

Depth

351mm (1.2ft)

Height

1445mm (4.7ft)

Weight

160kg (353lbs)

Max. working pressure

69 bar (1000 psi)

Bulkhead mounter reprocessing unit HP section (B15730)

Width

940mm (3.1ft)

Depth

265mm (0.8ft)

Height

1495mm (4.9ft)

Weight

100kg (220lbs)

Max. working pressure

103 bar (1500 psi)

Water supply (salt or fresh water)

9 lpm (2 gpm)

Water temperature

1o to 7oC (34o to 45oF)

Electric gas booster (B10510AA)

Width

1610mm (5.3ft)

Depth

1092mm (3.6ft)

Height

1687mm (5.5ft)

Weight

1450kg (3200lbs)

Power supply

380 - 460V 3 ph 50/60 Hz 37kW

Sea water supply

72 lpm (16gpm)

Capacity at dive depth

150 alpm (5.3 acfm)

Max. discharge pressure

100 Bar (1450 psi)

*Volume tank - 10 bottle (GR2297AA)

Width

4.3ft (1290mm)

Depth

2.0ft (600mm)

Height

6.6ft (2000mm)

Weight

1717 lbs (780 kgs)

Water volume

500 lts (18.1 ft3)

Max working pressure

103 bar (1500 psi)

*Volume Tank not included in A10621

Item Order Code

Electric Gasmizer diver gas recovery system 440/480V 60Hz

A10621

Electic gas booster 50HP 440/480V 60Hz

B10510AA

Electric Gasmizer control console

B1571

Bulkhead reprocessing unit

B15730

Gasmizer 2 diver bell equipment

B1496A

Volume tank assembly 10 bottle pack

GR2297AA

Document Document type Download
Electric Gasmizer diver gas recovery system Datasheet

P1805-MDS-558 R1

Electric Gasmizer diver gas recovery system (Part number: A10621) Operation and maintenance

P1805-OM-307 R10

Electric Gasmizer, schematic Drawing

P1805906S1 R1

Bell equipment, internal, general assembly Drawing

81491S1 R3

Bell equipment, pipework schematic (2 diver) Drawing

B81496S1 R7

Bell equipment, process and instrumentation diagram, 2 diver, Gasmizer Drawing

P1805901S1 R0

Control console, Gasmizer Drawing

B81571S1 R13

Electric gas booster, 50HP, 415/440V 60Hz, general arrangement Drawing

B105101S1 R1

Booster interface information Drawing

IFD1001006S1 R2

LP gas system schematic Drawing

P180524S1 R8

HP gas system schematic Drawing P180525S1 R20
LP gas system, reprocessing unit, process and instrumentation diagram, Gasmizer Drawing P1805902S1 R2
HP gas system, reprocessing unit, process and instrumentation diagram, Gasmizer Drawing P1805903S1 R5
Pipework schematic 10 bottle pack Drawing

P1805265S1 R11

Volume tank, interface information, Gasmizer Drawing

IFD1001007S1 R2

Volume tank, 10 bottle pack, process and instrumentation diagram, Gasmizer Drawing P1805906S1 R1

 

 

The air driven and electric Gasmizer servicing course has been designed to provide candidates with the skills and knowledge required to correctly operate, maintain and service the Gasmizer diver gas recovery system.

Air driven Gasmizer servicing course duration: 3 days
Electric Gasmizer servicing course duration: 3 days

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