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Diving & Life Support

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Nitrox Membrane Systems

Nitrox membrane systems are based around a special semi-permeable „filter“ called a membrane. The membrane is fed with very clean, low pressure air. The air is separated between oxygen and nitrogen within the membrane leaving a higher percentage of oxygen (> 28 - 40%) in the gas that exits the sides of the membrane, and a higher percentage of nitrogen (> 90 - 99%) exiting the top of the membrane. The capacity of the membrane is the amount of nitrox produced. This is then compressed in a suitable HP compressor, the quantity of nitrox must be higher than the delivery rate of the HP compressor due to some loss within the HP compressor.

1. Mixmaster HP: The Nitrox membrane must be supplied with a clean low pressure air supply; this can either come from a high pressure breathing air storage (in combination with a Mixmaster HP) or from a low pressure air compressor with excellent purification before the membrane (in combination with a Mixmaster LP). Available in Large and Small. The Mixmaster HP panels have an HP breathing air inlet with isolation valve and pressure reducer that safely reduces the HP supply down to the desired LP inlet pressure. The Mixmaster HP panels have a large capacity active charcoal filter to ensure no oil enters the membrane. The HP solution has the advantage of using pure breathing air to feed the membrane; this reduces the risk of membrane contamination.

  • Depth x Width x Height: 300mm x 650mm x 1150mm
  • Weight: 75kg
  • Inlet Pressure: 50 > 350 bar (G 1/4 inch female)
  • Membrane Inlet Pressure LP: 4 > 11 bar (11.5 bar safety valve)
  • Outlet to Compressor (Air/Nitrox): G 1 inch female
  • Air Inlet (for Filling operations): G 1 inch female
     

2. Mixmaster LP: The Nitrox membrane must be supplied with a clean low pressure air supply; this can either come from a high pressure breathing air storage (in combination with a Mixmaster HP) or from a low pressure air compressor with excellent purification before the membrane (in combination with a Mixmaster LP). Available in Large and Small. The Mixmaster LP panels have a LP inlet with coarse and fine coalescent filters and a large capacity active charcoal filter for oil removal. The LP solution is a higher investment but has the advantage of lower running costs compared to the HP version. The LP compressor must be matched to the highest oxygen mixture required. The Mixmaster LP can also be supplied complete with a matched LP compressor for a turnkey installation either complete with a matching HP compressor or just the LP compressor and Mixmaster LP to suit an existing high pressure air compressor that is suitable for Nitrox compression.

  • Depth x Width x Height: 300mm x 650mm x 1150mm
  • Weight: 75kg
  • Inlet Pressure: 4 - 11 bar (G 1/4 inch female)
  • Outlet to Compressor (Air/Nitrox): G 1 inch female
  • Air Inlet (for Filling operations): G 1 inch female
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Nitrox membrane systems are based around a special semi-permeable „filter“ called a membrane. The membrane is fed with very clean, low pressure air. The air is separated between oxygen and nitrogen within the membrane leaving a higher percentage of oxygen (> 28 - 40%) in the gas that exits the sides of the membrane, and a higher percentage of nitrogen (> 90 - 99%) exiting the top of the membrane. The capacity of the membrane is the amount of nitrox produced. This is then compressed in a suitable HP compressor, the quantity of nitrox must be higher than the delivery rate of the HP compressor due to some loss within the HP compressor.

1. Mixmaster HP: The Nitrox membrane must be supplied with a clean low pressure air supply; this can either come from a high pressure breathing air storage (in combination with a Mixmaster HP) or from a low pressure air compressor with excellent purification before the membrane (in combination with a Mixmaster LP). Available in Large and Small. The Mixmaster HP panels have an HP breathing air inlet with isolation valve and pressure reducer that safely reduces the HP supply down to the desired LP inlet pressure. The Mixmaster HP panels have a large capacity active charcoal filter to ensure no oil enters the membrane. The HP solution has the advantage of using pure breathing air to feed the membrane; this reduces the risk of membrane contamination.

  • Depth x Width x Height: 300mm x 650mm x 1150mm
  • Weight: 75kg
  • Inlet Pressure: 50 > 350 bar (G 1/4 inch female)
  • Membrane Inlet Pressure LP: 4 > 11 bar (11.5 bar safety valve)
  • Outlet to Compressor (Air/Nitrox): G 1 inch female
  • Air Inlet (for Filling operations): G 1 inch female
     

2. Mixmaster LP: The Nitrox membrane must be supplied with a clean low pressure air supply; this can either come from a high pressure breathing air storage (in combination with a Mixmaster HP) or from a low pressure air compressor with excellent purification before the membrane (in combination with a Mixmaster LP). Available in Large and Small. The Mixmaster LP panels have a LP inlet with coarse and fine coalescent filters and a large capacity active charcoal filter for oil removal. The LP solution is a higher investment but has the advantage of lower running costs compared to the HP version. The LP compressor must be matched to the highest oxygen mixture required. The Mixmaster LP can also be supplied complete with a matched LP compressor for a turnkey installation either complete with a matching HP compressor or just the LP compressor and Mixmaster LP to suit an existing high pressure air compressor that is suitable for Nitrox compression.

  • Depth x Width x Height: 300mm x 650mm x 1150mm
  • Weight: 75kg
  • Inlet Pressure: 4 - 11 bar (G 1/4 inch female)
  • Outlet to Compressor (Air/Nitrox): G 1 inch female
  • Air Inlet (for Filling operations): G 1 inch female
Read More
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