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Two rebreather valve models for CCR cylinder configurations — Air and Nitrox variants, available in multiple connection formats. Both are designed for high-cycle use in closed-circuit rebreather systems where diluent and oxygen cylinders require dedicated valves matched to gas service and connection standard.
Rebreather Cylinder Valves
Closed-circuit rebreathers (CCRs) use dedicated small cylinders for the diluent gas (typically air or a Nitrox mix) and the oxygen supply. These cylinders require valves specifically designed for CCR integration — with connection formats matched to the scrubber head, solenoid, and manual addition valve interfaces of the specific rebreather unit, and with oxygen-compatible materials and cleaning for the O₂ cylinder.
The Rebreather valve for Air (45–48 €, SKU 746500/2/4) is for the diluent cylinder in air or non-O₂-enriched configurations. Three SKU variants correspond to different connection formats — check the product page for the specific 5/8″ or alternative connection options and confirm compatibility with your rebreather unit before ordering.
The Rebreather valve for Nitrox (56–59 €, SKU 746506/8/10) is oxygen-cleaned and compatible for use with Nitrox diluents above 23.5% O₂ or oxygen cylinders. Three connection variants are available. The price premium over the air version reflects the oxygen-cleaning and compatible-material construction required for high-O₂ service.
What to Look For
- CCR unit compatibility: Rebreather valves are not universally interchangeable — the connection format and thread must match the specific ports on your CCR unit. Confirm the required connection standard (typically M18×1.5 or G 5/8″ DIN) with your rebreather manufacturer documentation before ordering.
- Gas service: If the cylinder will be filled with oxygen or Nitrox above 40% O₂ at any point, the Nitrox variant (oxygen-cleaned) is required. The Air valve is not rated for oxygen service.
- SKU variant selection: The /2/4 and /6/8/10 suffix ranges indicate multiple connection format variants within each model. Each suffix corresponds to a specific port configuration. Check the product page for the current variant listing and match to your rebreather specification.
FAQ
Can I use a standard DIN valve on a rebreather cylinder?
A standard open-circuit DIN valve can physically connect to a DIN regulator first stage, but CCR cylinders often require specific valve geometries for integration with the rebreather head, ADV (automatic diluent valve), or manual addition valve. Using an incorrect valve type may prevent proper CCR integration or create a configuration that does not meet the rebreather manufacturer’s specifications. Use valves specified or approved for your specific CCR unit.
How often should rebreather valves be serviced?
CCR valves are subject to high cycle counts — they are opened and closed frequently relative to open-circuit valves. Service intervals depend on the rebreather manufacturer’s recommendations and the frequency of diving. For oxygen service valves, oxygen cleaning has a limited validity (typically 12–15 months) and must be renewed if the valve has been exposed to hydrocarbons or contamination. Follow the rebreather manufacturer’s maintenance schedule rather than applying generic open-circuit service intervals.