This item may be fitted by competent users, as defined in BS4275: 1974 (replaced by BS EN 529: 2005, presently under review) .
It is tested compliant with the relevant provisions of EN 250 and EN 136, for robustness and duty. It does not include the visor and frame assembly.
Mask body, fitted with five buckles and demand, or breathing valve manifold to Interspiro Specifications.
Scott/Kemira branded, othwerwise exactly similar to Interspiro's, the product and its tooling was was jointly developed with Kemira, in 1981.
It is made in grey rubber compound, mixed from SBR, natural and Neoprene rubbers and designed for general use in Diving SCUBA, industrial respirators and Firefighting BA.
Natural/Neoprene/Styrene Butadiene, mixed compound, is much stonger, more elastic and more comfortable than Silcone rubbers
MASK COLOUR : GREY
Note that new, mask rubber components and new masks are coated with a thin layer of mould release wax, which also inhibits surface staining and oxidisation in storage.
You may therfore see some residues, when unpacking. These may be wiped or washed off, prior to use, if desired. They are not harmful and contain no dermititic agents or solvents.
Divator: Specifications for 'AGA' mask and Demand Valve
Assembly detail: |
Options |
Special features |
Test Protocol |
Notes: |
Mask Assembly: Low volume optically correct visor, plastic parts are glass filled nylon 12; mask made from Grey, Natural, SBR and Neoprene rubber compound |
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Elastic and strong, comfortable fit for most adults This version is recommended for most users.
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EN136 |
A variety of hose options are available but the mask and demand valve assembly does not come with a supply hose in the price. |
Mask Assembly: As above but outer & inner mask is made from Yellow silicone rubber compound |
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Resistant to perishing but not as strong as the grey mask |
EN136 |
As above. All metal components of the mask are 316 stainless and nickel or chrome finished Brass 121. |
Inner Mask |
Fitted to all full-face masks |
Reduces re-breathing of Carbon dioxide to lower than ½% Volume |
EN136 |
Hypoallergenic rubber |
Demand Valve Assembly Automatic compensation for supply gas pressure changes and ambient pressure. |
Standard pressure. Valve responds at ambient pressure minus 5-mm water gauge. This unit can be fitted with “off” switch; useful if the valve is used as a spare |
Fully balanced downstream valve with built in pressure relief and safety purge design. Work of Breathing less than 1 Joule/litre, response time less than 30 milliseconds |
EN250* |
Plastic parts are glass filled nylon 12; metal components of the mask nickel or chrome finished Brass 121. |
Demand Valve Assembly Automatic compensation for supply gas pressure changes and ambient pressure. |
Positive pressure valve |
As for standard valve but external pollution is kept out of the mask and the lungs increase gaseous exchange area, achieving better gas perfusion. |
EN250 |
As above |
Suitable Air supply via ¼” id. supply hose |
>1000 Litres per minute at a dynamic pressure exceeding 6.5 Bar |
This will be achieved with any Pressure Reducer meeting EN250. The Divator reducer unit is ideally suited. |
E250 |
Measured at unopposed 3/8” unf, reducer port at ambient pressure of 1 Bar. |
What is standard? |
Mask and front port plate. Instruction manual |
Demand Valve, balanced pressure type |
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Suitable for use with oxygen up to 20 Bar |
What is extra, which might be desirable? |
Prescription glasses and fitting kit |
Buddy phone communications |
Supply hose |
Diving with a buddy who is also equipped with the World’s best demand valve |
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Welding visor |
Mouth piece for “sports” conversion |
Speech diaphragm |
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Hard wire communications |
Dive gas control manifold |
Quick release hoses |
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