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

1. Helios helmet and head lamp

Elastic and strong, comfortable fit for most adults

This version is recommended for most users.

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

1. Helios helmet and head lamp

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

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

Welding visor

Mouth piece for “sports” conversion

Speech diaphragm

Hard wire communications

Dive gas control manifold

Quick release hoses