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Features the all stainless steel REX regulator, as well as a stainless sideblock, helmet ring, handle, and other key components.

The REX® Exhaust System is standard on this helmet. The advanced regulator pod on this helmet allows it to be outfitted with other Kirby Morgan regulators, including the SuperFlow® 350 or the all stainless steel 455 balanced regulator.

Specifications

Weight:
KM 77 – 32.43 pounds

Helmet Shell:
Stainless Steel

Control Knobs:
Polyurethane

Face Port/Lens:
Scratch Resistant Polycarbonate

Neck Dam:
Neoprene. Optional latex neck dam available

O-rings:
Buna-N

Head Cushion:
Nylon bag filled with #4 Polyester foam

Recommended Lubricants:
All helmets and masks are lubricated at the factory with Christo-Lube®. Kirby Morgan recommends Christo-Lube® or Tribolube® for all gas train components. Dow Corning® 111 Silicone or equivalent may be used for helmet and mask components that are used with gas mixtures containing less than 50% oxygen.

Regulator:
The Rex® regulator on the Kirby Morgan® 77 offers high performance. The regulator has been tested at Dive Lab at Panama City, Florida. It meets or exceeds all current U.S. Navy and European diving standards.

Cage Code:
The cage code for identifying KMDSI products for U.S. government purposes is 58366.

CR Standards:
This helmet meets or exceeds all standards established by Dive Lab of Panama City, Florida, and are CR (Commercially Rated) marked.

Note
The minimum operating temperature recommended for this helmet is 37 degrees F, only in regards to regulator performance. At the time of this writing, no hot water shroud is available for this helmet for heating the diver’s breathing gas.

Without a hot water shroud, the diver may be subject to hypothermia due to cold gas inspiration temperatures. Kirby Morgan makes no physiological recommendations regarding minimum safe operating temperatures for divers using this helmet.

Usually the greatest danger of demand regulator icing will be encountered on deck when the surrounding air temperature is less than 32°F (0°C). This effect is primarily due to the refrigeration effect of breathing air pressure reduction, and the addition of moisture from the diver’s exhalation coming in contact with the topside air temperature.

Recommended overbottom (OB)gas supply pressure for best performance at depths are calculated by the formula (fsw x 0.445+14.7) + recommended p.s.i. g.