The fully tested and certified KMB 18B & 28B Band Masks may be used in mixed gas diving as well as shallow water diving.
The SuperFlow® adjustable demand regulators provide low inhalation resistance and high gas flow letting the diver breathe easier and work harder with less exertion. Both masks come standard with the large tube SuperFlow® 350 regulator.
The Side Block Assembly of both the KMB 18 and 28 receives the umbilical over the shoulder in the B configuration. They both come standard with the Tri-Valve™ exhaust system (Patents Pending), and the new patent pending Band Mask® Band Keepers™.
The Tri-Valve™ Exhaust System (Patents Pending) has less breathing resistance than the older single valve exhaust. It retrofits to all previous Kirby Morgan Band Masks®. The new patent pending Band Mask® Band Keepers™ coupled with the redesigned hood not only prevent any separation of the hood from the mask but also makes it impossible for the bands to separate from the mask.
The communications connections can be either a male waterproof plug in type or bare wire posts. The KMB 28B Band Mask is very similar to the KMB 18. Many parts on the KMB 18B are interchangeable with the KMB 28B. The major difference between the 18 and 28 is the material of the mask frame itself. The KMB 18 has a hand laid fiberglass frame (yellow) while the KMB 28B frame is an extremely durable injection molded plastic (black). The relative ease of production of the KMB 28 frame allows for a lower cost and quicker delivery of this mask. Other differences include: 1) The main exhaust body of the KMB 28 is part of the frame itself and uses a DSI 545-041 main exhaust cover 2) no comfort insert is required on the KMB 28 3) the face ports for the 18 and the 28 differ slightly in size.
Head Harness (Spider): Keeps the mask in place on the diver’s head. The neoprene rubber spider has adjustment holes for varying the tension of the harness.
Hood/Face Seal: Provides the diver with a comfortable thermal barrier around his head as well as pockets for earphones.
Defogging Steady Flow Valve: Provides an additional flow of gas into the mask for ventilation and defogging.
Emergency (EGS) Valve: Supplies backup breathing gas to the diver.
Gas Supply Non-Return Valve: Prevents loss of gas pressure in the event of umbilical damage, preventing a “squeeze”.
Communications: Communications are “non-modular.” When ordered with male waterproof connector (for 4 wire communications) the mask also includes bare wire posts. When ordered with bare wire posts (for 2 wire communications) the port for the mwp connector is plugged.
Tri-Valve® Exhaust with Whisker Wings: Retrofits to many previous Kirby Morgan Helmets and Band Masks®, has less breathing resistance than the older single valve exhaust while providing an extremely dry hat. The Tri-Valve™ Exhaust is made of a chemical resistant compound.
Water Exhaust: Automatically keeps water drained from the mask.
SuperFlow® 350 Regulator: This all metal, fully adjustable, Commercial Rated demand regulator provides easy breathing and excellent performance with low pressure compressors.
Nose Block Device: Allows the diver to block the nose to equalize ears.
Silicone Oral Nasal Mask: Made of a superior silicone material which is hypo-allergenic and has a longer work life than latex.
Mask Frame: Hand laid fiberglass for the KMB 18, injection molded plastic for the KMB 28.
Air Train: The air train diffuses incoming breathing air/gas onto the face port/lens to defog and ventilate.
Side Block: Multi-use side block has additional ports built in to provide controlled air flow, if needed.
Weight: KMB 18-13.63 pounds, KMB 28-12.73 pounds
Mask Frame: KMB 18-Fiberglass, polyester resin, polyester gel coat, and carbon fibers, KMB 28-Xenoy thermoplastic
Control Knobs: Polyurathane
Face Port/Lens: Scratch Resistant Polycarbonate
Recommended Lubricants: Christo-Lube®, Dow Corning® MS4 Silicone Lubricant. Krytox® and Halocarbon® are also acceptable.
SuperFlow® 350 Performance: The SuperFlow® 350 regulator on the KMB 18 & 28 offers high performance. The regulator has been tested at Dive Lab at Panama City, Florida. It meets 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: These helmets meet or exceeds all standards established by Dive Lab of Panama City, Florida, and are CR (Commercially Rated) marked.
CE Approved: Both the KMB 18 & 28 are CE Approved.
Temperature Limitations: Use at water temperatures below 33°F (1°C) requires use of hot water shroud (P/N DSI 525-100) and hot water.
Operational Specifications & Limitations: Umbilical minimum ID 3/8” (9.5 mm) of not more than two sections, total length not to exceed 600 feet (183 m). These masks meets or exceeds all requirements of NPD, Health and Safety, (U.K.), United States Navy, ADCI United States and is CR rated by Dive Lab, Panama City, Fla., USA. Recommended overbottom (OB) gas supply pressure for best performance at depths are calculated by the formula (FSW x 0.445 + 14.7) + recommended PSIG.