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Kirby Morgan 37NS 500-051NS-455 Commercial Diving Helmet with Waterproof Connectors and 455 Balanced Regulator

SKU: 500-051NS-455 Rate this product

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    Availability: Usually ships 1 weeks after receipt of order

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    • Reseller Restriction
      Due to vendor restrictions, this item cannot be sold to a reseller. If you are a reseller, please call us at 760-208-6500 or email for more details.

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    • 455 Balanced Regulator - Is a downstream balanced poppet design. The 455 Balanced has a multi turn bias adjustment allowing the diver to compensate for variations in supply pressure and changes in physical attitude. The regulator body is made of 316 stainless steel, as are all its other metal components
    • Air Train - The air train diffuses incoming breathing air/gas onto the face port/lens to defog and ventilate.
    • Defogging Steady Flow Valve - Provides an additional flow of gas into the helmet for ventilation and defogging.
    • Emergency (EGS) Valve - Supplies backup breathing gas to the diver.
    • Fiberglass and Carbon Fiber Reinforced Shell - Kirby Morgan® has over 50 years experience in composite laminations. The helmet shell is hand laid up glass fiber reinforced thermal setting polyester (fiberglass) with carbon fiber reinforcement at key points for added durability. It is light and highly impact resistant, and provides a heat/cold barrier as well as being an excellent electrical nonconductor.
    • Gas Supply Non-Return Valve - Commercial Rated™, It prevents loss of gas pressure in the event of umbilical damage.
    • Nose Block Device - Allows the diver to block the nose to equalize ears.
    • Rapid Change Modular Communications Systems - Because the module is easily removed the helmet, repair or replacement of communications parts is quick and trouble free. It is available with either a male waterproof connector or a bare wire post connection.
    • Side & Top Weights - Brings unsurpassed balance to the helmet while providing for accessory mounting areas.
    • Side Block - Multi use side block has additional ports built in to provide controlled air flow, if needed.
    • Silicone Oral Nasal Mask - Made of a superior silicone material which is hypo-allergenic and has a longer work life than latex.
    • Whisker Wings - Bubble deflecting Whisker wings keep bubbles further from face port and ears, improving visibility and decreasing internal noise.
    • Side and Top Weights - Bring unsurpassed balance to the commercial diving helmet while providing for accessory mounting areas.
    • Positive-Lock™ Latch System - Developed by Kirby Morgan in 1992, consists of two sealed Positive-Lock pull pins which are pulled forward to release the neck collar and neck dam locking system. Even when the latches are released, the O-ring sealed neck dam maintains a positive seal and will not allow the seal to be broken until the collar actually clears the commercial diver's shoulders, thus helping to prevent any flooding of the commercial diving helmet.
    • Head Cushion - Gives the commercial diving helmet a secure, well balanced feel as well as excellent thermal protection during long work periods.
    • Quad-Valve Exhaust System - Makes the commercial diving helmet very dry with no loss of breathing performance.
    • Internal Adjustable Chin Strap - Along with the adjustable neck pad on the locking collar gives the commercial diver a comfortable, secure fit.
    • Adjustable Neck Pad - Is made from a scuff resistant elastomer which is attached to the yoke system. In conjunction with the spring activated front neck dam ring lock, it provides protection for the bottom of the Kirby Morgan Commercial Diving Helmet.


    The Kirby Morgan 37 commercial diving helmet has been tested and conforms to the performance requirements as set forth in Annex II of Directive 89/686/EEC and, as far as applicable, the EN 250:2000, EN 250/A1:2006 and EN 15333-1:2008 (class B). It is fully CE marked with demand 455 regulator and oral nasals P/N 510-690 and P/N 510-747.

    • Weight: 32.6 lbs.
    • Helmet shell: Fiberglass, polyester resin, polyester gel coat, and carbon fibers
    • Control knobs: Polyurathane
    • Lens: Clear polycarbonate
    • Neck dam: Neoprene
    • O-Rings: Buna-N
    • Head cushion: Nylon bag filled with #4 Polyester foam
    • Recommended Lubricants: All commercial diving helmets and band 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 commercial diving helmet and band mask components that are used with gas mixtures containing less than 50% oxygen.
    • 455 Balanced Regulator - The Kirby Morgan 455 Balanced Regulator body is made of 316 stainless steel, as are all its other metal components. The 455 Balanced regulator is designed and engineered to be rugged, long lasting and easy to disassemble for simple, fast, cleaning and servicing.The 455 Balanced regulator meets all requirements of European standard EN15333-1 and is CE approved and CR rated.
    • Cage Code: The cage code for identifying Kirby Morgan DSI products for U.S. government purposes is 58366.
    • Cage Code:The cage code for identifying Kirby Morgan DSI products for U.S. government purposes is 58366.
    • CR Standards: Kirby Morgan commercial diving helmets meet or exceed all standards established by Dive Lab of Panama City, Florida, and are CR (Commercially Rated) marked.
    • CE Approved: The Kirby Morgan 37 Commercial Diving Helmet is CE Approved.
    • Temperature limitations: Use at water temperatures below 33°F (1°C) requires use of Kirby Morgan Hot Water Shroud (Part #525-100) and hot water.

    Kirby Morgan 37NS Commercial Diving Helmet with Waterproof Connectors and 455 Regulator - P/N: 500-051NS Includes:

    • (1) Tool Pouch - P/N: 525-613
    • (1) Socket Wrench, Regulator Mount Nut - P/N: 525-625
    • (1) Manual KM37 - P/N: 100-073
    • (1) Logbook with Pen - P/N: 125-001
    • (1) Helmet/Mask Bag - P/N: 500-901


    The Kirby Morgan Hot Water Shroud (Part #525-100) in conjunction with hot water to the commercial diver should be used whenever commercial diving operations are conducted using HEO2 at water temperatures less than 60°F (15.56°C) for the comfort of the commercial diver. Kirby Morgan DSI further recommends that the hot water shroud be used in conjunction with hot water to the commercial diver whenever commercial diving operations are conducted using air or mixed gas, in waters colder than 36°F (2.22°C) to reduce the possibility of demand regulator icing.

    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 divers exhalation coming in contact with the topside air temperature.

    If diving where the water temperature is 36°F (2.22°C) or warmer but the topside air temperature is below freezing, (32°F (0°C) icing of the demand regulator is possible. To help eliminate the possibility of freezing on the surface, warm water should be run over the exterior of the demand regulator prior to water entry, if the hot water system is not used.

    Only equipment certified and tested according to EN 250/E DIN 58 642 may be used with the Kirby Morgan 37 commercial diving helmet when conducting commercial diving operations in European EC compliant countries.

    The commercial diver's umbilical assembly should be composed of good quality diving hose that meets industry standards. Generally, gas hose will be married to the communications wire, pneumofathometer hose, and strength member in a manner that will allow the strength member to receive all the strain. There are also good quality umbilicals available that are assembled at the factory using a twisted method which does not require marrying. Regardless of the system used, the commercial diver's umbilical is the commercial diver’s life line and should always be of excellent quality and maintained carefully.


    The Kirby Morgan 37NS Commercial Diving Helmet with Male Waterproof Connectors and 455 Balanced Regulator continues with a long tradition of providing the highest quality, and superior performance for commercial diving helmets. The Kirby Morgan 37 Helmet is very similar to the Kirby Morgan SuperLite® 27 Commercial Diver's Helmet, but it has a larger shell and includes the new Kirby Morgan Quad Valve™ Exhaust System. This new Exhaust System, which retrofits most previous Kirby Morgan Commercial Diving Helmets, has less breathing resistance than the older single valve exhaust while providing an extremely dry commercial diving hat. The system is recommended for commercial diving in biologically contaminated water. Kirby Morgan's 455 regulator is a proven design that provides excellent breathing characteristics over a wide range of depths.

    The Kirby Morgan 37 is one of the most popular designs in the commercial diving world. It's considered the standard of the commercial diving industry. Choose the KM 37 if you want a rugged commercial diving helmet with a traditional design.

    Warning: Before attempting any diving in any type of contaminated water, a complete commercial diving and topside course in hazardous materials emergencies should be completed. The commercial divers and the topside team must be properly trained and have the proper safety equipment. All commercial diving helmets and suits can leak water under certain conditions. Commercial divers should use extreme caution when diving in contaminated waters.

    * Please reference the Accessories and Parts categories in the left hand column for all accessories and parts associated with the Kirby Morgan 37NS Commercial Diving Helmet with Male Waterproof Connectors. Click on the KM37 and then the KM37NS with MWC category and the Accessories and Parts categories will appear beneath it.

    * For Questions on Kirby Morgan Helmet Retaining Systems, please refer to the bulletin in Attachments tab which contains more detailed information.

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