Cobham's Naval Subsea and Surface Systems are specifically designed to excel in the extreme and demanding marine environment and meet the most stringent specifications of the US Navy including Level I/SUBSAFE, MIL-S-901 shock and MIL-STD-167-1 vibration requirements. Cobham's extensive portfolio of off-the-shelf equipment, combining Cobham's technology expertise in gas management and pneumatic actuation, has been serving the US Navy for over 30 years.  With this broad experience, Cobham can customise solutions for a variety of surface and subsurface applications.   

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Oxygen and Life Support

Cobham designs and manufactures oxygen life support products such as flow control valves, oxygen regulators, pressure reducing manifolds, and oxygen generator valves.

• The Manual Globe Valve - All U.S. Navy nuclear submarines contain 3000 psi oxygen systems for life support. Cobham supplies a variety of manual valves to control the flow of high-pressure oxygen throughout the system. Cobham's manual valves are used on all U.S. Navy nuclear submarines.
• The High Pressure Oxygen Regulator reduces high pressure inlet oxygen in a range of 200 to 3,000 psig to an outlet pressure of 125 psig.  It is used in primary and emergency life support systems on submarines.
• The 3423 series manifold is an Oxygen Pressure Reducing Station Assembly installed on many U.S. Navy Submarines. This manifold provides integrated control of pressure and flow to a breathing apparatus installed at the outlet port.
• Oxygen Generator Valves - U.S. Navy nuclear submarines use an electrolytic oxygen generator (EOG) to convert water into oxygen and hydrogen gases. Cobham's valves are used to control the flow of water, hydrogen and oxygen through the generator.
• Mechanical Actuators - U.S. Navy nuclear submarines store high-pressure oxygen outside the pressure hull. The high-pressure oxygen is brought into the submarine through a hull penetration tube welded into the bulkhead. Emergency situations sometimes require the oxygen supply to be turned off from remote locations. Cobham's lanyard operated mechanical actuator is mounted on top of the hand valve and is used to remotely shut off the oxygen supply.

Fire Suppression

• Leveraging its expertise in gas management for harsh environments, the Cobham  Halon Time Delay Valve is the standard on U.S. Navy vessels in the halon fire suppression systems. When the fire suppression system is activated a 30 or 60-second delay is required to allow the room to be isolated and for personnel to evacuate. Cobham's halon time delay valve controls the delayed release of halon. 

Environmental control 

Cobham has a long history in supplying the U.S. Navy with a variety of environmental control systems such as solenoid valves, escape trunk regulators, and mechanical shut-off valves that conform to strict military specifications and excel in the extreme and demanding marine environment.

• The Escape Trunk Regulator is used to achieve and maintain hyperbaric pressure in the emergency escape chamber of submarines.  By equalising chamber pressure to that of the surrounding environment, the passenger or crew can acclimatise themselves to a new ambient pressure, allowing them to easily leave or enter the sub at depth.
• Cobham's Latching Solenoid Valve is used on the U.S. Navy Arleigh Burke Class Guided Missile Destroyer Turbine Braking System. When the turbine braking system is activated, the latching valve supplies pneumatic pressure to actuate the braking calipers. Cobham also supplies the turbine braking system pneumatic high pressure regulator.

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