Mann-Tek Cryogenic Breakaway Couplings

Recognizing that pull-away accidents are a major source of environmental risk in the cryogenic fluid transfer industry, Mann-Tek has developed a coupling system with technological advancements to counter this risk.


Mann-Tek Cryogenic Couplings-CB® feature these advantages:

  • Passive security against situations where a hose or loading arm could be subjected to accidental high loads.
  • A simple mechanism without loose components that could be lost after release.
  • Independently operating shut-off safety system that does not require an external power source.
  • Easy on-site reset that requires only one person.
  • Low-pressure drop at hookup.
  • The high flow rate during transfer.
  • Positive shut-off of both coupling halves resulting in minimum product loss
  • Lightweight and robust design
  • Available with ANSI/EN flanges or threaded (female NPT)
  • Manufactured for industrial and marine applications

How Do Cryogenic Breakaway Couplings Work?

For industrial applications, Mann-Tek Cryogenic CBCouplings® can be installed either at fixed points or in the middle of hose strings. They are typically installed into loading arms or hose assemblies where one side of the coupling is attached to a fixed point. Both halves of the coupling contain a valve that is sealed with O-ring seals. When the couplings separate, both valves close quickly, minimizing spillage and protecting personnel and the environment from exposure to cryogenic gases. Release occurs when the tensile pull is applied at an angle up to 90°.

Marine breakaway cryogenic couplers are installed between two strings of hose and are designed to release only by inline pull.

Applications & Specifications

Mann-Tek cryogenic breakaway couplings address specific design challenges for handling liquefied cryogenic gases such as LNG, nitrogen, and other industrial gases. Industrial applications include:

  • Container discharge
  • Fuel bunkering
  • Loading & unloading of tanker trucks, rail tankers & tanker containers
  • Vapor recovery lines
  • Marine applications

Technical data:

  • Coupling Sizes: 1" (DN25) to 6” (DN150)
  • Working temperature: Lowest working temperature: -200° C
  • Materials: Stainless steel. Others are on request.
  • Connections: Female NPT, flanged EN, and ANSI. Others are on request.
  • Certification ISO9001:2008
  • Working pressure
    MWP 25 Bar - 1" (DN25) to 4" (DN100)
    MWP 16 Bar - 6" (DN150)
    with 5X safety factor

Contact Arm-Tex today to learn more about the safety benefits of Mann-Tek Cryogenic Breakaway Couplers—or dial 800.536.1983 to request a product demonstration.