NTS®-SZ-TT: Emergency Disconnect Safety System with Cable Pull for Cryogenic Temperature Range to -230°C (-382°F)
The NTS®-SZ-TT is a cable-release Safety Breakaway Coupling designed for transporting media at extremely low temperatures. In hazardous situations, the coupling separates safely and without damage. It can then be quickly and easily reassembled. Its maximum activation range is 360°, and the trigger mechanism operates independently of the system pressure.
The cryogenic Safety Breakaway Coupling is recommended for transporting LNG, LOX and other liquid or gaseous media at temperatures down to -230°C (-382°F).
Hazardous situations during refueling operations often arise due to unintentional tensile forces acting on the line. This can occur for various reasons, such as the sudden departure of a tanker connected to the coupling. Therefore, it is recommended to equip the line with an NTS Safety Breakaway Coupling from ARTA.
If an unintentional tensile force acts on the release cable of the NTS®-SZ-TT, the two coupling halves separate in a controlled manner and their valves immediately close on both sides. This prevents the release of potentially hazardous media and ensures the safety of the user.
The NTS®-SZ-TT enables the loading and transfer of liquids and gases at temperatures down to -230°C (-382°F). Even when covered in ice, the NTS®-SZ-TT remains fully functional, making it ideally suited for cryogenic applications.
The design of the NTS®-SZ-TT ensures direct and safe separation. No coupling components are destroyed, ensuring a long service life. Furthermore, the separation mechanism allows the transported medium to remain securely contained in both coupling halves without spillage. This protects the environment and eliminates additional material costs.
Since separation is non-destructive, the Safety Breakaway Coupling can be reassembled quickly and easily, minimizing downtime. No spare parts or special tools are required for reassembly. A simple device is used to pull the two separated coupling halves back together.
The flow-optimized design of the NTS®-SZ-TT was developed using the Finite Element Method (FEM) and validated through flow testing. This minimizes pressure loss and enables the breakaway coupling to achieve maximum flow capacity.
The optimized release mechanism prevents the transmission of tensile forces between the vehicle, the NTS and the system. This ensures safe separation even under adverse conditions. The fully flexible 360° activation range allows separation regardless of the direction from which tensile force is applied to the system. The high-performance trigger mechanism of the NTS®-SZ-TT is designed to operate independently of line pressure.
The NTS®-SZ-TT is a globally recognized safety coupling that has been certified by internationally recognized certification bodies. It is therefore suitable for use in a wide range of safety-critical applications.
The NTS®-SZ-TT is particularly suitable for transporting media at extremely low temperatures, including liquefied natural gas (LNG), liquid oxygen (LOX), ethylene, propylene and ethane. It can be used in suction and discharge lines for liquid and gaseous substances, making it particularly suitable for tanker trucks, tanker ships and loading stations.
Due to its application in the cryogenic sector, it is ideally combined with the ARTA ASK-TT Dry Break Coupling.
 Liquids |
 Gases |
 Cryogenic |