Low temperature cryogenic seals are widely used in LNG Compressors, Cryogenic Valve, LNG Fueling Systems. Sealing cryogenics is a balancing act of many factors such as spring force, surface finish, friction and allowable leakage.

The ball valve is simple in structure, small in installation space, and sealed by medium force, not affected by external driving force, so it is widely used in various working conditions. At present, ultra cryogenic ball valves are widely used in LNG terminals, and the number of ultra cryogenic ball valves accounts for 80% of the total number of valves in LNG terminals.

In JST, we would recommend TMF as jacket material, and Golden Elgiloy Helical Spring as energizer. When considering the pressures that may be sealed, backup rings also become necessary if the cross sections become too narrow. As a good workaround, these cross sections can be designed with a spring that forces the seal in conformance with the hardware. With the right material formulation and design, they can actually provide much better sealing service than alternative technologies.

The advantages of JST LNG Cryogenic Valve Seals include:

1. Material compound passed API 6A FF/HH Immersion Testing;

2. Passed BS6364 test(-196℃);

3. High load helical wound spring with small deflection range;

4. Rigid spring acts as a energizer to resist low-temperature shrinkage;

5. NACE-approved energizers available for oil and gas use;

6. One-way or two-way design is available;

7. With single spring or double spring design;

Contact us for designs and quotations: jstgz@jst-seals.com