In liquefied natural gas (LNG) applications, valves can regularly encounter temperatures below -320 F (-196 C) and pressures above 750 pounds per square inch (psi). The equipment faces constant thermal cycling, conventional seals risk failure, leading to dangerous leaks and operational shutdowns. Lip seals excel in these extremes by maintaining elasticity and sealing integrity even under cryogenic conditions. Their unique design creates a dynamic barrier that adjusts to pressure fluctuations and shaft misalignment—common challenges in LNG pumps, valves, and transfer systems. For operators, this translates to reliable cryogenic sealing that prevents fugitive emissions and ensures process safety.

The superiority of lip seals in LNG environments stems from advanced material engineering.

Sealing success factors:

To provide superior protection against leakage in cryogenic valves for LNG, seals should have:

1. Jacket material that tolerates thermal cycling

2. An energizer to compensate for shrinkage

3. Anti-extrusion lip geometry

Beyond material resilience, lip seals offer zero-leakage performance critical for meeting stringent environmental and safety standards in LNG facilities. Their design prevents gas escape during thermal contraction/expansion cycles—a key failure point for static seals. This is vital for applications like LNG loading arms, cryogenic valves, and storage tank penetrations, where even minor leaks can escalate into safety hazards or regulatory violations.

For LNG operators seeking to minimize downtime and lifecycle costs, our custom-engineered lip seals provide a robust solution. We tailor seal profiles, materials, and spring reinforcements to specific operational pressures, shaft speeds, and fluid compatibilities. By partnering with us, you gain access to sealing technology proven to enhance safety, reduce methane emissions, and extend maintenance intervals in the world’s most demanding cryogenic environments.