In LNG cryogenic service, sealing performance is governed by long-term stability rather than material strength.
At -196°C, thermal contraction, elasticity loss, and interface variation continuously alter sealing conditions, making consistency the key challenge rather than initial tightness.
RAYS addresses this through spring-loaded seats, a dual sealing system (lip seal + graphite), and an extended stem design that compensates for thermal effects and stabilizes sealing behavior over time.