Cryogenic ball valves are specialized valves designed to operate efficiently at extremely low temperatures, typically below -100°C (-148°F). These valves are crucial in applications involving liquefied gases such as liquefied natural gas (LNG), liquid oxygen (LOX), liquid nitrogen (LIN), and other cryogenic fluids.
1. Material Selection: Constructed from materials that retain their strength and toughness at low temperatures, such as stainless steel and specialized alloys.
2. Extended Bonnet: Features an extended bonnet to ensure the stem seal is kept away from the cryogenic fluid, preventing frost formation and maintaining reliable operation.
3. Low-Temperature Seals: Utilizes seals and seats made from materials suitable for cryogenic conditions, ensuring leak-tight performance.
4. Double Isolation: Often designed with double isolation and bleed configurations to enhance safety and reliability in cryogenic systems.
5. Operational Efficiency: Designed to provide efficient operation and minimal torque requirements even at low temperatures.
1. Leak-Tight Performance: Ensures safe and efficient containment of cryogenic fluids, preventing leaks and potential hazards.
2. Durability: Designed to withstand the stresses of thermal cycling and extreme temperatures.
3. Safety: Features like extended bonnets and double isolation enhance the safety of cryogenic systems.
4. Reliability: Provides consistent performance in critical low-temperature applications.
1. Extended Bonnet: Keeps the stem packing away from the cold zone to avoid frost and ensure easy operation.
2. Pressure Relief: Incorporates pressure relief features to handle pressure build-up due to thermal expansion of trapped cryogenic fluids.
3. Low Emissions: Designed to meet stringent low-emission requirements, minimizing environmental impact.
