cryogenic butterfly valve
A cryogenic butterfly valve is a specialized control device engineered to operate efficiently in extremely low-temperature environments, typically ranging from -150°C to -270°C. This valve features a disc-shaped control element that rotates on an axis to regulate flow in cryogenic applications. The valve's construction incorporates specialized materials, such as stainless steel or bronze alloys, specifically chosen for their ability to maintain structural integrity and performance in severe cold conditions. The design includes extended bonnet arrangements that protect the packing and stem seal from extreme temperatures, while special cryogenic seats and seals ensure reliable operation and tight shutoff. These valves are essential in industries handling liquefied natural gas (LNG), liquid nitrogen, liquid oxygen, and other cryogenic fluids. The valve's unique design allows for quarter-turn operation, making it both quick and easy to operate while maintaining precise flow control. Advanced features include thermal extension compensation mechanisms, specialized stem sealing systems, and fire-safe designs that comply with international safety standards. The valve's compact design and lightweight construction make it ideal for applications where space is limited, while its robust construction ensures long-term reliability in demanding cryogenic services.