cryogenic globe valve
A cryogenic globe valve is a specialized control valve designed to handle extremely low-temperature fluids and gases, typically operating in environments below -150°C. These valves are engineered with exceptional material properties and unique design features to maintain operational integrity under severe cold conditions. The valve's primary function is to regulate flow in cryogenic applications while preventing thermal stress and maintaining leak-tight sealing. Constructed using materials like stainless steel and bronze alloys, these valves feature extended bonnets that protect the packing material from extreme cold, preventing embrittlement and ensuring reliable operation. The valve body incorporates special cryogenic trim designs that accommodate thermal expansion and contraction, while multi-layer stem sealing systems prevent fugitive emissions. Advanced manufacturing techniques ensure precise control characteristics and bubble-tight shutoff capabilities. These valves find extensive applications in LNG processing, air separation units, aerospace facilities, and other industries requiring the handling of liquefied gases such as nitrogen, oxygen, and helium. The design typically includes an extended bonnet configuration that creates a thermal barrier between the cryogenic fluid and the valve's operating mechanisms, ensuring consistent performance and extended service life.