Cryogenic Gate Valves

Key Application

• For use in the application of liquid nitrogen, liquid hydrogen, liquid oxygen, etc. in fields such as the electric power industry, petroleum refining, petrochemical engineering, offshore oil, chemical engineering in urban construction, and other ultra-low temperature services.

Design Features

• Sizes from NPS 2” to 48”(DN50 to DN1200)
• CLASS 150 to 2500 （PN20 to PN420）
• Operating temperature -196℃ to 300℃ (the range of service temperature may vary for different materials )
• The sealing faces of the valve seat and valve clack are hard faced with alloy to improve the erosion resistance and extend the service life of the valve
• The main parts subject to a temperature ≤-101℃ are subzero treated to prevent valve deformation under ultra-low temperatures
• SS+ graphite or metallic seal or pressure self-sealing is adopted between the valve body and bonnet for reliable sealing
• Rising stem structure, making the valve switch position be clear at a glance
• The valve stem thread will not come into contact with the medium, so the corrosion of medium to the thread is reduced
• A small switching moment, reliable sealing
• The gate valve has the wedge resilient, self-sealing parallel double-plate and stretching type parallel double-plate structures, so the sealing performance is good
• Small flow resistance, high flow capacity and good flow characteristic
• For small wedge resilient gate valves, the interchangeability can be ensured with process tooling
• By improving the structural design and selecting reasonable packing structure and qualified packing supplier, the valves can meet the Class A sealing test requirements of ISO 15848 FE