Cryogenic Check Valve with flanged ends: Overview, Structural Features & Technical Parameters

Cryogenic Check Valves with flanged ends automatically open and close the valve disc relying on the flow of the medium itself to prevent medium backflow. Cryogenic Lift Check Valves with flanged ends are suitable for cryogenic media such as methane, liquefied natural gas, ethylene, carbon dioxide, liquid ammonia, liquid oxygen, liquid nitrogen, etc.

Structural Features

• Cryogenic-Specific Flange Connection: Adopts large-diameter bolts and a special gasket structure to compensate for flange deformation caused by material shrinkage at low temperatures and ensure sealing reliability.

• Cryogenic Material System: The valve body is made of cryogenic-specific stainless steel or nickel-based alloy, and the sealing elements are made of low-temperature resistant PTFE, ensuring no embrittlement at -196℃.

• Multi-Layer Sealing Design: Adopts a combined metal and non-metal sealing structure; the first layer of soft seal ensures zero leakage at low temperatures, and the second layer of metal seal provides fire safety protection.

• Fire and Explosion Protection Certification: Complies with API 607 fire protection standards and ATEX explosion-proof certification, meeting strict safety requirements.

• Long-Life Sealing System: The sealing surfaces of the valve disc and valve seat are overlay welded with Stellite alloy, with a hardness of HRC48-52 and a wear-resistant life of more than 1 million cycles.

• Anti-Freezing and Blocking Design: Optimized flow channel design avoids medium retention, and a special thermal insulation structure reduces external heat input to prevent internal freezing and blocking of the valve.

• Easy Maintenance: The flange connection design allows on-line replacement of sealing components without disassembling the entire valve, reducing maintenance costs and downtime.

Technical Parameters

• Product Name: Cryogenic Check Valve with flanged ends

• Valve Body Material: Stainless Steel

• Connection Method: Flange Type

• Nominal Pressure: 4.0MPa

• Nominal Diameter: DN10~DN150

• Actuation Mode: Automatic

• Applicable Media: Gases and liquids such as LNG, LO2, LN2, LAr, CO2, etc.

• Applicable Temperature: -196℃～+80℃

• Bonnet Material: CF8

• Packing and Sealing Ring Material: PTFE, PCTFE

• Medium Flow Direction: From below the valve disc upward

• Manufacturing Standards: National Standard GB / Ministry of Machinery Industry Standard JB / Ministry of Chemical Industry Standard HG / American Standard ANSI/API / Japanese Standard JIS / German Standard DIN / Customization according to other standards