AF-GVC Cryogenic Globe Valve

• Body & Bonnet: Made from bronze castings or austenitic stainless steel investment castings for superior impact strength, minimal heat loss, and corrosion resistance.
• Stem: One-piece design for reliable alignment and strength; mirror-finished surface ensures effective packing sealing.
• Packing: Chevron PTFE or plastic packing insulated by gas; fire-safe design includes secondary graphite packing.
• Gaskets: Bonnet or cap gaskets (e.g., V#7020, GYLON 3500, or SS Graphite Spiral Wound) are oxygen-compatible and suitable for cryogenic applications.
• Seating: Self-centering disc with replaceable PCTFE (Kel-F) seat for bubble-tight seals; Stellite 6 metal-to-metal seating prevents seizing and galling.
• Extension Options: Custom extension lengths available upon request.
• Vent Holes: Incorporated in gate valve wedges to relieve excess pressure from vaporization of cryogenic liquids
• Cleaning: Valves for oxygen/cryogenic service are degreased, cleaned, and sealed in a clean room to prevent contamination.

Designed for the production, transport, and storage of liquefied gases such as

Oxygen

Nitrogen

Argon

Natural gas

Hydrogen

Helium

LNG liquefaction plants and receiving terminals.

LNG cargo systems.

Aerospace ground support facilities for liquid hydrogen and oxygen.

Supplied with extended bonnet with a sufficient gas column length, usually specified by the user, to keep the stem seal packings exposed only to vapor and not the cold liquid to ensure functional integrity.