Triple-offset disc rotation: Provides bubble-tight sealing without rubbing or galling.Cryogenic stem packing: Composed of superposed Viton O-rings and expanded graphite rings (fire safe approved).Extended bonnet: With a sufficient gas column to keep the stem packing away from cold fluid. Extended bonnet length is qualified for use in LNG application with type approvals from major classification societies
No cavity: No cavity to prevent build-up of solids.
Drainage possibility: The bottom cover can be removed if drainage is required.
Internal blow-out protection: Prevents the shaft from blowing out under pressure.
Inherent fire safe function: Stainless steel construction and metallic seal provide inherent fire safe function.
Reinforced stainless steel shaft bearings: For high cycles and smooth operation at very low temperatures.
Velan Cryogenic triple-offset Butterfly valve Specifications:
Minimum Temperature (C)
Pressure Nominal from (bar)
Pressure Nominal to (bar)
- Actuator Type
Manual, pneumatic (single or double-acting type), electric or hydraulic according to customer specification
- Design standard
Low fugitive emissions: in accordance with ISO 15848/Ta-Luft,IEC 61508.
- Other parts' material
Disk:A351Gr.CF8M,shaft:A453Gr.660Cl B type2,O-ring:viton
- Media (working fluid)
See full specifications