Velflex cryogenic high performance butt weld butterfly valves

Features & Benefits

• Stem seal: Viton O-rings; Expanded graphite ring for fire safe
• No Cavity: There is no cavity to allow build-up of solids
• In-line servicing: Allows quick and easy in-line seat inspection or replacement within minutes
• Double offset: Ensures a progressive smooth and low friction seat-disc closing. Hardened sealing surface to provide high level of tightness and long lifetime
• Fire safe design: All metal construction providing inherent fire safe
• Unique sealing system: Combined with the eccentric disc rotation, the patented flexible metallic seat provides an exceptional tight shutoff even with high temperature fluctuations
• Actuators: Pneumatic, hydraulic, electric or manual gear; fast acting actuators for Emergency Shut Down (ESD) function
• Extended bonnet: With a sufficient gas column to keep the stem packing away from the cold fluid
• High quality castings: With X-ray and PT examinations from approved foundries
• Stainless steel shaft bearings: Coated with nickel-reinforced PTFE for high cycle and smooth operation
• Reliability: Reliability of valve operation affects service life and ease of inspection and maintenance. In order to predict reliability, a sound valve design must be backed up by a stress analysis and functional qualification testing under critical operating conditions.