Velan, Inc. Flanged Valves

High performance cryogenic metal-seated butterfly valves featuring Velflex flexible metallic seating technology Features and benefits • Stem seal: Viton O-rings; Expanded graphite ring for fire safe • No cavity: There is no cavity to allow build-upof solids • 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.