首頁產品資訊 Velan Gate, globe, and check valves Quarter-turn Valves Velflex Cryogenic High Performance Butt Weld Butterfly Valve

Velflex Cryogenic High Performance Butt Weld Butterfly Valve

Size Range
NPS 6 - 42 (DN 150 - 1050)
Pressure Class
ASME classes 150 - 300
Standard Connections
Butt weld

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.