AUSTRALIAN Penstock & Damper Valve Company has released a steam isolation valve with full isolation for pressure classes to ANSI 408.6kg. For special projects a rating of 681kg is available. Available sizes range from 76.2mm to 609.6mm.
The operating mechanism of the valve rotates the disc to a closed position before driving it into its seat for an effective seal. There is no friction during operation and the valve seals bidirectionally. Benefits include a reduced face to face when compared to ball valves and gate valves.