The Triple Offset Butterfly Valves has a metal seated structure that allows this valve to be used for extremely high working pressure and temperature.
Thanks to its triple eccentric structure, externally is applied a seal specific pressure on the shaft driving torque in order to allow the valve disc and seat to form an oblique con seal surface. In this way the leakage (usually caused by ageing, cold-flow characteristics and losing elasticity of the seat) is avoided.
Different face to face available according to your request (example ISO5752 Series 13, EN 558 Series 13).
Furthermore, in order to eliminate mechanical abrasion of seat because of the disc rotary, the disc of the valve has been arranged in order to touch the seat tightly only in fully closed position.
This valve can be supplied with bare shaft ISO 5211 mounting pad connection or can have several operation type: Manual, Worm Gear, Electric, Pneumatic, Hydraulic. In addition it can provide a fireproof stopper driver.
According to your request, the Triple Offset Butterfly Valves can be provided Lug, Wafer or Flanged type.