The sealing system was developed for highly abrasive or very sensitive media.

Available for all resilient seated butterfly valves with interchangeable seat.

In closed position, the liner will be pressed against the disc using low air pressure.The media is sealed off securely.

Before opening the disc, the chamber is vented behind the liner. This creates an air gap between the liner and the disc, hence low torque is required to open the valve.

ADVANTAGES

Extremely low wear of parts even in contact with abrasive media.

Low sized actuators due to reduced torques.

Low grinding/-clamping of sensitive media between disc and liner.