Fig.223/224 butterfly valves are based on a concentric design with multiple unique solutions.

The curved slope of the seat sealing surface, combined with an extended sealing area at the flange connection, is engineered to deliver low and stable operating torque while maintaining high sealing performance. This design allows the valve to be installed in the pipeline without a gasket and also enables reliable operation in vacuum applications.

The valve offers extended service life, even under frequent operation. It is suitable for both manual and automated actuation and is widely used in water supply, HVAC, and general industrial applications.