butterfly valves

Design Features Advance Gunric Metal Seating High Pressure butterfly valves provides a bi-directional bubble tight shut off. This is achieved by introducing state-of-the-art triple eccentric disc geometry.The valve shaft is off-set against the seal, (1st off-set), and against center line of the valve (2ndt off-set). The seating edges are machined with a continuously changing slope from an angle alpha on top of the oval seat ring to an angle beta at the opposite side (3rd off-set angular). This geometry ensures that the seat ring stays clear of the seat except at the final shut-off position, resulting in long seat life and operating cycles in excess of 500 000.

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