Double Eccentric Butterfly Valve

Double eccentric design
The double eccentric design gives minimal wear of the disc seal, as the disc swings open/close like a door relieving the stress on the seal just after a few degrees of opening. The seal is fully compressed in closed position which gives 100% drip-tight closure. The disc and seat are designed to give the lowest possible operating torque in opening and closing direction at full differential pressure.

Shaft sealing
Encapsulated O-rings, self-lubricating bearings and bronze bushings protect against galvanic corrosion.

Disc and seat design
The slim and streamlined disc design ensures low pressure loss across the valve, and the disc enables bi-directional flow. The seat is casted in the valve body, which is epoxy coated to avoid corrosion. The disc seals are mounted in a stainless steel retainer ring, and are exchangeable independent of flow direction. The disc is fixed by means of a keyway and set screws protecting against flutter between shaft and disc.