Crane FKX 9000 Butterfly Valve: Triple Offset Explained

The Crane®FKX 9000 Triple Offset valve design is recommended for industrial applications where large bore valves handle hot steam or isolate parts of their plants and have high/low temperatures that prevent the use of rubber lining elements.

Here’s an explanation of “Triple Offset”:

Offset One

This offset applies to the center line of the disc/seat sealing surfaces that provides an uninterrupted sealing surface.

Offset Two

This offset refers to the location of the shaft with respect to the center line of the bore, which enables a calming action of the disc to minimize rubbing and wear between the seat and seal.

Offset Three

This offset is the axis of the seat cone angle that is offset from the center line of the valve bore to eliminate rubbing of the seat/seal contact surfaces during operation and to preserve sealing integrity over the cycle life of the valve.

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