5 JAMESBURY VALVE SOLUTIONS Energized Seat When the valve is shut, the disc slightly deflects and the seat “energizes.” While energized, the seat’s sealing surface is constantly pushing against the edge of the disc. Unique polymeric sealing provides trouble-free operation. Pressure on Insert Side When pressure is on the insert side, pressure is applied under the seat lip, further amplifying the sealing force between the disc and the seat. Pressure on Non-Insert Side When pressure is on the non-insert side, the disc moves into the seat. Due to the spherical profile of the disc, the more the disc moves into the seat, the tighter the shut-off. Excessive movement of the seat is limited by the flexible lip, which contacts the bottom of the grooves in the insert ring. Insert Seat Body Insert Seat Body Insert Seat Body
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