KNIFE GATE VALVE HAVING ELASTOMERIC SEALS

摘要

A gate seal (52) for a knife gate valve comprising a sealing surface lining the gate channel and an integral gasket for compression between valve body halves, a chest seal (54) for a knife gate valve comprising a body having an expandable sealing surface and one or more injection chambers (60) adapted to receive an injectable packing, each chamber having a cross-sectional area that is completely surrounded by the body member, and/or a knife gate valve comprising one or both such seals. The chest seal body may comprise a knife gate slot (56) that is peripherally surrounded by the body. The gate seal (52) and the chest seal (54) may comprise a single integral elastomeric member or separate components.