| 摘要 |
A replaceable valve liner for valves of the knife gate type includes a main body liner member of a generally cylindrical configuration adapted to be positioned in the flow passage through the valve and having a circular radially outwardly directed positioning flange at one end adapted to abut one side of the valve housing when so positioned. A removable ring flange is adapted to be positioned on the main body liner member at the opposite end from the positioning flange and is similarly adapted to abut the housing on an opposite side thereof. A slide gate liner member in the configuration of a flattened sleeve has a slot therethrough in which the slide gate of the valve is slideably received. The slide gate liner member has a fragmented circular notch formed in one end so that it can be seated on an outer surface of the main body liner member in alignment with a slot through the main body liner member such that the slide gate can be moved between a closed position in which it blocks the flow passage through the valve and an open position retracted into the slide gate liner member. The valve liner is preferably made of a material such as polyurethane having long-wearing characteristics and having the ability to form fluid-tight seals with the valve and adjacent fluid flow conduits connected to the valve.
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