A slab gate valve is a sliding valve in which the closing members are parallel rams. The closing member may be a single shutter or a double shutter with a distracting mechanism therebetween.
The pressing force of the shutter to the valve seat is controlled by the medium pressure acting on the floating gate or the floating valve seat. If it is a double gate slab gate valve, the expansion mechanism seen by the two gates can supplement this pressing force.
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