parallel type Gate Valves with vertical sealing: two parallel, namely the centerline of the parallel seal gate valves. Parallel type gate usually adopt double disc structure.
In parallel type valves, to thrust wedge structure, most common in the two gate has double thrust wedge, the gate voltage and diameter (applicable to DN40-300mm) gate. There are two wedge between spring-loaded, spring can produce a wedge to be preloaded force, the seal.

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