| 摘要 |
Dual main valve consists of housing and cover connected together and executed with internal cylindrical control channels, which are equipped with the seats located at the ends of cylindrical bulges of housing and cover, outlet channel, flattened mobile sealer, which is placed in the space between the bulges of housing and cover with possibility of alternate interaction by its surfaces with the seats. Sealer has perimetric flanges on both surfaces and is made with evenly located guides in the circle perpendicular to the surfaces, height of thoseexceeds the size of the space between the bulges of housing and cover. In this case, the internal surfaces of guides interact with external surfaces of bulges.
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