FIELD: machine building.
SUBSTANCE: system comprises sealing flange arranged between two plant sections with provision of tightness and including gap protected by temporary cover. Unit is supplemented with gate formed by two valves arranged opposite to each other before insertion into gap. After complete insertion of gate, both valves may be disconnected to provide for tight coverage of both parts of isolated part by each valve. It is used in tight plants for apply method of maintenance under vacuum, where it is required to specially maintain tightness.
EFFECT: system makes it possible to isolate two devices included into composition of plant with closed medium, without violation of tightness inside this plant.
8 cl, 10 dwg
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