FIELD: building, particularly to erect building envelopes adapted for sealing of door opening made in room with risk of periodical pressure increase, for instance in explosive hazard rooms.
SUBSTANCE: door has hinged door leaf provided with sealing member connected to one side of the door leaf and pressing member. Door leaf has offloading opening closed with valve sealed along valve perimeter and secured to door leaf by pin installed in lugs. Valve has fixing mechanism. Valve pin is offset in vertical direction upwards or downwards from horizontal axis of valve symmetry and installed in lugs so that pin may perform vertical displacement. Valve fixing mechanism is installed on pin through clamps tightened by threaded connections. Clamps have fixing areas formed on inner surfaces thereof brought into contact with valve pin.
EFFECT: increased door reliability due to automation of interior pressure drop.
4 cl, 5 dwg
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