FIELD: mounting ventilation intake and exhaust air valves on flat structural members of ceiling or wall panels. SUBSTANCE: mounting frame includes body of cylindrical configuration fitted with circular flange over its leading edge which is mainly perpendicular relative to central axis of cylindrical part of body; this panel is subjected to machining for making hole whose diameter and configuration coincide with those of cylindrical portion of mounting frame; mounting frame is inserted in this hole in such way that its circular flange remains at the same level with front surface of above-mentioned panel; mounting frame has threaded portion which is located at some distance from inner surface of its cylindrical portion for fitting the valve in mounting frame. Cylindrical inner surface of mounting frame has at least two opposite chute-shaped grooves for alternative mounting of valve body with wire clamp in mounting frame. EFFECT: possibility of fitting valves of various types. 3 cl, 1 dwg
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