FIELD: manufacture of pumps. SUBSTANCE: wound on drum of hermetic chamber provided with vertical branch pipe is flexible tape. One end of expulsor made in form of hose is secured in branch pipe and other end provided with flap valve is connected with drum by means of tape. Hose and tape are woven of lavsan and inorganic high-aluminum fibres at the following relationship of components,%: high-aluminum fibres, 60 to 80 and lavsan, 20 to 40. EFFECT: enhanced efficiency. 1 dwg, 1 tbl
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