STRAIGHT-FLOW LIQUID-OPERATED DIAPHRAGM PUMP Russian patent published in 2000 - IPC

FIELD: mechanical engineering; handling of contaminated liquids, drilling muds, concretes, and mortars. SUBSTANCE: diaphragm pump consists of three sections communicating through hydraulic distributors with sections of liquid-operated pump. Diaphragm pump sections are made in form of tubular housings, accommodating flexible tubular diaphragms. Valves have seats with dampers. Triple capacity changer is also provided. Flexible tubular diaphragm operates at no significant pressure differential, and valves, with soft fit. EFFECT: provision of long and reliable operation of small-size liquid-operated diaphragm pump operating at high pressure. 4 cl, 8 dwg