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Brown - figure 452

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Double-acting pump. Cylinder closed at each end, and piston-rod passes through stuffing-box on one end, and the cylinder-has four openings covered by valves, two for admitting water and like number for discharge. A is suction-pipe, and B discharge-pipe. When piston moves down, water rushes in at suction-valve, 1, on upper end of cylinder, and that below piston is forced through valve, 3, and discharge-pipe, B ; on the piston ascending again, water is forced through discharge-valve, 4, on upper end of cylinder, and water enters lower suction-valve, 2.

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Documents: 507 mouvements mécaniques
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