FIELD: manufacture of diaphragm pumps. SUBSTANCE: double-action diaphragm pump has housing with inlet and outlet holes, two diaphragms installed in the housing so that they form drive and working chambers, slide valve formed by connecting rod and feed channels, and control valve. The control valve is mounted in its own seat. It turns round its axis through 90 deg. and is provided with grooves at three levels. EFFECT: improved efficiency of pump operation. 3 dwg
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