Water and Wastewater Terms Beginning D

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

diaphragm pump

A pump in which a flexible diaphragm, generally of rubber or equally flexible material, is the operating part. It is fastened at the edges in a vertical cylinder. When the diaphragm is raised, suction is exerted, and when it is depressed, the liquid is forced through a discharge valve.