Flexachem Manufacturing Ltd

Diaphragm Pump

A diaphragm pump is a type of a positive displacement pump that uses a combination of the reciprocating action of a rubber or teflon diaphragm and suitable non-return check valves to pump a liquid.

Sometimes this type of pump is also called a membrane pump.

A double diaphragm pump or an Air Operated Diaphragm Pump (AODD) uses compressed air as a power source. It operates by forcing the air out of one chamber and into the next, this action is simultaneous and results in pumping the liquid out of one chamber and into the discharge piping while the other chamber is filling with liquid.

The main characteristics of a Diaphragm Pump are;

• Low to moderate capacity
• Low to moderate pressure
• Very low efficiencies
• No seal
• High pulsation