What is the difference between an air operated diaphragm pump and a diaphragm metering pump?

　　Air operated diaphragm pumps and diaphragm metering pumps belong to a type of volumetric pumps, air operated diaphragm pumps are the use of diaphragm back and forth drumming changes to make the working volume for the suction and discharge of liquids, air operated diaphragm pumps and diaphragm metering pumps the difference between the diaphragm pumps are used to pump the media, diaphragm metering pumps can be pumped and quantitatively dispensed media. Can be compared to a bucket of water with a diaphragm pump pumped to another bucket, can be a bucket of water with a diaphragm metering pump pumped to a different bucket, diaphragm pumps in the initial design, in order to quickly pump, the flow rate will generally be very large, the diaphragm metering pumps can be fine points of the flow rate, the design of the flow rate is generally very small.

　　The difference between pneumatic diaphragm pumps and diaphragm metering pumps

　　The difference between pneumatic diaphragm pumps and diaphragm metering pumps lies in the characteristics and structure of different

　　Pneumatic diaphragm pump

　　(1) diaphragm pumps without rotating parts, no shaft seal, diaphragm and other pumping medium and pneumatic diaphragm pump working parts, the medium is completely separated, the pumping medium will not leak, pumping toxic or volatile media, is not easy to cause contamination, a personal hazard.

　　(2) Good circulation, more spacious flow. Can pass through the particles of larger diameter, diameter of 10 millimeters, pumping mud and impurities, wear and tear will be small.

　　(3) Use in flammable and explosive occasions without electricity, will not produce static sparks.

　　Diaphragm metering pump

　　(1)Vertical structure can be installed in the pipeline like a valve, easy to install, maintenance, the motor and impeller can be pumped out separately, the pipeline does not need to be disassembled.

　　(2)Graphite slide bearing lubricated by pumping medium, low noise, no need to refuel, maintenance cost reduction.

　　(3) Fully enclosed structure, can pump toxic and hazardous substances.

　　Reference: What is the difference between pneumatic diaphragm pumps and diaphragm metering pumps