Description: If you need an accurate and consistent volumetric flow rate, a metering pump is necessary. A metering pump moves water, pump chemicals, and other liquids in the specified schedule. Thus, providing you with a precise flow rate reading. Metering pumps are available in four categories - diaphragm pumps, piston pumps, gear pumps, and peristaltic pumps. Diaphragm pumps have a flexible diaphragm. With each stroke, the diaphragm will move or pulsate. Piston pumps are somewhat similar, but instead, it has a reciprocating plunger. Gear pumps, on the other hand, use gear to initiate the liquid transfer. Lastly, peristaltic pumps have tubes. For your chemical metering pumps, directly get them here at MRO Supply. We have Grundfos pumps in different voltage specifications. Shop now.