1. Centrifugal Pumps*
- Use centrifugal force to push the fluid through the outlet. Examples of ours:
Webster ® Sealless Pumps, Hayward R-Series, March and Little Giant Magnetic Drive Pumps, Sethco Sealless Electric and Self Priming Magnetic Drive Pumps, and Lutz Sealless Drum Pump.
2. Metering Pumps - Bellows, diaphragm, peristaltic, piston, and syringe pumps are all metering pumps that pull the fluid through the inlet valve into a chamber, close the inlet valve, and then push the fluid through the outlet valve.
Examples of ours: Meco-O-Matic® pumps, March® Metering Piston Type, Bellows
Type Metering Pump, and Variable-Speed Pumps.
3. Positive Displacement Pumps - Bellows, double-diaphragm, flexible impeller, gear, oscillating, piston, progressing cavity, rotary lobe, rotary vane, and peristaltic pumps have a fixed cavity that the fluid is pushed through by rollers, gears, or impeller. As the fluid is pushed through, it leaves a void or vacuum which pulls in more fluid.
Examples of ours: Variable Speed Pump, Sandpiper ® Diaphragm Pumps, Gormann-Rupp Oscillating Pump, Jabsco Flexible Impellor, Vanton Flexi-liner Sealless Pump, Little Giant Tube Pump, Chemical Transfer Gear Pump, and Portable Peristaltic Pump.
* Centrifugal force is an outward force associated with rotation.
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