The simplicity of a peristaltic metering pump makes it a very appealing method for injecting a wide variety of chemicals into water treatment applications. Understanding the variables that result in wear on the pump tube can assist the reader in specifying the most appropriate tubing for the application. Commonly called "squeeze tube pumps," the new generation of peristaltic metering pump is quite different from the low pressure, non-industrial peristaltic pumps most people are familiar with seeing in a hospital setting. These industrial workhorses are now capable of long tube life and high output pressures. Some models also include such features as tube failure detection systems, flow verification sensors, and sophisticated control electronics for connection to SCADA systems. But one of the greatest benefits of a peristaltic pump is its simplicity. Peristaltic pumps utilize a circular pump "head" and simple rotating roller designed to pinch the tubing and gently squeeze the fluid through specially designed tubing. Without valves to clog, metal springs to corrode or ball seats to fail they can effectively pump both fluids and gasses, eliminating the possibility of vapor locking and loss of prime.
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