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Gregg E. Johnson, Cole-Parmer, Barrington, IL, USA.
A common problem with feeding commercial sodium hypochlorite (NaOCl) and other high strength chemical oxidants is outgassing. Outgassing occurs when a pocket of vapor forms in the fluid line, obstructing normal flow. Outgassing often vapor locks chemical metering pumps and can lead to system leaks and result in unscheduled downtime and poor process performance. Another common problem with feeding NaOCl is hard water scale, which can completely jam the operation of a pump’s wet end.
The inherent design of Masterflex peristaltic pumps eliminates the potential for vapor lock because the fluid being pumped never actually touches the pump, but rather is occluded, or squeezed, through elastomer tubing. This squeezing action of the flexible tubing generates a powerful vacuum that moves both gases and liquids simultaneously, without clogging or producing vapor lock. Scale problems in the pump also are a non-issue because there are no valves or seats to foul in the fluid stream. Masterflex pumps provide wastewater treatment operations extremely versatile liquid chemical feed and fluid handling with the highest reliability and long-term operation plus simple, low maintenance. There is no unscheduled downtime to bleed the lines of vapor locked pumps, no problems with scaling, and no valves or seats to clog or wear out. Together with new formulations providing tubing life in excess of 10,000 hours, makes Masterflex the pump of choice when performance counts.
Fluid being pumped never touches the pump, only the tubing, which means the pump lasts a long time and the same pump can be used for various fluids by simply changing the tubing. Masterflex pumps are self-priming (to 29 feet down), can operate dry without damage, produce no siphoning effect when stopped, have an accuracy rate better than 1 percent and are easy to maintain. As municipal and industrial wastewater treatment operations become more specialized and complex, carrying out precise dosing, chemical delivery, and product transfer operations is critical. With all this going for them, it’s easy to see why Masterflex pumps are a highly viable alternative to diaphragm metering, lobe, gear and progressing cavity pumps in meeting the stringent challenges in wastewater treatment applications.
Masterflex pumps provide multiple advantages over diaphragm liquid metering pumps.
Peristaltic design makes it a primary choice for use in wastewater treatment. A Pump Head consists of only two parts: the rotor and the housing.
Masterflex pumps are self-priming (to 29 feet down), can operate dry without damage, produce no siphoning effect when stopped, have an accuracy rate better than 1 percent, and are easy to maintain.
Learn more about wastewater: What is Wastewater?