At a wastewater treatment plant in Dekalb County, Georgia, progressing cavity pumps experienced dry running problems and consequential high maintenance costs when dosing flocculent.
The polymer medium was described as a "High Charge Cationic Emulsion (trade name of Clarifloc SE1080)". Verder Inc recommended the use of Verderflex Dura Peristaltic hose pumps.
The Verderflex Dura pumps run effectively with the NBR hose, which currently has a hose life of approximately six months.
The pumps have pp flanges, are running intermittently at 20 rpm indoors, using 1/2 Hp 90V dc motors to allow extended frequency turndown.
Verderflex Dura pumps gave the customer the following benefits:
- Run-dry conditions are inherent at times in this polymer feed system; the progressing cavity pumps were not reliable.
- Other brands’ rollers would not maintain consistent lubricity and kept tearing up the hose: even after the rep upgraded hose material.
- The simplicity of Verder’s hose replacement, whereas the previously installed progressing cavity pumps required two days for removal, repair, and installation.
- Replacement parts cost a small fraction of what the progressing cavity pump do; also the parts are much lower.
- Verderflex pumps are engineered to solve your difficult pumping problems, including ease of maintenance, dry running, or accurate dosing.
- Ease of mounting the Dura pump footprint onto the existing pump skid and also the flanged connections.