Vanton recently introduced a new Chem-Gard® CGMC close-coupled, magnetically driven thermoplastic centrifugal pump in sizes from 1.5x1x6 to 3x2x8 in. for flows to 400 gpm at heads to 220 ft TDH. The close-coupled design reduces overall length by approximately 20 percent, allowing placement in restricted spaces typically encountered in replacement and OEM applications. |
Case Study
The performance of the aforementioned, magnetically driven thermoplastic pumps is demonstrated by a typical installation at a major WTP, in which two sealless, magnetically driven thermoplastic pumps move sodium hydroxide from 12,500 gallon double wall storage tanks to a 500 gallon double wall day tank on demand.
In 1997 the plant switched from a manual system using granular hydrated lime to an automated, instrumented system based on neutralizing with 25% sodium hydroxide, to maintain an alkaline pH in 24 mgd of wastewater.
The pumps are 3 x 2 in. polypropylene flanged designs with 6 in. keyed impellers that handle 55 gpm at 30 ft TDH. They have dual nonmetallic containment can assemblies, and high performance permanent rare earth magnets driven by 3 hp, 460/3/60, 1800 rpm, chemical duty motors.
The casing, casing cover and impeller are molded of homogeneous polypropylene, and the stainless pump shaft is isolated from the fluid by a thick-sectioned thermoplastic sleeve.
The pumps are tied into programmable controls that have eliminated manual labor, reduced operating and reporting time, provided more accurate and timely operational information and records, and materially improved the workplace environment.
After approximately 13 years of 24/7 operation, the magnetic drives and thermoplastic wet ends of these pumps have performed without failure.
Success of the overall installation prompted the facility to increase capacity of the system from 24 to 36 mgd. WW
Vanton is an exhibitor at the WEFTEC.10 event and can be found at Booth No. 3051
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