External gear pump metering success with sodium hypochlorite

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 799 KB
• Volume: 2009
• Category: Article
• ISSN: 0262-1762
• DOI: 10.1016/s0262-1762(09)70021-5

✦ Synopsis

In January 2006, World Pumps published a feature on external gear pumps for metering sodium hypochlorite and other wastewater treatment chemicals. Here, a US wastewater treatment company found that an external gear pump was so successful that they have been used to meter sodium hypochlorite ever since. V allejo Sanitation and Flood Control District, Vallejo, California USA is a 60 MGD wastewater treatment facility. Vallejo Sanitation has used magnetically coupled external gear pumps to meter 12.5% sodium hypochlorite since 2003. The compact magnetically coupled external gear pumps easily replaced the typical diaphragm type metering pumps. The non-pulsing magnetically coupled external gear pumps eliminated vapor locking, eliminated the pulsation dampener, reduced maintenance downtime, reduced maintenance costs, and reduced chemical usage.