Gorman-Rupp End-Suction Pumps Designed for High Flow, Greater Head

Gorman-Rupp End-Suction Pumps Designed for High Flow, Greater Head
6500 Series line of centrifugal pumps from Gorman-Rupp Company

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The 6500 Series line of horizontal end-suction centrifugal pumps from Gorman-Rupp Company are based on Prime Aire and Prime Aire Plus technology for high-level performance in the handling of solids and water in wastewater treatment plants.

Designed for up to 4-inch solids, the pumps offer automatic priming and re-priming for sewage bypass operations and other applications where intermittent flow can be a problem.

“The 6500 Series can be used on plant processes like return activated sludge and waste activated sludge,” says Vincent Baldasare, sales manager, engineered systems, Gorman-Rupp. “Other processes include influent equalization, effluent pumping, dewatering, sludge loading and non-potable utility water applications.”

Pump sizes range from 3 to 16 inches with the 16-inch pump capable of delivering flows up to 15,000 gpm and the 10-inch model capable of 540 feet of total dynamic head.

Features include ductile iron casing, oversized bearings for longer life, alloy steel shafts with stainless steel options and sight gauges on both sides of the bearing and seal cavities.

“If the pump is installed against other equipment or against a wall and the sight gauge happens to be on either the left side or the right side of the pump, it might be in a spot that is not easily viewable,” he says. “We chose to put the sight gauges on both sides of the bearing housing and the oil cavity. It’s your eyes inside the bearing cavity or seal cavity to see if there’s enough oil in there and it’s in good condition. If that oil would appear milky in color, it would be indicative of potential seal failure or potential lip seal failure. It’s a maintenance feature that we provide.”

Other features include oversized bearings for longer life, double volute on larger models, atmospheric vent, side access inspection port (solids handling models) and Smart Scroll indexable discharge locator.

“We’re able to move the discharge location in almost any position from 180 degrees on the left and right side of the pump,” he says. “That’s important from a retrofit application. If you’re replacing another brand pump, you can rotate the discharge location to match the existing piping, which would eliminate having to do any major re-piping of the system.”

The 6500 Series pumps require minimal maintenance.

“Some of the things we offer are a replaceable wear ring, which is secured to the suction head,” Baldasare says. “We supply pusher bolt holes for easy removal of the wear ring. We also have pusher bolt holes for removal of the suction head to access the wear ring as well.” 419/755-1011; www.grpumps.com.


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