How Cutter Pumps Differ from Grinder & Chopper Pumps

February 15, 2019 02:07 PM

 
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Pumps & Systems February 22 issue: https://www.pumpsandsystems.com/topic/pumps

Cutter pumps resolve nuisance clogs for Pocono Township by Matt Dobroskey & Mike Klimes

Larger particles in wastewater are often unavoidable and lead to clogging of the pump. With more hygiene and cleaning products being considered “flushable,” these costly clogging issues are becoming more prevalent in municipal wastewater applications. Cutter pumps were designed to resolve the common issue of clogging due to ragging.

Cutter pumps chop solid matter before pumping. In some cases, a tungsten carbide cutting tip is integrated onto the leading edge of the nonclog impeller. The cutting tip and the saw-shaped edge of the suction plate form the cutting mechanism. The particles are shredded and pumped together with the wastewater by the nonclog impeller. This eliminates clogging at the suction of the pump and allows clear passage to the discharge piping.

Cutter pumps should cut solids to a point where they pass through the system. This can use less energy and cause less wear on the pump, allowing for efficiency and a longer pump life. This approach can work well when maceration is not necessary to complete the work the system is designed to perform.

Cutter pumps are used in locations that commonly clog, including hotels, prisons, restaurants, retail spaces, in wastewater treatment, canal restoration and municipal pump stations. They can also pump manure in livestock farming, process water from slaughterhouses and fruit washing plants, waste on fishing vessels and clinker wastewater from coal bunkers.

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