Pulp and Paper ― Paper Mill Main Effluent/Waste Water Pit Pumps

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  • Increased customer satisfaction
  • Improved, dependable performance
  • Reduction on number of failures
  • Significant cost savings


Pulp and paper mill with up to 1,450,000 TPY capacity


Pulp and paper mill main effluent/waste water pit pumps


The end user contacted Argo International to help bringing their 1947 vintage Worthington / Flowserve main effluent column pit pumps up to current design and technology. These 8 pumps are critical for the mill and process approximately 70 million gallons of waste water per day to be treated and reused or returned to the Columbia River.


The 69-year-old Effluent Column Pumps operate in extremely challenging service conditions, and over the years, have experienced significant damage and multiple failures at the bearings, sleeves, wear surfaces and shafts, and issues included cavitation, vibration, high radial loads, cyclic loading, corrosion and erosion, ultimately leading to costly repeated downtime.


Before - Effluent water pump as received from the paper mill. 

Argo Solution

Argo International partnered up with Flowserve Pump Company, and proposed a complete rebuild and upgrade utilizing Flowserve’s latest engineering designs, technology and materials.

Argo International’s team of experts, along with Flowserve’s Quick Response Repair Center. formulated a solution to upgrade most materials for these pumps including non-metallic shaft bearings, high strength shaft material, thru-hardened wear rings, optimized impeller trim and a general realignment of all register fits for this large column pump.

The first refurbished pump has been in operation now for over a year and it is still running smooth without issue. 


After - Effluent water pump after rebuilt and upgrade.

Download the Pulp and Paper ― Paper Mill Main Effluent/Waste Water Pit Pumps Success Story here:



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