ABEL EM – Wastewater Treatment Plant in Colorado


The ABEL 404 series easily handle a total flow of 400 GPM against 400 PSI service required for this duty.

At these flow and pressure ranges, ABEL’s technology was the preferred choice and the pumps continue to deliver 30 years later. Given this success and with an eye to reducing operating and maintenance cost, the City focused on other positive displacement pumps in their plant.

The solution

Rotary lobe, progressive cavity, and peristaltic pumps were being used to pump abrasive slurries. However, these pump designs have close-tolerance clearances that promote and accelerate abrasive wear. The plant replaced 20 rotary lobe pumps with 10 ABEL EM electric-diaphragm pumps on primary sludge service. The result was improved maintenance and more efficient operation. Subsequently 2 rotary lobe pumps used for dissolved air-flotation duty were replaced with large ABEL EM pumps resulting in much improved maintenance characteristics. Four more ABEL EM pumps were added for thickened sludge transfer.

ABEL’s EM series pumps are the most efficient of any positive displacement design. The pumps can be run dry indefinitely. There are no tight places that slurry encounters in its path through the pump. Therefore, the ABEL EM pumps are less subject to abrasive wear than any competing positive displacement design.

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