DERAGGER Intelligent Efficiency

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What causes ragging? 

Gradual pump ragging is typically caused by the build-up of wipes and other nonwoven products, often marketed as ‘flushable’, and ‘safe for sewers’.  The presence of FOG (Fats, Oils & Grease) in the system can compound this problem.

In addition, many people in the United States treat a toilet like a trash can, with some of the most problematic sites being those that service Elderly Care Facilities, Prisons, Schools, and Hotels.

The US is responsible for more than half of the global wipe market and is predicted to keep growing well into the future.  Coupled with reduced water usage and efficient fixtures, the concentration of fibrous material in the wastewater system has increased exponentially in the past two decades.

This costs utilities Hundreds of Millions of dollars in inefficient pumping.

Many utilities have tried to sue the wipes manufacturers for the millions in damage to their equipment but haven’t been successful as the wipes companies sponsored a forensic analysis of a clogged pump and identified that 93% of the fibrous material found in a clogged pump in New York was labelled by the manufacturer as “NOT FLUSHABLE”, whereas only 7% were deemed flushable.  Their position is that people are flushing material that should not be flushed, and that is not their fault.

What is the impact of clogs? 

Often, the most obvious burden is that an employee of the utility must disassemble and manually clear rags and debris from the pump and put it back in service.  This waste of time may seem like the costliest issue associated with ragged or partially ragged pumps, but it’s just the tip of the iceberg…

Pumps most commonly clog by catching a single wipe on the leading edge of the impeller vane, which then becomes a high-friction surface area to continue catching rags and build a full obstruction gradually over time (all the while costing the owner more money to operate the pump due to decreased flow, increased current draw, and seal-destroying vibration). 

Rags also can wedge themselves between the wear rings or above the impeller near the seal, in the eye of the impeller, or even pack themselves into coarse casting reliefs in the volute, effectively decreasing usable space within the volute and drastically altering hydraulics. 

In dry-pit pumps we most frequently see rag build-up in the suction pipe or elbow, often due to operation at reduced speed on a Variable Frequency Drive.  This can increase cavitation by “starving” the suction (decreasing NPSHa), and also can blind off a pump if a large enough “slug” forms and then is sucked up all at once.

The Solution

DERAGGER by Clearwater Controls elminates ragging. The key feature of the DERAGGER+ low-voltage, electronic pump management system is real-time pump monitoring. This enables the patented technology in the DERAGGER+ to identify and eliminate potential pump clogs, monitor the long-term condition of the pumps and reduce wear and tear caused by unbalanced loads.

By always maintaining a clean impeller, the DERAGGER+ ends the time-consuming and costly necessity of manually lifting pumps, thus eliminating downtime and other costs associated with pump ragging.

The reduction of environmental incidents, together with less electricity consumption, results in a lowered environmental impact and carbon footprint.

The End of Ragging

  • The DERAGGER+ anti-ragging capability will eradicate pump clogs in wastewater pumps
  • Wealth of diagnostic information and pump data
  • Typical payback in months
  • Reduces operational callout costs
  • Improves electrical efficiency by up to 48%
  • Reduces pollution incidents
  • Minimal interruption to ‘live’ sites
  • No new kiosks, replacement panels or construction works
  • Simple plug and play to any starter type
  • Includes multiple Apps to help protect your assets