Pumps for Desludging Highly Abrasive Sewage Water

Reduce operating costs by changing from centrifugal pump to rotary lobe pump

Do you want to reliably de-sludge your sewage water produced during water jet cutting, and are you tired of the short service lives of centrifugal pumps? As a global specialist in complex fluid management, NETZSCH Pumps & Systems offers solutions for pumping industrial sewage water individually tailored to your requirements.

We will show you how to reduce your operating costs sustainably by replacing your submersible centrifugal pump with a robust and powerful TORNADO® T.Envi® rotary lobe pump.

Individual Consulting

Get a personalized offer!

contact now
Water Jet Cutting, NETZSCH, Pumps, Systems

Sewage water pumps: Robust, long service life and easy maintenance

Sewage water occurs in almost all industrial operations and processes and is one of the most complex forms of wastewater. This is due, in particular, to the demanding composition of the pumps and conveying systems. The contents range from dissolved and undissolved, inorganic and organic substances to acidic and basic media, oils, and poisons. For example, the wastewater from waterjet cutting contains a high proportion of sand and is, therefore, particularly abrasive. This is because an abrasive cutting aid is added to the water. This is often fine garnet sand. After the cutting process, however, the water-sand mixture must be separated again so that the sand can be disposed of. Unique pumps are needed to remove and separate the sludge from the water. The focus of sewage water pumps is on robust and durable construction and high operational reliability. But easy maintenance also plays a significant role. 

Sewage pumps: Replace centrifugal pump - reduce service times

As helpful as the sand is as a cutting aid, it causes effort when it comes to disposal. That is why one manufacturer of waterjet cutting systems offers you an automatic disposal system for your machines. The sewage water pump transports the water-sand mixture to a cyclone, which separates the solids from the water by centrifugal force and thus facilitates disposal. Since conventional centrifugal pumps wear out very quickly due to the abrasive medium, the company relies on the particularly robust and maintenance-friendly TORNADO® T.Envi® rotary lobe pumps from NETZSCH. Even after twice the operating time, the machine’s condition is as good as new compared to centrifugal pumps. In addition, the innovative FSIP® design of the T.Envi® rotary lobe pump makes maintenance quick and easy. This sustainably reduces your service times and costs. 


cubic metres per hour can be pumped

Please accept Marketing Cookies to see that Video.

The compact TORNADO® T.Envi® rotary lobe pumps from are optimally adapted to your individual requirements in environmental and biogas technology.

How to double your service life when pumping sewage water

Despite the high abrasiveness of the sewage water, the TORNADO® T.Envi® rotary lobe pump offers you a particularly long service life. On the one hand, this is due to the robust and durable design and, on the other hand, to the material reversal. While other pump manufacturers usually have elastomer pistons rotating in a metal housing, this pump uses steel rotary pistons. The inside of the pump is lined with a rubber insert. This gives you a pumping capacity of 35 m³/h when pumping industrial sewage water.

Even after pumping more than 90 tons of abrasive water containing sand, the pump chamber has almost no wear. Both the insert and the mechanical seal are in perfect condition. The same applies to the shaft seals, including the contact pressure and lubrication. Only the rotary pistons show slight signs of wear at the tips. However, since the gap dimensions still correspond to the measurements at the delivery time, the delivery capacity loss is shallow. You can quickly compensate for this by minimally adjusting the speed and thus continue to use the sewage water pump effectively. By replacing your centrifugal pump with a TORNADO® T.Envi® rotary lobe pump, you can more than double the service life and sustainably reduce operating costs.

TORNADO® T.Envi® rotary lobe pump

  • Medium: Sewage water (water-sand mixture)
  • Pressure: 3 bar
  • Flow rate: 35 m³/h
TORNADO® T.Envi® Rotary Lobe Pump, NETZSCH, Pumps, Systems