The DNB series is used for pumping clear liquids and greywater, as well as for drainage. The special geometry of the S-Flow impellers enables the pumping of liquids containing suspended solids with short fibers, and they perform excellently in wastewater treatment plants.
Characteristics
All main components are made of GG20 cast iron. The double mechanical seal in a back-to-back configuration, located in the oil chamber, guarantees a long product service life.
Advantages of DNB dirty water pumps
Dirty water such as rainwater or greywater from showers, washing machines or washbasins, for example (without solid fractions or fecal matter), does not require free-passage impellers because it does not contain elements that could block the flow or become wrapped around the impeller. Therefore, significantly more efficient impellers can be used for pumping it than Vortex or open-channel impellers. DNB dirty water pumps have been specially designed for high efficiency while maintaining a large passage through the S-Flow impeller channels and using relatively low-power electric motors.
Applications of DNB pumps
Highly efficient S-Flow impellers are used in a wide range of applications, including pumping stations for rainwater, light (grey) wastewater, mechanically pretreated wastewater, process water, slurry, and leachate, as well as wastewater treatment plants. DNB electric dirty water pumps have feet that allow them to stand freely on the ground, as well as a flange for attaching a connection or a DRENO coupling foot elbow of type: A, B or DUTY. The DNB model is available in single-phase and three-phase versions, with or without a built-in float, depending on the customer’s preferred control method.
Control
The DNA wastewater pump is available in four versions combining single-phase or three-phase power supply with control by a built-in float or an external signal. To control DNA pumps (except versions with a built-in float), we recommend the simple M121 controllers (230V), as well as M131 (400V). For more demanding users and two-pump pumping stations, we offer professional relay-contactor power and control panels in the SPP and SPS versions.
Installation methods
Thanks to the DN flange, DNB pumps are often installed on coupling feet in rainwater, pretreated wastewater and process-water pumping stations. With a suitable hose connection (an elbow ending in a plain end), we obtain a portable pump for drainage and for working with liquids containing large amounts of solids (gravel, sand and waste). A DNB wastewater pump can be used without difficulty to water a garden with rainwater, drain a flooded garage or basement, or pump water from a pond or ditch into another tank. DNB pumps have stable feet protruding from the pump body, allowing them to stand on level ground while providing sufficient clearance beneath the body for water intake.
Like every DRENO wastewater pump, the DNB also comes standard with a 10-meter power cable. They work perfectly with DRENO coupling feet: DUTY 80 and B4 PN10.
Features
- Highly efficient S-FLOW impeller,
- Exceptionally quiet operation,
- Side flange outlet enables installation on a coupling foot and easy connection of a flexible hose with a clamp or quick coupling,
- Thermal protection built into the motor winding,
- 10 m H07RNF power cable terminated with a starter box,
- Warranty and post-warranty service,
- 24-month warranty.
