The DNB series is used for pumping and draining clear liquids and greywater. The special geometry of the S-Flow impellers enables the pumping of liquids containing suspended solids with short fibers, making them ideal for 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 solids or fecal matter), does not require impellers with large free passages because it does not contain elements that could block the flow or wrap around the impeller. Therefore, much more efficient impellers than Vortex or open-channel impellers can be used for pumping it. DNB dirty-water pumps have been specifically designed for high efficiency while maintaining a large passage through the S-Flow impeller channels and using relatively low electric motor power.
Applications of DNB pumps
Highly efficient S-Flow impellers are used in a wide range of applications, including rainwater pumping stations, light (grey) wastewater, mechanically pretreated wastewater, process water, slurry, leachate , and 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 bracket of type: A, B or DUTY. The DNB model is available in single- 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- and three-phase power supplies with control by a built-in float or an external signal. For controlling DNA pumps, except for versions with a built-in float, we recommend the simple M121 (230V) controllers, as well as the M131 (400V). For more demanding users and two-pump stations, we offer professional relay-contactor power and control cabinets in SPP and SPS versions.
Installation methods
Thanks to the DN flange, DNB pumps are commonly 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), they become portable dewatering pumps for working with liquids containing high concentrations of solids (gravel, sand, debris). 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 extending 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 65 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 hose clamp or quick coupling,
- Built-in float switch controls pump operation and protects it against dry running,
- Thermal protection built into the motor winding,
- 10 m H07RNF power cable terminated with a Schuko plug,
- Warranty and post-warranty service,
- 24-month warranty.
