The DNB series is used for pumping 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 major components are made of GG20 cast iron. The double mechanical seal in a back-to-back configuration, located in the oil chamber, ensures long product 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 and fecal matter), does not require impellers with free-flow passages because it does not contain elements that could block the flow or become wrapped around the impeller. Therefore, much more efficient impellers can be used for pumping this type of water 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, using relatively low-power electric motors at the same time.
Applications of DNB pumps
Highly efficient S-Flow impellers are used in a 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- and three-phase versions, with or without a built-in float, depending on the control method preferred by the customer.
Control
The DNA wastewater pump is available in four versions combining single- or three-phase power supply with control by a built-in float or an external signal. To control DNA pumps, except for 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 stations, we offer professional relay-and-contactor power and control cabinets, the SPP and SPS models.
Installation methods
Thanks to the DN flange, DNB pumps are often installed on coupling feet in rainwater, pretreated wastewater, and process-water pumping stations. When fitted with a suitable hose connection (an elbow terminating in a plain end), they become portable drainage pumps for handling liquids with a high content of solids (gravel, sand, and 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 a level surface 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 flanged outlet enables installation on a coupling foot and easy connection of a flexible hose with a hose clamp or quick coupling,
- Thermal protection built into the motor winding,
- 10 m H07RNF power cable terminated with free leads,
- Warranty and post-warranty service,
- 24-month warranty.
