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 particularly suitable 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 sinks, for example (without solid fractions and feces), does not require impellers with free passages because it does not contain elements that could block the flow or wrap around the impeller. Therefore, much more efficient impellers can be used for pumping this 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 and using relatively low-power electric motors.
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, 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 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- and three-phase power supplies 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 (230V) controllers, as well as M131 (400V). For more demanding users and two-pump stations, we offer professional relay- and contactor-based power and control cabinets: SPP and SPS.
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 suitable for liquids with a high solids content (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 transfer water from a pond or ditch to 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 comes standard with a 10-meter power cable. They work perfectly with DRENO coupling feet: DUTY 80 and B4 PN10.
Features
- High-efficiency S-FLOW impeller,
- Exceptionally quiet operation,
- Side flange outlet enables installation on a coupling foot and easy connection of a flexible hose using a clamp or quick coupling,
- Built-in float switch controlling pump operation and protecting it against dry running,
- 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.
