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, housed in an oil chamber, ensures a long product life.
Advantages of DNB dirty water pumps
Dirty water such as rainwater or greywater e.g. from showers, washing machines or sinks (without solid matter or feces) does not require impellers with free passages, as it contains no elements that could block the flow or become wrapped around the impeller. Therefore, we can use much more efficient impellers than Vortex or open-channel impellers to pump it. DNB dirty water pumps have been specially designed for high efficiency, with a large passage through the S-Flow impeller channels, while using relatively low-power electric motors.
DNB pump applications
Highly efficient S-Flow impellers are used in a range of applications, including pumping stations for rainwater, light (grey) wastewater, mechanically pre-treated wastewater, process water, slurry, leachate and wastewater treatment plants. DNB electric pumps for dirty water 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 user's preferred control method.
Control
The DNA sewage pump is available in four versions combining single- and 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 (230V) and M131 (400V) controllers. For more demanding users and twin-pump pumping stations, we offer professional relay-contactor power and control panels, models SPP and SPS.
Installation methods
Thanks to the DN flange, DNB pumps are often installed on coupling feet in rainwater, pre-treated wastewater and process water pumping stations. With a suitable hose connection (an elbow with a plain end), you get a portable pump for drainage and for handling liquids with a high solids content (gravel, sand, rubbish). The DNB sewage pump can be used without any problem to water the garden with rainwater, drain a flooded garage or basement, and pump water from a pond or ditch to another tank. DNB pumps have stable feet protruding from the pump body, allowing them to stand on level ground with sufficient clearance beneath the body for water intake.
Like every DRENO sewage pump, the DNB also comes standard with a 10-metre power cable. They work perfectly with DRENO coupling feet: DUTY 80 and B4 PN10.
Features
- High-efficiency S-FLOW impeller,
- Exceptionally quiet operation,
- The side flange outlet allows installation on a coupling foot and easy connection of a flexible hose using a clamp or quick coupling,
- Thermal protection built into the motor winding,
- 10 m H07RNF power cable with bare wire ends,
- Warranty and post-warranty service,
- 24-month warranty.
