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 fibres, making them ideal for wastewater treatment plants.
Features
All major components are made of GG20 cast iron. The double mechanical seal in a back-to-back configuration, installed in an oil chamber, guarantees a long product lifespan.
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 faeces), does not require impellers with free-flow passages because it contains no elements that could block the flow or become entangled in it. Therefore, much more efficient impellers than Vortex or open-channel impellers can be used for pumping it. DNB dirty water pumps have been specially designed for high efficiency while maintaining a large passage through the S-Flow impeller channels, while 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 pre-treated 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 attachment 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 switch, 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 with control by a built-in float switch or an external signal. To control DNA pumps, except for versions with a built-in float switch, we recommend the simple M121 (230V) controllers, as well as M131 (400V). For more demanding users and two-pump pumping stations, we offer professional relay-and-contactor power and control cabinets, the 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 terminating in a plain end), they become portable dewatering pumps for 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 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-metre power cable. They work perfectly with DRENO coupling feet: DUTY 65, 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 using a hose 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 Schuko plug,
- Warranty and post-warranty service,
- 24-month warranty.
