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.
Characteristics
All main components are made of GG20 cast iron. The double mechanical seal in a back-to-back configuration, located in an oil chamber, guarantees a long product service life.
Advantages of DNB dirty water pumps
Dirty water such as rainwater or greywater from a shower, washing machine or washbasin, 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 simultaneously using relatively low-power electric motors.
Applications of DNB pumps
Highly efficient S-Flow impellers are used in a range of applications in 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 mounting a connection or a DRENO coupling foot attachment 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 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 pumping stations, we offer professional relay-contactor power and control panels, 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 ending in a plain end), they become portable drainage pumps for working with liquids containing large amounts of solids (gravel, sand and waste). 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 protruding 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 flange outlet enables installation on a coupling foot and easy connection of a flexible hose with a clamp or quick coupling,
- T1T2 thermal protection built into the motor winding, connected to an external control panel,
- 10 m H07RNF power cable terminated with free leads,
- Warranty and post-warranty service,
- 24-month warranty.
