The DNB series is designed 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 the oil chamber, guarantees 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 particles and faecal matter), does not require impellers with free passages because it contains no elements that could block or wrap around the flow path. 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 and using relatively low-power electric motors.
Applications of DNB pumps
Highly efficient S-Flow impellers are used in a range of applications, including rainwater pumping stations, 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 the following types: A, B or DUTY. The DNB model is available in single- and three-phase versions, with or without a built-in float switch, depending on the user'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 switch or an external signal. For controlling DNA pumps (except versions with a built-in float switch), we recommend the simple M121 controllers (230V), as well as M131 (400V). For more demanding users and two-pump pumping stations, we offer professional relay-contactor power and control panels: SPP and SPS.
Installation methods
Thanks to the DN flange, DNB pumps are commonly 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 drainage pumps suitable 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 comes standard with a 10-metre power cable. They work perfectly with DRENO coupling feet: DUTY 65, and B4 PN10.
Features
- High-efficiency 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,
- 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 with free terminals,
- Warranty and post-warranty service,
- 24-month warranty.
