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. Double mechanical seals in a back-to-back configuration, housed in an oil chamber, ensure long product life.
Advantages of DNB dirty water pumps
Dirty water, such as rainwater or greywater from, for example, a shower, washing machine or sink (without solid matter or fecal matter), does not require free-passage impellers because it contains no elements that could block the flow or wrap around the impeller. Therefore, much more efficient impellers can be used to pump it than Vortex or open-channel impellers. DNB dirty water pumps were designed specifically for high efficiency, while maintaining a large free passage through the channels of the S-Flow impeller, and using relatively low-power electric motors.
Uses of DNB pumps
High-efficiency S-Flow impellers are used in a wide range of applications in 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 a surface, as well as a flange for attaching a connection or a DRENO guide rail coupling foot of type: A, B or DUTY. The DNB range includes single-phase and three-phase models, with or without a built-in float switch, depending on the user's preferred control method.
Control
The DNA sewage pump is available in four versions, combining single- and three-phase power with control by a built-in float or an external signal. To control DNA pumps (except versions with a built-in float), we recommend simple controllers M121 (230V), as well as M131 (400V). For more demanding users and dual-pump pumping stations, we offer professional relay-contactor power and control panels in SPP and SPS versions.
Installation methods
Thanks to the DN flange, DNB pumps are often installed on coupling feet in stormwater, pretreated wastewater, and process water pumping stations. With a suitable hose connection (an elbow with a plain end), the pump can be used as a portable dewatering pump and to handle liquids with a high solids content (gravel, sand, debris). The DNB sewage pump can be used 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 housing, allowing them to stand on level ground with sufficient clearance beneath the housing for water intake.
Like every DRENO sewage pump, the DNB comes standard with a 10-meter power cable. It works perfectly with DRENO coupling feet: DUTY 65, and B4 PN10.
Features
- High-efficiency S-FLOW impeller,
- Exceptionally quiet operation,
- Side flanged outlet allows installation on a coupling foot and easy connection of a flexible hose using a hose clamp or quick connector,
- T1T2 thermal protection built into the motor winding, connected to an external control panel,
- 10 m H07RNF power cable with loose wire ends,
- Warranty and post-warranty service,
- 24-month warranty.
