The DNB series is used for pumping and draining clear liquids and greywater. The special geometry of the S-Flow impellers allows them to pump liquids containing suspended solids with short fibers, making them ideal for wastewater treatment plants.
Specifications
All major 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 life.
Advantages of DNB Dirty Water Pumps
Dirty water such as rainwater or greywater from a shower, washing machine, or sink, for example (without solids or fecal matter), does not require impellers with free passages, as it contains no elements that could block the flow or wrap 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 large passages through the channels of the S-Flow impeller, while using relatively low-power electric motors.
DNB Pump Applications
High-efficiency 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 guide rail coupling foot 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 sewage pump is available in four versions combining single- and three-phase power with control by a built-in float switch or an external signal. To control DNA pumps (except versions with a built-in float switch), we recommend the simple M121 controllers M121 (230V), as well as M131 (400V). For more demanding users and two-pump pumping stations, we offer professional power and control panels with relay-contactor control SPP and SPS.
Installation methods
Thanks to the DN flange, DNB pumps are often installed on coupling feet in pumping stations for stormwater, pretreated sewage, and process water. When used with a suitable hose connection (an elbow with a plain end), they become portable drainage pumps suitable for liquids with a high solids content (gravel, sand, debris). The DNB sewage 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 sturdy 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 sewage pump, the DNB also comes with a 10-meter power cable as standard. It works perfectly with DRENO coupling feet: DUTY 65, and B4 PN10.
Features
- High-efficiency S-FLOW impeller,
- Exceptionally quiet operation,
- The side flanged outlet allows installation on a coupling foot and easy connection of a flexible hose with a clamp or quick coupling,
- Thermal protection built into the motor winding,
- 10 m H07RNF power cable with bare ends,
- Warranty and post-warranty service,
- 24-month warranty.
