Overview
Grundfos DWK and DPK are submersible pumps designed for dewatering and drainage applications. The cast-iron construction and the hydraulic design contribute durability and high efficiency.
The differences between the DWK and DPK pump ranges lie in the discharge arrangement and the installation type.
The DWK is designed with a top discharge pipe and suction strainer, and is thus more suitable for temporary installation, whereas the DPK has a side discharge and a ring-stand or auto coupling (as accessories), and is suitable for permanent installations.
General description
To ensure reliable and optimum operation, Grundfos
drainage pumps, type DPK, are designed with two
types of impeller:
• 0.75 – 15 kW models have semi-open impeller
• 19 and 22 kW models have closed impeller.
DPK pumps are used for removal of surface and
underground water in small and medium systems
Applications
DWK/DPK are excellent pumps for dewatering and draining applications. The combination of compact design with high-pressure capability makes the pumps suitable for use in pits, whether for temporary or fixed installation. The installation design options provide the flexibility needed to cover many needs. Applications include:
- Construction sites
- Excavations
- Tunnels
- Fish ponds
- Drainage pits.
Operating conditions
The DPK pump range is suitable for two operating
modes:
• continuous, submerged operation, S1, with min.
liquid level above the pump
• intermittent operation, S3, with the pump partly
submerged.
See fig. 1
pH value
DPK pumps in permanent installations can cope with
pH values ranging from 4 to 10.
Liquid temperature
0 °C to +40 °C.
Density of pumped liquid
Maximum 1000 kg/m3.
In the case of higher densities, contact Grundfos.
Installation depth
Maximum 25 metres below liquid level.
Operating pattern
Maximum 30 starts per hour.
Features and benefits
- Durability
- High efficiency
- Installation flexibility
- High-pressure capabilities, cost-effectiveness.
