Key Features and Characteristics
1. Design and Application
Application Scope: Suitable for pumping sewage, surface water, groundwater, and water containing abrasive impurities; particularly ideal for mining areas, construction sites, and underground garages.
Installation: Can be installed as a standalone submersible unit or integrated into a multi-pump system.
Impeller Design: Features enclosed or semi-open impellers (semi-open for DWK.O; enclosed for DWK.E/DWK.H).
2. Materials and Construction
Wear-resistant Materials: Constructed from wear-resistant materials such as cast iron and high-chrome stainless steel to ensure long-term, reliable operation.
Shaft Sealing System:
DWK.O: Double mechanical seal (SiC-SiC) located in the oil chamber.
DWK.E/DWK.H: Triple sealing system (double mechanical seal plus an additional lip seal).
Cooling System: Heat dissipation is facilitated by a cooling jacket that maintains the water level around the motor.
3. Motor Characteristics
Motor Type: Totally enclosed, waterproof motor.
Protection Class: IP68.
Insulation Class: Class F (155°C).
Temperature Class: Class F (105°C).
Number of Poles: 2-pole motor.
Power Range: 0.75 kW to 90.0 kW.
4. Solids Handling Capacity (Passage Size)
DWK.O/DWK.E: 10–20 mm
DWK.H: 7 mm mm (Designed specifically for high-head applications)
Model-specific features
DWK.O Series Features
Waterproof cable entry prevents water ingress into the motor
Sensors require no additional cabling
Compact top-discharge design
High-chrome stainless steel impeller and ductile iron suction cover (R-type)
Double mechanical seal (SiC-SiC) suitable for heavy-duty conditions
DWK.E Series Features
Triple cable entry system (rubber ring + rubber diaphragm + epoxy resin potting)
Cooling jacket maintains water level above the suction strainer to aid heat dissipation
Stainless steel strainer for enhanced corrosion resistance (R-type)
High-efficiency motor ensures stable performance
DWK.H Series Features
Designed specifically for high-head applications (dual-impeller structure)
Triple cable entry system
Two-stage cast iron impellers deliver superior performance
Standard flange discharge connection
Protection and control functions
Thermal protection devices:
PTO (external control via power cable signal wires)
Klixon MW circuit breaker (automatic reset function)
Klixon 17AM (control via power cable signal wires)
Leakage monitoring:
Standard leakage sensor monitors for liquid ingress into the motor chamber (excluding some low-power models)
VFD compatibility:
DWK.E and DWK.H support VFD operation
DWK.O does not support VFD control
Controller options:
LC 231 level controller (with motor protection functions)
LC 241 Level Controller (Customizable Cabinet Solutions)
Performance Specifications
Maximum particle handling capacity: 6–13 mm (depending on model)
pH range: 4–10
Liquid temperature range: 0–40°C
Maximum installation depth: 25 m
Protection rating: IP68
Customization Options
Special motor windings (19 kW and 22 kW models only)
Special voltage options
Various cable lengths (standard 10 m; optional 15/20/25/30 m)
Various discharge connection types (flange/hose/threaded)
Special material versions (Stainless Steel 304/316/316L, etc.)