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Working Principle
Before startup, the pump casing must be filled with liquid (or retain residual liquid). When activated, the high-speed rotating impeller forces liquid from the vane channels into the volute, creating a vacuum at the inlet. This vacuum opens the suction check valve, allowing air from the suction pipe to enter the pump. The air is then mixed with liquid and expelled through the impeller’s outer channels, achieving continuous self-priming and stable flow.
Key Advantages
Rapid self-priming—efficient air-liquid handling.
Versatile material options—suitable for diverse fluids.
Energy-saving & durable—optimized hydraulic design minimizes wear.
Technical Parameters
Maximum fluid temperature up to +40℃.
Maximum sand content: 0.25%
Motor and Pump: Rewindable motor
Three-phase: 380V-415V/50Hz
Single-phase: 220V-240V/50Hz
Options on request: Special mechanical seal
Other voltages or frequency 60 Hz
Performance Charter
Model Optional
Performance Data 50Hz | ||||||||||||||
MODEL | P₂ | DELIVERY n≈2850 r/min | ||||||||||||
1~ | 3~ | KW | HP | m³/h | 0 | 1.2 | 2.4 | 4.8 | 7.2 | 9.0 | 10.8 | 12.6 | 14.4 | 16.2 |
Q I/min | 0 | 20 | 40 | 60 | 120 | 150 | 180 | 210 | 240 | 270 | ||||
1DK-15 | 一 | 0.37 | 0.5 | H(m) | 15 | 14 | 10 | 5 | 一 | 一 | 一 | 一 | 一 | 一 |
1DK-20 | 一 | 0.55 | 0.75 | 20 | 19 | 18 | 17 | 16.5 | 14.4 | 11.3 | 6 | 一 | 一 | |
1.5DK-20 | 1.5DK-20 | 0.75 | 1.0 | 20 | 19.2 | 18.3 | 17.5 | 16.8 | 15 | 11.5 | 12.6 | 9 | 一 | |
2DK-16 | 2DK-16 | 1.1 | 1.5 | 16 | 15.5 | 15 | 14.5 | 14 | 13 | 11.5 | 9.8 | 7.6 | 4.5 | |
2DK-20 | 2DK-20 | 1.5 | 2.2 | 21 | 20.5 | 20 | 19.5 | 19 | 18 | 16.8 | 15.2 | 13.4 | 10 | |
Product Uses
The DK Series centrifugal pump is widely used in:
Domestic & Residential Applications
Livestock farms water supply
Household water systems
Residential communities water distribution
Drinking water pressurization
High-rise building roof tank pressurization
Hotels and commercial buildings water supply
Private garden villas water systems
Sauna and spa centers
Hotel centralized water supply
SPA and hydrotherapy facilities
Industrial & Agricultural Applications
Factory domestic water pipeline boosting
Water circulation systems
Deep well water extraction
Cooling water circulation (detailed systems)
Firefighting water supply
Laboratory water systems
Well water extraction and municipal water pressurization
Garden irrigation
Farmland irrigation
Greenhouse vegetable cultivation water supply
This versatile pump provides efficient and reliable solutions for diverse water supply and pressure boosting requirements across multiple sectors
Safety and Operating Instructions
Electrical Safety
To prevent electric shock, install a leakage circuit breaker or ground fault protector and ensure proper grounding.
Voltage Requirements
The operating voltage must be within +5% to -12% of the rated voltage; otherwise, the motor may overheat or burn out.
If the power source is far from the pump, use thicker power cables to prevent voltage drop and operational failure.
Startup Check
Turn on the power and let the pump run idle for about 2 minutes to verify proper startup, operation, and correct rotation direction.
Installation Guidelines
Secure the pump firmly and connect the inlet to the foot valve using steel pipes or reinforced hose (avoid overly soft tubing to prevent collapse).
The foot valve must be vertical and positioned at least 30 cm above the bottom to avoid sucking in silt.
For first-time operation, fill the storage tank completely. If the pump fails to discharge water within seconds, repeat priming. Later uses do not need refilling.
Operational Precautions
Keep the motor dry and monitor water levels to ensure the foot valve remains submerged.
In temperatures below 4°C (39°F), implement anti-freezing measures to prevent pump casing damage.
Storage Maintenance
If the pump won’t be used for an extended period:
Drain all residual water (including stored water in self-priming/auto pumps).
Clean and dry key components, apply anti-rust oil, and store in a ventilated, dry place
Note: Follow these steps to ensure safe, efficient, and long-lasting pump performance.
