Key Features & Advantages (Intelligent Control System)
The GJ series distinguishes itself with its built-in electronic intelligence, offering multiple layers of protection and automated control:
- Intelligent Dual Control: The system can automatically start and stop the pump based on real-time pressure or flow signals, maintaining consistent water pressure without manual intervention. It intelligently manages the pump’s operation cycle.
- Dry-Running Protection: A critical safety feature. The control system detects a lack of water (dry running condition) and will automatically shut off the pump to prevent overheating and seal damage, significantly extending the pump’s life.
- Overheating Protection: Embedded thermal sensors monitor the motor temperature. If an abnormal overheating condition occurs, the system will cut power to prevent motor burnout.
- Anti-Rust Protection: The design and materials used help protect internal components from corrosion, enhancing durability for water supply applications.
- Delay Start Function: Introduces a brief delay upon activation before the pump starts. This prevents rapid cycling (short cycling) if there are minor pressure fluctuations, reducing wear on the motor and contacts.
- No Frequent Start-Stop: The control logic is optimized to minimize unnecessary on/off cycles, promoting smoother operation and longer component lifespan.
Model Number Instruction
Understanding the model code reveals the pump’s key performance characteristics:
- GJ: Intelligent Self-Priming Pump
- First two digits (e.g., 60, 70, 80, 90): Impeller Specification (related to outer diameter and performance curve).
- Last digits (e.g., 200, 300, 400): Motor Power (Watt).
- AS: Suffix denotes “Stainless Steel” model variant.
Example: GJ60-200= Intelligent self-priming pump with 60-series impeller, 200W (0.2kW) power.
Technical Specifications
Standard GJ Series Models
| No. | Model | Voltage (V) | Max. Flow (m³/h) | Max. Head (m) | Rated Flow (m³/h) | Rated Head (m) | Power (kW) | Pipe Dia. (mm) |
|---|---|---|---|---|---|---|---|---|
| 1 | GJ60-200 | 220 | 2 | 25 | 1 | 12 | 0.2 | 25 |
| 2 | GJ60-300 | 220 | 2 | 30 | 1 | 13.5 | 0.3 | 25 |
| 3 | GJ60-400 | 220 | 2 | 35 | 1 | 15 | 0.4 | 25 |
| 4 | GJ70-600 | 220 | 3 | 40 | 1.5 | 22 | 0.6 | 25 |
| 5 | GJ80-800 | 220 | 3.5 | 45 | 1.5 | 28 | 0.8 | 25 |
| 6 | GJ90-1100 | 220 | 6 | 50 | 2.5 | 30 | 1.1 | 25 |
| 7 | GJ90-1500 | 220 | 6.5 | 60 | 3 | 35 | 1.5 | 25 |
| 8 | GJ90-1100 (Large Tank) | 220 | 6 | 50 | 2.5 | 30 | 1.1 | 25 |
| 9 | GJ90-1500 (Large Tank) | 220 | 6.5 | 60 | 3 | 35 | 1.5 | 25 |
GJ304 Stainless Steel Automatic Intelligent Pump Models
| No. | Model | Voltage (V) | Max. Flow (m³/h) | Max. Head (m) | Rated Flow (m³/h) | Rated Head (m) | Power (kW) | Pipe Dia. (mm) |
|---|---|---|---|---|---|---|---|---|
| 1 | GJ60-200AS | 220 | 2 | 25 | 1 | 12 | 0.2 | 25 |
| 2 | GJ60-300AS | 220 | 2 | 30 | 1 | 13.5 | 0.3 | 25 |
| 3 | GJ60-400AS | 220 | 2 | 35 | 1 | 15 | 0.4 | 25 |
| 4 | GJ70-600AS | 220 | 3 | 40 | 1.5 | 22 | 0.6 | 25 |
| 5 | GJ80-800AS | 220 | 3.5 | 45 | 1.5 | 28 | 0.8 | 25 |
Applications
- Automatic household water supply and pressure boosting for villas, apartments, and residential buildings.
- Domestic hot water circulation systems.
- Small-scale irrigation and garden water supply.
- Water transfer and pressurization in shops, restaurants, and small commercial establishments.
- As a replacement for traditional, non-automatic water pressure pumps.
Why Choose DONGTAO GJ Intelligent Self-Priming Pump Series?
- Worry-Free Automation: The intelligent controller handles start/stop, dry-run protection, and overload protection, making operation simple and safe.
- Equipment Protection: Multiple built-in safeguards prevent damage from dry running, overheating, and frequent cycling, reducing maintenance costs and downtime.
- Energy Efficient: Operates only when needed, saving energy compared to constantly running pumps.
- Convenient Installation: Self-priming capability allows for flexible installation (not strictly required below water level) and easy setup.
- Choice of Materials: Available in standard and GJ304 stainless steel (AS series) versions for applications requiring higher corrosion resistance.
Contact Us for Smart Water Solutions
To determine the ideal GJ model for your specific pressure and flow requirements, or to learn more about the intelligent control features, please contact our sales team for a consultation and quotation.
