KQDQ（P）E Vertical Intelligent Constant Pressure Variable Frequency Pumps
KQDQ/KQDPE series lightweight vertical intelligent constant pressure variable frequency pump unit adopts technology that combines variable frequency speed regulation and automatic control, and can achieve constant pressure water supply through a connected pressure transmitter. The whole machine is mainly composed of KQDQ/KQDP pump, controller, sensor, pressure tank, outlet pipe, check valve and axial anti-seismic pressure gauge. It has stable performance, high efficiency and energy saving, fully automatic intelligent control, low noise, corrosion resistance, It has the characteristics of compact structure, beautiful appearance, small size and lightweight.
- Functional Characteristics
- Frequency Conversion Controller
- Electric Motor
- Model Meaning
- Operating Conditions
| Main functions | Contents |
| Clock control | The operation and stop of the water pump can be controlled according to the set date and time; |
| High performance digital PID | Constant pressure accuracy ≤0.01Mpa, stabilization time ≤5s, equipment water supply comfort is good |
| Variable current and variable voltage control | It adopts variable voltage control method, which is more energy-saving and comfortable than the usual variable frequency water supply pump unit; |
| Time-sharing frequency control | Different constant voltage values can be set according to different periods to achieve period-by-period voltage control. |
| Sleep holding pressure | At low flow rate at night, the equipment automatically sleeps and relies on the air pressure tank to shut down and maintain pressure. |
| Burst pressure loss protection | When the equipment is running at full load and the operating pressure is still lower than the lower limit of the set pressure, the system automatically shuts down and gives a low-pressure alarm. |
| Non-inductive constant voltage control | If the pressure transmitter fails, the system automatically enters the non-inductive control mode and still maintains variable frequency constant pressure water supply. |
| Electrical protection | With overvoltage, undervoltage, overcurrent, overload, phase loss, short circuit, overheating and other fault alarms and automatic protection |
| Automatic fault reset | Automatically reset recoverable fault alarms such as frequency converters to ensure continuous and stable operation of equipment; |
| Water pump anti-freeze protection | The controller has its own temperature measurement system, which can intermittently control the operation of the water pump when the temperature is too low to prevent the water pump from freezing to death on standby. |
Protection level: IP55
Input power: 3x380V/50Hz
Constant pressure accuracy: 0.01Mpa
Operating temperature: -20C~+60°C (>50°C, for every 1°C increase, the rated output current decreases by 2%);
Altitude: 3000m (for use with derating above 2000m, the rated output current will be reduced by 2% for every 100m of elevation)
Overload level: operating temperature 50°C, 120% rated current, 1min;
Coating grade: Use thickened industrial coating board to meet the harsh environment of 3C4.
Vibration resistance level: 2g
Fully enclosed air-cooled squirrel-cage three-phase asynchronous motor, the motor efficiency is national second or third level energy efficiency.
Protection level: IP55
Insulation grade: F
Rated voltage: 3x380V/50Hz
Medium temperature: normal temperature type -20°C~+70°C
Hot water type +70°C~+105°C
Maximum ambient temperature: +40°C
Maximum operating pressure: 2.5Mpa
Medium pH range: PH5~9
Single-phase AC220 power supply (optional)
1.5kW~2.2kW, single-phase AC220V power supply is sufficient, and there is no need to apply for three-phase industrial power.
Non-inductive constant voltage control
If the pressure transmitter fails, the system automatically enters the non-inductive control mode and still maintains variable frequency constant pressure water supply.
Burst pressure loss protection
The equipment is running at full load, but the operating pressure is still lower than the lower limit of the set pressure. The system will shut down after a delay and alarm for pipe explosion and loss of pressure.
Water pump anti-freeze protection
The controller has its own temperature measurement system, which can intermittently control the operation of the water pump when the temperature is too low to prevent the water pump from freezing to death on standby.
clock control
The operation and stop of the water pump can be controlled according to the set date and time.
High performance digital PID
The constant pressure accuracy is ≤S0.01Mpa, the stabilization time is ≤5s, and the equipment has good water supply comfort.
- Air conditioning systems
- Cooling systems
- Industrial cleaning
- Water treatment (water purification)
- Aquaculture
- Residential water supply systems