Constant Pressure Water Supply System

Working principle

The constant pressure variable frequency pump group regulates the speed of the drive motor through the built-in inverter, so as to control the output flow of the pump, so that the pressure in the system is maintained at a set constant value. The working process is roughly as follows:

• Sensor detection: Real-time detection of pressure signals in the system through built-in or external pressure sensors.
• Signal processing: The pressure signal collected by the sensor is transmitted to the inverter for signal processing and algorithm calculation.
• Frequency regulation: The frequency converter adjusts the speed of the motor according to the calculation results, so as to control the output flow of the pump, so that the system pressure reaches the set value.
• Feedback control: The inverter receives the feedback signal from the sensor, compares it with the set value, and continues to adjust the frequency and driving force as needed to keep the system pressure constant.

Main feature

• Energy saving and consumption reduction: the constant pressure variable frequency pump group can adjust the speed of the motor according to the actual needs, avoiding the problem of wasting energy in the low load state of the traditional pump, thus achieving the effect of energy saving and consumption reduction.
• Water pressure stability: Through the precise regulation of the inverter, the constant pressure variable frequency pump group can ensure the stability of the system pressure, avoiding the problems caused by the traditional water pump due to water pressure fluctuations.
• Long equipment life: Due to the precise control of the motor speed, the constant pressure variable frequency pump group avoids the problem of frequent start and stop of the motor in high load and low load state, thus extending the life of the equipment.
• Simple maintenance: The maintenance of the constant pressure variable frequency pump group is simpler than that of the traditional pump, and only needs to regularly check the working status of key components such as the inverter and pressure sensor.

Application field

• Construction field: Constant pressure variable frequency pump sets are often used in high-rise water supply, residential pressurized water supply and other scenarios to ensure that the water pressure of each floor is stable to meet the needs of residents.
• Industrial production: In industrial production, constant pressure variable frequency pump sets are mainly used for boiler water supply, circulating water supply in the process, etc., to ensure stable water pressure and flow in the production process.
• Agricultural irrigation: In the field of agricultural irrigation, the application of constant pressure variable frequency pump group is mainly reflected in the water-saving irrigation system such as drip irrigation and spray irrigation, which realizes the uniform distribution of irrigation water through precise control and improves irrigation efficiency.

Selection principle

When choosing a constant pressure variable frequency pump set, the following factors need to be considered:

1. Flow and head demand: according to the head, flow and its change law required by the project, determine the appropriate pump type, model and number.
2. Pump performance: Choose a pump with good performance, high efficiency and a wide range of use, and ensure that it has strong adaptability and guarantee with the flow and head changes required by the project.
3. Operating costs: The selected pump should have a high average plant efficiency, low energy consumption and operating costs during long-term operation.
4. Maintenance and management: The selected pump should be easy to construct, easy to operate, manage and maintain.