Henan Guoqing Environmental Protection Technology Co., Ltd
Constant Pressure Water Supply Device
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The Variable-Frequency Constant Pressure Water Supply Device refers to a water supply method in which the outlet pressure remains constant even when the water consumption in the distribution network fluctuates. It comprises four main components: pumps, an air pressure tank, piping, and an electrical control system. Its notable advantages include the elimination of the need to construct a water tower, low capital investment, minimal land occupation, flexible layout, and rapid commissioning.
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Product Overview
The Variable-Frequency Constant Pressure Water Supply Device refers to a water supply method in which the outlet pressure remains constant even when the water demand in the distribution network fluctuates. It comprises four main components: pumps, an air pressure tank, pipelines, and an electrical control system. Its notable advantages include the elimination of the need to construct a water tower, low capital investment, minimal land occupation, flexible layout, and rapid commissioning.
The variable-frequency constant-pressure water supply system provides stepless speed control for the pump motor. By continuously monitoring and processing data on water consumption and pressure fluctuations, it automatically adjusts the pump speed to maintain a stable water pressure, thereby meeting user demand. This variable-frequency constant-pressure system is currently an advanced, energy-efficient solution. Compared with traditional methods such as water towers, elevated tanks, and tankless systems, it requires lower capital investment, offers reduced operating costs, and delivers reliable performance.
Application areas
① Applicable to newly constructed, expanded, or renovated residential buildings, residential communities, office buildings, and the like;
② Used in hotels, guesthouses, restaurants, and similar establishments;
③ Suitable for applications with high water consumption, such as schools, military units, government offices, and collective dormitories;
④ For use in public venues such as shopping malls, convention centers, sports stadiums, and public bathhouses;
⑤ Fire-fighting water used when the pressure of the municipal water supply is insufficient to meet the water demand of fire hydrant systems or automatic sprinkler systems, among others;
⑥ Used for large‑flow centralized water supply in large factories, pressurized pumping stations, development zones, and similar applications;
⑦ Used for production and domestic water supply in industrial and mining enterprises.Process Principle
The variable-frequency constant-pressure water supply system uses the water pressure in the distribution network as its setpoint. By adjusting the output frequency of the microprocessor‑controlled inverter, it automatically regulates the speed of the pump motor, thereby achieving closed-loop control of the network pressure and maintaining the system at the desired pressure level. When water demand increases, the frequency rises, the pump speed accelerates, and the flow rate correspondingly increases; when demand decreases, the frequency drops, the pump speed slows down, and the flow rate diminishes accordingly. This approach not only ensures that users’ requirements for both pressure and flow are met but also enhances overall water‑supply efficiency.
Product Features
- Constant-pressure water supply can automatically maintain a stable pressure around the clock and, based on pressure signals, automatically start the standby pump, providing stepless pressure adjustment and high-quality water delivery.
- It initiates smooth operation, reduces impact on the motor and pump, extends the service life of both, and prevents water hammer—a common issue in conventional water supply systems.
- It employs a variable-frequency, constant-pressure water supply system with comprehensive protection features, ensuring reliable operation and providing safeguards against undervoltage, overvoltage, overcurrent, and overheating.
- The system configuration enables fully automatic timed water supply and unattended, automated operation. The control system features fault alarm and display functions, supports switching between line-frequency and variable-frequency operation, and provides emergency water supply.
- The system adjusts the pump speed in response to changes in water consumption, ensuring the pump always operates within its high-efficiency range. When the system is at zero flow, the unit enters a sleep mode, with the pump shut off, and resumes operation only when flow increases, delivering significant energy savings—23% to 55% greater than those achieved by constant-speed pumps.
- Variable-frequency constant-pressure water supply equipment eliminates the need for a rooftop water tank, thereby reducing construction costs while addressing drawbacks such as secondary contamination of the water source, significant pressure fluctuations, and frequent pump start-ups.
- The equipment is very easy to install and takes up minimal floor space.
- It can be operated with fully automatic control; operators simply need to switch the control cabinet to select the desired operating mode, making operation straightforward.
Model Description
1. Product Series; 2. Variable-Frequency Constant Pressure Water Supply Device; 3. Water Supply Capacity; 4. Head; 5. Number of Pumps
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WhatsApp：8618737959990
Email：gqhbtop@gmail.com
Manager Liu：+8618737959990
Manager Yang：+8615037920517
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