WFY Controllable Compensated Pipe-Network Add-Pressure Water Supply System
A pressurized water supply device that is directly connected in series with the water supply pipe network to pressurize water supply, using the pressure of the water supply pipe network to ensure that the user’s water pressure, water quantity, and water quality are met, and it is guaranteed not to affect the minimum service head specified by the water supply department.
Kaiquan has developed WFYIV, a new generation of high-end tank-type laminated pressure (non-negative pressure) water supply equipment, relying on years of mature technology and rich experience in secondary pressurization and regulation.
Its performance advantages are even more outstanding in terms of water supply safety, reliable operation, water conservation and sanitation, high efficiency and energy conservation, and intelligent monitoring.
- Stable current compensation technology
- Operating principle
- Main and backup redundant dual PLC control system
- High performance digital PID
- Remote intelligent monitoring
- Model Description
- product specifications
The biggest feature of laminated water supply is sanitation and energy saving, but if effective technical measures are not adopted, two new problems will arise:
One is the impact of sudden changes in the flow of starting and stopping pumps on the pipe network; the other is the problem of excessive suction for a long time during peak periods. The most fundamental solution is two-way buffering and peak storage compensation.
The characteristics of Kaiquan WFY IV stable current compensation technology are as follows:
- Double buffering (to prevent negative pressure formation and overpressure explosion) with 0 delay;
- Independent parallel compensation, without the need for electric flow limiting valves and high head of the main pump, can achieve minute level compensation capability;
- Intelligent and controllable compensation, input compensation when needed most, and the compensation flow and compensation time are easy to control and adjust;
- Compensation is safe and reliable. The compensation device is much more reliable than the flow controller (electric flow limiting valve), and due to the parallel compensation measure, even if the compensation facility fails, it will not affect normal water supply.
1) Stacking operation: On the basis of municipal pressure, make up as much difference as possible (stacking operation, energy-saving operation), during which the stabilizing tank mainly plays a buffering role.
2) Compensation operation: During peak water supply periods, when municipal pressure approaches the lower limit, or when the renewal cycle is reached, the compensation facilities will be automatically put into operation. It can achieve a compensation water volume of 30s-300s for the designed flow rate.
3) Reduced pressure operation: After compensation operation, if the municipal pressure cannot be restored to normal, the water supply pressure will be automatically lowered, and low-frequency reduced pressure operation will be carried out. At this time, the equipment can only provide partial user flow,
After the municipal pressure returns to normal, restore 100% of the water supply capacity.
4）Low pressure protection: If the pressure of the municipal pipeline network drops rapidly to the lower limit, it is considered that there is a problem with the water source and operation is prohibited. After the pressure is restored, restart operation.
It uses industrial-grade, high-performance programmable controller PLC as the control core and adopts dual pressure inspection to realize speed control and intelligent dispatching of superimposed water supply equipment according to user water conditions and municipal pipe network water supply conditions.
The WFYIV control cabinet adopts a main and backup redundant dual PLC control system. Even if the main control PLC fails due to lightning, surge and other unexpected events, it can still meet the user’s automatic constant pressure water supply by manually switching to the backup control system, making the control system safer and more reliable.
It uses a high-performance, digital, self-tuning PID module specially developed for pressurized water supply systems to achieve constant pressure closed-loop speed regulation, strong anti-interference ability, and sensitive and rapid dynamic adjustment. Constant voltage accuracy ≤0.01Mpa, stabilization time ≤5s. High-performance digital PID ensures the comfort of equipment water supply.
Kaiquan Monitoring Center monitors the operating status of water pumps, inlet pressure, outlet pressure, operating frequency, current and voltage, etc. 24 hours a day, all day long; equipment status warning, alarm, and expert-level diagnosis; fault alarm text messages notify pump station maintainers.
Explanation: 1) Frequency conversion cabinet classification
G – represents high-end products, and the main components of the control cabinet, such as PLC, frequency converter, pressure transmitter, and low-voltage electrical appliances, adopt internationally renowned brands
2) Operation mode
QB – represents full frequency conversion (each pump is equipped with one frequency converter), and all water pumps operate alternately with frequency conversion, serving as backup pumps for each other
| Number | Name | Quantity | Number | Name | Quantity |
| 1 | Vertical multi-stage centrifugal pump | 2-4 | 10 | Water supply main pipe | 1 |
| 2 | Public channel steel frame | 1 | 11 | Maintenance valve | 4-8 |
| 3 | Check valve | 2-4 | 12 | Main inlet pipe | 1 |
| 4 | piping support | 2 | 13 | Optional: Air pressure tank (including pipeline valves) | 1 |
| 5 | Vacuum suppressor | 1 | 14 | Intelligent compensation pipeline | 1 |
| 6 | Stable flow tank | 1 | 15 | Eccentric reducer | 2-4 |
| 7 | Intelligent compensation | 1 | 16 | Isolation pad | 2-4 |
| 8 | Pressure gauge and sensor | 2 | 17 | Concentric reducer | 2-4 |
| 9 | Pump unit soft joint | 4-8 | 18 | Leakage detection | 1 |
| major function | content |
| Dual PLC control | The main and backup redundant dual PLC control system prevents accidental events such as lightning and surges from causing faults and water shutdowns |
| High performance digital PID | Constant pressure accuracy ≤ 0.01Mpa, stable time ≤ 5s, and good water supply comfort of the equipment |
| Terminal constant pressure | Adopting a variable flow and pressure control method, which is more energy-efficient and comfortable than conventional variable frequency water supply equipment |
| Manual emergency water supply | Even if all dual PLCs fail, manual startup can still achieve emergency water supply |
| digital network | Pressure, frequency, power and other data are collected through digital bus, ensuring stable and reliable data |
| Remote monitoring | Wireless network monitoring, fault warning, expert diagnosis, SMS notification |
| Colorful Chinese human-machine interface | 10 “color touch screen, clear process control flow, user-friendly human-machine interface, and easy operation |
| Temperature and humidity control | Temperature and humidity detection, automatic control of heating, ventilation, and dehumidification |
| Power and signal isolation | Suppressing transient overvoltage and overcurrent, effectively suppressing interference of high-order harmonics on intelligent terminals |
| Electrical protection | Equipped with fault alarms and automatic protection for overvoltage, undervoltage, overcurrent, overload, phase loss, short circuit, overheating, etc |
| Automatic fault reset | Automatically reset recoverable fault alarms such as frequency converters to ensure continuous and stable operation of equipment |
| Automatic shielding of faulty pump | If the operating pump fails, the standby pump will automatically put into operation; Automatic skipping of faulty pumps during scheduling operation |
| Low pressure protection for inlet pressure | Automatic shutdown due to water shortage to prevent excessive suction and prevent the water pump from running dry; Water source restoration, automatic start |
| Import pressure ultra-high pressure protection | The pressure transmitter has malfunctioned, and the pipeline pressure is too high. The system can still automatically shut down and give an overpressure alarm |
| Import pressure ultra-low pressure protection | When the equipment is running at full load and the operating pressure is still below the set lower limit, the system will automatically shut down and give a low pressure alarm |
| Controllable compensation | During peak water usage, the optimal timing is to control the compensation device to regulate and compensate the stored water source to the user |
| Automatic water change | Ensure fresh and hygienic storage water sources, regularly activate compensation devices, and update storage water sources |
| Automatic pump replacement | Automatically switch to another pump after setting the running time of a single pump, and balance the running time of the water pump |
| Shutdown protection | At night, with small flow, the equipment automatically sleeps and relies on the pressure tank to shut down and maintain pressure |
Adopting a continuous and enclosed water supply method to prevent secondary pollution caused by biological entry and unmanned destruction, ensuring water supply safety;
- Using food grade 304 stainless steel material for overcurrent components, as well as diaphragm tanks and seals that meet drinking water hygiene standards, to ensure water supply hygiene;
- It can fully utilize the pressure potential energy of municipal water sources, compensate for the difference to a certain extent, and save more than 50% energy;
Adopting independently developed energy-saving patented technology, it can save 20% more energy than ordinary non negative pressure equipment;
- Variable frequency redundant control system to ensure safe and reliable operation of the system;
- Minimum energy consumption solution, achieving efficient and minimum energy consumption control operation of equipment;
Continuous online water quality monitoring to ensure water quality safety;
- An advanced and reliable remote monitoring platform that can access the real-time operation status of pump room equipment through intelligent terminals;
- A fast and efficient service system throughout the entire cycle to address customer concerns;
Technical performance and functionality
The series of products with clear installation dimensions included in this sample are called standard products. The technical performance of WFY series standard products meets the basic technical specifications table
| Basic Technical Specifications of Standard Products | ||
| Model specifications | Full range | |
| Water supply flow rate | 5-200m ²/ h. Determined by device model | |
| Water supply pressure | 20-160mH20, determined by equipment model | |
| Actual pressurization range of water pump | 40% -100% pump range (fully variable frequency control) | |
| Pressure accuracy | ≤1mH20 | |
| Stable time | 5s | |
| Stable flow tank capacity | 300L-2800L depends on specific model specifications | |
| Operation method | Manual operation | |
| Starting method | Variable frequency pump soft start | |
| control mode | Equipment outlet constant pressure control or automatic variable pressure control (simulating constant pressure control at the end), can be set | |
| Operation mode | QB (full frequency conversion) | |
| man-machine interface | Digital instrument, 10 “true color touch screen | |
| Protection/Alarm | Short circuit, overload, phase loss protection, indicator light alarm. The frequency converter has a history of perfect self-protection | |
| Troubleshooting measures | Mutual backup pumps; Automatic degraded operation | |
| Equipment material | The overcurrent section (pump, valve, tank, pipeline) is made of food grade 304 stainless steel, copper, and rubber diaphragm materials | |
| Protection level | Motor IP55, IP54 | |
| working conditions | Installation conditions | Concrete foundation with sufficient load-bearing capacity |
| source | 380V (+10%, -15%), 50HZ, should have a good grounding wire, and the grounding resistance should be less than 4 ohms | |
| environment | Indoor installation at 0C-40 ° C, without corrosive, flammable, or explosive gases | |
| Altitude, vibration | Below 1000m altitude, below 5.9m/s (0.6g) | |
All flow-passing parts (pumps, valves, flow stabilizing tanks, and pipelines) of WFY’s standard products are made of 304 stainless steel, with high-grade matte surface treatment by shot blasting; the pressure-stabilizing tank material is Q235B or 16MnR. The outdoor protective box material is made of galvanized sheet and spray-coated by default.
For optional products, the contract should separately specify the supply scope and material requirements of the complete set of equipment, and the specific specifications of each part of the purchased equipment. Anything not specified will be deemed to be manufactured according to sample standard products.
Pipeline safety and pump lift issues:
When designing the WFY product booster unit, it has been considered that it can superimpose 0.3Mpa municipal pipe network pressure and can withstand the static pressure test of 1.5 times the rated working pressure; the system pipelines and water appliances in the application should also be able to withstand the corresponding static pressure test without being damaged. The pressure level of the steady flow tank is designed according to 1.0Mpa. The pump lift can be calculated by subtracting the required lift from the minimum allowable suction pressure of the municipal pipe network. If the municipal pipe network pressure exceeds the above range, be sure to declare it in advance and special designs can be made.
When the lift of the pump is high, in order to prevent pipe explosion due to overpressure, a safety valve or automatic pressure relief valve should be installed in the pump room and a pressure relief water diversion pipe should be installed to the water collection well.
10000 square meter heavy-duty workshop
1200 sets of advanced production and testing equipment
Kaiquan is now equipped with 1200 sets of advanced production and inspection equipment
Among them, there are 56 imported equipment, 24 sets of large-scale processing equipment, and more than 300 sets of CNC processing equipment
Heavy workshop, with a construction area of 10000 square meters and an investment of 150 million yuan
These advanced equipment will comprehensively enhance Kaiquan’s processing and manufacturing capabilities, achieving international manufacturing quality
Professional service team
Able to promptly handle various mechanical and electrical faults
Guarantee of 20 years of service engineering experience
Provide emergency service accessories without affecting normal water supply
Each service point has a spare parts warehouse to respond promptly to the scene
Regular inspections
We can still ensure regular equipment inspections during important holidays and other holidays
Reduce customer manpower support and lower customer maintenance costs.