The 5rd Generation Plus Digital Integrated Frequency Adjustable Water Supply Equipment
The ultimate development direction of secondary supply equipment is intelligence. Currently, frequency conversion constant pressure water supply equipment still adopts a traditional relay control+digital control hybrid technology scheme, which has the following main problems:
- Low level of digitization
Due to the preservation of traditional relay control and the extensive use of master switches, indicator lights, relays, and traditional instrument designs, the wiring quantity is large, cumbersome, time-consuming, error prone, difficult to standardize production, and difficult to software expand functionality.
- Low degree of generalization
The mixed control system solutions from different manufacturers vary greatly, with some relying on special functions of frequency converters, some relying on code experts for self-made controllers, and some relying on special black box components, which cannot be standardized, resulting in poor long-term maintainability and interchangeability.
- Low level of intelligence
Usually only detecting pressure and frequency, with weak perception ability, can only achieve basic control. Due to the lack of participation in control decisions such as flow, electricity, and energy efficiency, the analysis and adaptability of the equipment are greatly reduced, and various intelligent controls cannot be implemented.
In response to the above issues, Kaiquan has developed the fifth generation of dual PLC digital integrated full frequency conversion water supply equipment based on more than 20 years of engineering experience and multiple innovative technologies in the water supply industry. This product not only completely solves the aforementioned problems, but also realizes the four full designs of secondary supply equipment in the industry: full parameter detection, full digital control, full frequency conversion integration, and full intelligent control.
- Applicable scope
- Operating principle
- Model Description
- Product specifications and performance
Domestic water: high-rise buildings, residential communities, villas, etc
Public places: hospitals, schools, sports venues, airports, etc
Commercial buildings: hotels, office buildings, department stores, etc
Automatic start stop
When the user’s water consumption increases and the outlet pressure of the equipment drops to the starting pressure, the equipment starts and operates intelligently at a constant pressure; When there is a small flow rate at night, the equipment automatically accelerates and stops after replenishing water and storing energy in the pressure tank. By relying on the pressure tank to shut down and maintain pressure, achieve water supply in small flow segments.
Automatic speed regulation
Intelligently adjust the speed of the water pump unit based on changes in user water consumption. Automatically increase speed when water consumption increases, and automatically decrease speed when water consumption decreases. Real time dynamic adjustment ensures constant pressure at the end of the user’s end and comfortable water supply.
Intelligent control
The equipment has the ability to perceive big data such as pressure, flow, and electricity. It adopts the lowest energy consumption control technology and intelligently controls the number and speed of water pumps according to changes in user water consumption, achieving high efficiency and energy conservation.
The example of the meaning of the KQGV series complete equipment model is as follows:
The example of the meaning of the fifth generation equipment supporting control cabinet model is as follows:
The example of the meaning of the WFYV series complete equipment model is as follows:
1) Frequency conversion cabinet classification
M – represents standard configuration, and the main components of the control cabinet, such as PLC, frequency converter, and low-voltage electrical appliances, are from well-known domestic brands;
2) Operation mode
QB-1 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.
Attention: This product can be extended and applied to KQF box type negative pressure water supply equipment, etc. Please consult our technical personnel for specific options.
Basic Technical Specifications of Standard Products
| Model specifications | Complete series of KQGV standard equipment | |
| Water supply flow rate | 5-135m³/h, determined by equipment model | |
| Water supply pressure | 20-140mH₂O,determined by device model | |
| Actual pressurization range of water pump | 40%—100%pump head (fully variable frequency control) | |
| Constant voltage accuracy | ≤1mH₂O | |
| Stable time | ≤5S | |
| Operation method | Main control mode, standby mode (both modes have manual operation and automatic operation) | |
| Starting method | Variable frequency pump soft start | |
| Control method | Equipment outlet constant pressure control or automatic variable pressure control (simulating terminal constant pressure control), can be set | |
| Operation mode | QB(fully variable frequency operation) | |
| Human machine interface | Digital instruments, true color touch screens | |
| Protection/Alarm | Short circuit, overload, phase loss protection, indicator light alarm. Variable frequency drive has more comprehensive self-protection | |
| Troubleshooting measures | Mutual backup pumps; Mutual backup control system | |
| 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, control cabinet IP55, frequency converter IP55 | |
| Working conditions | Installation conditions | Concrete frame with sufficient load-bearing capacity |
| Power supply | 380V (+10%, -15%), 50HZ, should have a good grounding wire, and the grounding resistance should be less than 4 ohms | |
| Environment | Indoor installation at 0 ℃ -40 ℃, without corrosive, flammable, or explosive gases | |
| Relative humidity | No more than 90% (20 ℃), no condensation | |
| Altitude, vibration | Below 1000m altitude, below 5.9m/s (0.6g) | |
For those exceeding the neutral performance parameters of the sample, technical solutions and product selection can be determined with our company’s technical personnel.
- High reliability
Reliability design (long lifespan design), with core components designed to have a lifespan three times that of conventional products. Strong adaptability to the power grid, the frequency converter automatically maintains a constant output voltage in the event of voltage fluctuations. The control cabinet IP55, frequency converter IP55, and PCBA are thickened with stronger dust-proof and moisture-proof capabilities. Dual PLC main and backup redundancy technology is used, and the control systems are backup to each other, ensuring safety and reliability.
- High performance
Full frequency conversion+high-performance digital PID, stable water supply pressure, good comfort
Intelligent control strategies for pressure, flow, electricity, and other big data collection, as well as minimum energy consumption.
Digitalization+warning and alarm mechanisms, expert level remote diagnosis
Cloud+water supply, intelligent monitoring, achieving zero distance inspection of pump rooms.
- High energy efficiency
Water pump motor configuration
All water pumps have obtained CQC energy-saving certification
Variable current and voltage technology
Small and medium-sized traffic segments can save 3% -5% energy
Full frequency conversion control technology
Specific flow segments can save 3% -5% energy
Kaiquan Energy saving Technology Patent
Average energy consumption, can save 20% energy
Standard pressure tank capacity
Small flow rate range, can save 3% -5% energy
Expansion of import and export diameter
Large to medium flow rate range, can save 3% -5% energy
- High quality
High end cabinet design
The structure adopts the German Weitu standard design.
The surface adopts a three in one spraying process to effectively improve the corrosion and high temperature resistance of the cabinet body.
Nuclear level welding process level
The product has passed the nuclear welding process evaluation
- Total Quality Control
Through ISO9001 quality management system certification.
“Human Machine Material Method Environment” comprehensive quality management.
Product quality early planning (APQP)
Failure mode and effect analysis (FMEA)
- Corrosion resistant epoxy resin coating
The inner wall coating is hygienic, environmentally friendly, and uniform and consistent.
The higher the head of a water pump of the same specification, the better the energy-saving effect.
- Efficiency curve shifts towards small flow segments
The lower the actual constant pressure value (relative to the rated head of the water pump), the more the efficiency curve of the water pump shifts towards the direction of low flow rate;
- Lower limit of flow in efficient areas
When the water pump operates at power frequency, the lower limit of the flow rate in the high-efficiency zone is approximately 60% of the rated flow rate;
When the water pump operates with variable frequency, the lower limit of the flow rate in the high-efficiency zone is about 50% of the rated flow rate;
When the water pump operates at low constant pressure, the lower limit of the flow rate in the high-efficiency zone is about 40% of the rated flow rate;
- Under different constant pressures, the energy efficiency comparison
Within the 60% range of the rated head of the water pump, the average unit energy consumption (or unit average efficiency) of the equipment is almost the same
- More energy-efficient in actual engineering
Due to the imbalance of secondary water supply, the proportion of peak water usage in a day is relatively short, and most of the time is in medium and small flow operation. The lower the constant pressure value, the closer the unit efficiency is to the high-efficiency zone, and the better the energy-saving effect;
Same flow equipment with multiple pump configurations for better energy efficiency
According to the experimental method of CQC3153 “Technical Specification for Energy Conservation Certification of Secondary Water Supply Equipment”, energy-saving analysis was conducted and the following conclusions were drawn:
- Two uses and one backup generally save 10% energy compared to one use and one backup;
- 3 uses and 1 backup may not necessarily save energy compared to 2 uses and 1 backup, specific analysis is needed
- The energy efficiency of 1 in use and 1 backup+auxiliary pump is equivalent to that of 2 in use and 1 backup;
- The actual user flow during operation may be relatively small, and with the same energy efficiency estimate, it is still more energy-efficient to configure multiple pumps in actual engineering.
| List of Main Component Names | |||
| Number | Name | Number | Name |
| 1 | Water absorption main pipe | 6 | Water outlet main pipe |
| 2 | Maintenance valve | 7 | Pipeline cover plate (excluding installation) |
| 3 | Vertical multi-stage water pump (2-4 units) | 8 | Pressure sensor (or electric contact pressure |
| 4 | Digital integrated frequency converter | 9 | Control cabinet |
| 5 | Check valve | 10 | Leakage detection |
The series of products with clear installation dimensions included in this sample are called standard products. The technical performance of standard products in KQGV and WFYV series meets the basic technical specification table.
| List of Main Component Names | |||
| Number | Name | Number | Name |
| 1 | Water inlet | 7 | Pipeline cover plate (excluding installation) |
| 2 | Maintenance valve | 8 | Pressure sensor (or electric contact pressure gauge) |
| 3 | Vertical multi-stage water pump (2-4 units) | 9 | Control cabinet |
| 4 | Digital integrated frequency converter | 10 | Leakage detection |
| 5 | Check valve | 11 | Vacuum suppressor |
| 6 | Water outlet main pipe | 12 | Stable flow tank |
The series of products with clear installation dimensions included in this sample are called standard products. The technical performance of standard products in KQGV and WFYV series meets the basic technical specification table.
| Question | Ordering Notice |
| 1.Product specification | Special technical requirements that exceed the “Standard Product Technical Specifications” table must be reviewed by the technical department before ordering. (Performance parameters, power supply, altitude temperature, humidity, etc.) |
| 2. Equipment configuration and functions | The sample standard equipment is equipped with pumps as 1 in use 1 standby, 2 in use 1 standby, and 3 in use 1 standby. The inlet and outlet valve diameters of the pump are the same as those of the pump outlet. The inlet and outlet pipe diameter of the pump unit is considered to be less than 1.8/s (excluding the flow rate of the standby pump). For other equipment configurations, please refer to the relevant contents of the sample. |
| 3. Equipment Usage | The standard application of the product is the domestic water supply for various types of buildings, and other applications must have clear requirements for the corresponding process and different supply ranges. |
| 4. Equipment structure and supply method | To facilitate the installation and layout of the pump room, various types and series of products can be designed and sized according to customer requirements. The customization process is as follows: customer requirements (drawings, texts) fax design drawings customer confirmation manufacture according to the drawings, equipment can be supplied as loose parts, installed on site, and the scope of supply needs to be determined separately. This supply form does not undergo factory simulation running tests and requires on-site debugging tests. |
| 5. Equipment packaging | Unless otherwise specified, the pump unit and control cabinet are packaged in wooden boxes when the equipment leaves the factory. |
| 6. Pipeline safety issues | The product can withstand a static pressure test of 1.5 times the rated working pressure. In application, the system pipelines and water appliances should also be able to withstand the corresponding working pressure without damage. When the pump head is high, to prevent overpressure and pipe burst, a safety valve or automatic pressure relief valve should be installed in the pump room and a water intake pipe should be installed to the collection well. Special attention should be paid to the maximum pressure that may occur in the pipeline of non negative pressure water supply equipment, which is equal to 1.3-1.4 times the rated head of the water pump plus 0.4Mpa (inlet pressure). |
| 7. Sample difference issue | The product is constantly improving, and some details of the installation dimensions and equipment provided by the sample may differ from the actual product. If you need accurate installation dimensions or other improvement information, or have any questions about the sample, please contact the technical department of Kaiquan Pump Industry Fourth Branch. |
Operation and maintenance support system
- Professional service team
- Provide emergency service accessories
- Able to handle various mechanical and electrical faults in a timely manner
- Guarantee of 20 years of service engineering experience
- Provide emergency service accessories
- Each service point has a spare parts warehouse to respond to the scene in a timely manner
- Regular inspections
- We can still ensure regular equipment inspections during important holidays and other important seasons
- Reduce customer manpower support and lower customer maintenance costs
Imported brand (ZILMET) diaphragm pressure tank
| Specifications | Total volume L |
Diameter D |
Total height H |
Maximum working pressure bar |
Maximum operating temperature ℃ |
Water outlet specifications G |
| G380X770 | 50 | 380 | 770 | 10 | 99 | G1 |
| G380X860 | 60 | 380 | 860 | 10 | 99 | G1 |
| G450X830 | 80 | 450 | 830 | 10 | 99 | G1 |
| G450X910 | 100 | 450 | 910 | 10 | 99 | G1 |
| G450X910 | 100 | 450 | 910 | 16 | 99 | G1 |
| G450X910 | 100 | 450 | 910 | 25 | 99 | G1 |
| G550X1235 | 200 | 550 | 1235 | 10 | 99 | G 11/2 |
| G550X1235 | 200 | 550 | 1235 | 16 | 99 | G11/ |
| G630X1365 | 300 | 630 | 1365 | 10 | 99 | G 11/2 |
| G630X1365 | 300 | 630 | 1365 | 16 | 99 | G1112 |
| G630X1365 | 300 | 630 | 1365 | 25 | 99 | G 11/2 |
| G750X1560 | 500 | 750 | 1560 | 10 | 99 | G 11/2 |
| G750X1560 | 500 | 750 | 1560 | 16 | 99 | G 11/2 |
| G750X1560 | 500 | 750 | 1560 | 25 | 99 | G 11/2 |
| G750X2075 | 750 | 750 | 2075 | 10 | 99 | G 11/2 |
| G750X2075 | 750 | 750 | 2075 | 16 | 99 | G 11/2 |
| G850X2100 | 1000 | 850 | 2100 | 10 | 99 | G 11/2 |
| G850X2100 | 1000 | 850 | 2100 | 16 | 99 | G 11/2 |
Domestic brand diaphragm pressure tank
| Model | Total volume L |
External dimensionsmm | Installation size mm | ||||||
| Diameter D |
Net height h |
Total height H |
Outlet diameter D N | Water outlet heightH1 | The diameter of the center circle of the anchor bolt d | Diameter of anchor bolt hole φ | |||
| SQL600- | 0.6 | 320 | 650 | 1350 | 1900 | 50 | 140 | 500 | 3-φ18 |
| 1.0 | |||||||||
| 1.6 | |||||||||
| SQL800- | 0.6 | 750 | 850 | 1850 | 2400 | 50 | 140 | 660 | 3-φ21 |
| 1.0 | |||||||||
| 1.6 | |||||||||
| SOL1000- | 0.6 | 1500 | 1050 | 2050 | 2650 | 80 | 150 | 830 | 3-φ24 |
| 1.0 | |||||||||
| 1.6 | |||||||||
| SQL1200- | 0.6 | 2400 | 1250 | 2450 | 3050 | 80 | 150 | 1000 | 3-φ28 |
| 1.0 | |||||||||
| 1.6 | |||||||||
| SQL1400- | 0.6 | 3500 | 1450 | 2550 | 3250 | 100 | 175 | 1160 | 3-φ28 |
| 1.0 | |||||||||
| 1.6 | |||||||||
| SOL1600- | 0.6 | 5000 | 1650 | 2950 | 3650 | 100 | 175 | 1320 | 3-φ28 |
| 1.0 | |||||||||
| 1.6 | |||||||||
| SOL1800- | 0.6 | 7250 | 1850 | 3150 | 3850 | 100 | 175 | 1320 | 3-φ30 |
| 1.0 | |||||||||
| 1.6 | |||||||||
| SOL2000- | 0.6 | 8500 | 2050 | 3150 | 3850 | 100 | 175 | 1650 | 3-φ30 |
| 1.0 | |||||||||
| 1.6 | |||||||||