KQG Stainless Series Auto-Pressure Boosting System
KQG stainless steel frequency conversion water supply equipment is one of the main water supply products of Kaiquan Group. The group has used the engineering technology experience accumulated in the industry for many years and advanced automation technology to further upgrade the KQG intelligent frequency conversion water supply equipment, which is safe in water supply, reliable in operation, water saving and hygienic. , high efficiency, energy saving, intelligent monitoring and other aspects of performance advantages are even more outstanding.
KQG Stainless Series Auto-Pressure Boosting System
Simple, reliable, and flexible in configuration
The classic equipment structure has been continuously optimized and improved for more than 20 years to ensure the stability of the system.
Strict process control to ensure product consistency and product quality
The configuration of water pumps, cabinets, frequency converters, etc. is flexible to meet the needs of different customer groups.
Highly efficient and energy-saving, reducing operating costs
The entire series comes standard with Kaiquan’s third-generation high-performance stainless steel multi-stage pump
All series are equipped with vertical pressure tanks as standard to improve the operating efficiency of the equipment during low flow periods.
Variable flow and voltage control technology reduces unit energy consumption of equipment during low flow periods
Full frequency conversion design, good water supply comfort
Second-level failover minimizes downtime and water outage accidents
The pressure fluctuation is small when starting, stopping and switching the water pump, and can quickly restore the steady state.
The adjustment range is large, completely solving the problem of frequently adding or subtracting pumps at critical flow points in the system.
Intelligent control, unattended
Time-varying pressure water supply, setting corresponding water supply pressure according to different water supply periods to achieve energy saving and consumption reduction
Digital bus collection, pressure, frequency, flow, power and other data bus collection, the data is stable and consistent
Optional remote monitoring module enables zero-distance inspection of the pump room without any supervision
- Equipment schematic diagram
- Operating principle
- Model description
- Control function
- Control cabinet
- Product specifications
The operating principle is as follows:
(1) Sleep pressure maintenance: In continuous operation mode, when no one is using water at night (small flow rate), pipeline losses are reduced, and the equipment automatically reduces the outlet pressure and operates in energy-saving sleep mode; in intermittent operation mode, when there is no one using water at night (small flow rate), the system replenishes water to the pressure tank and stores energy and then shuts down, relying on the pressure tank to maintain the pressure of the pipe network at night.
(2) Sleep wake-up: In continuous operation mode, when water consumption increases and the operating frequency is higher than the frequency setting upper limit, it will sleep and wake up to restore the target pressure set by the system; in indirect operation mode,When the water consumption increases and the outlet pressure drops, the equipment automatically starts a pump when the pressure is lower than the starting pressure value, and the variable frequency speed regulation maintains a constant pressure in the pipe network.
(3) Intelligent pump addition: When the water consumption continues to increase, the frequency conversion pump has reached the upper limit of the set frequency and the outlet pressure is still lower than the lower limit, the system automatically adds a water pump to run in parallel.The multi-constant pressure water supply that maintains the pressure of the pipe network adheres to the principle of “stop first, add first” to ensure the balance of the running time of each water pump.
(4) Intelligent pump reduction: As water consumption decreases, the frequency of parallel-operated water pumps begins to decrease. When the frequency is lower than the set lower limit, the system automatically reduces one water pump, adhering to the principle of “start first, reduce first”.Ensure the balanced running time of each water pump.
| The main function | Content |
| High performance digital PID | The constant pressure accuracy is ≤0.01Mpa, the stabilization time is ≤5s, and the water supply comfort of the equipment is good; |
| Terminal constant voltage | It adopts variable voltage control method, which is more energy-saving and comfortable than ordinary frequency conversion water supply equipment; |
| Manual emergency water supply | Even if the PLC fails, manual start can still achieve emergency water supply; |
| Digital network | Digital bus collection of pressure, frequency, power and other data, the data is stable and reliable; |
| Remote monitoring | Wireless network monitoring, fault warning, expert diagnosis, SMS notification; |
| Time-varying pressure water supply | The corresponding water supply pressure can be set according to different water supply periods to achieve energy saving and consumption reduction; |
| Color Chinese human-computer interface | Color touch screen, clear process control process, friendly human-machine interface, easy to operate; |
| Cabinet protection level²) | IP54 protection level, dustproof and waterproof; |
| Temperature and humidity control 3) | Temperature and humidity detection, automatic control of heating, ventilation and dehumidification; |
| Power supply and signal isolation 4) | Suppress transient overvoltage and overcurrent, and effectively suppress the interference of high-order harmonics to smart terminals; |
| Electrical protection | It has 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; |
| Automatic shielding of faulty pumps | If the running pump fails, the backup pump will automatically put into operation; |
| Water shortage protection | It will automatically stop when there is water shortage to prevent excessive suction and prevent the water pump from running dry; it will automatically start when the water source is restored; |
| Outlet pressure ultra-high pressure protection | Even if the pressure transmitter fails, the system can still determine that the pipe network pressure is too high, automatically shut down and issue an overpressure alarm; |
| Outlet pressure ultra-low pressure 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; |
| Pump room water immersion protection | When flooding occurs in the pump room, the equipment will automatically shut down and alarm; |
| Automatic pump change | After a single pump runs for a set time, it automatically switches to another one to balance the running time of the water pump; |
| Shut down and maintain pressure | At low flow rate at night, the equipment automatically sleeps and relies on the pressure tank to shut down and maintain pressure; |
Note: The control functions marked 1), 2), 3), and 4) are the functions of the H exquisite control cabinet. The M standard control cabinet is not equipped with this function.
| Main parts name list | |||
| No. | Name | No. | Name |
| 1 | Suction main pipe | 6 | Outlet main pipe |
| 2 | Service valve | 7 | Pressure sensor and electrical contact pressure gauge |
| 3 | Vertical multi-stage water pump (2~4 units) | 8 | Pump set chassis |
| 4 | Check valve | 9 | Water leakage detection |
| 5 | Service valve | ||
- Current parts are made of 304 stainless steel, making the equipment hygienic and safe;
- Full frequency conversion control system to ensure safe and reliable operation of the system;
- The lowest energy consumption solution to achieve efficient and lowest energy consumption controlled operation of equipment;
- Advanced and reliable remote monitoring platform, which can access the operating status of pump room equipment in real time through intelligent terminals;
- Full-cycle fast and efficient service system to solve customers’ worries;
- Chinese display, friendly human-machine interface, simple operation
Imported brand (ZILMET) diaphragm pneumatic tank
| Specifications | Total volume L |
Diameter D |
Total height H |
Maximum working pressure bar |
Maximum operating temperature ℃ |
Water outlet specifications G |
| QYG-50L-PN10-ZG | 50 | 380 | 770 | 10 | 99 | G1 |
| QYG-60L-PN10-ZG | 60 | 380 | 860 | 10 | 99 | G1 |
| QYG-80L-PN10-ZG | 80 | 450 | 830 | 10 | 99 | G1 |
| QYG-100L-PN10-ZG | 100 | 450 | 910 | 10 | 99 | G1 |
| QYG-100L-PN16-ZG | 100 | 450 | 910 | 16 | 99 | G1 |
| QYG-100L-PN25-ZG | 100 | 450 | 910 | 25 | 99 | G1 |
| QYG-200L-PN10-ZG | 200 | 550 | 1235 | 10 | 99 | G11/2 |
| QYG-200L-PN16-ZG | 200 | 550 | 1235 | 16 | 99 | G11/2 |
| QYG-300L-PN10-ZG | 300 | 630 | 1365 | 10 | 99 | G11/2 |
| QYG-300L-PN16-ZG | 300 | 630 | 1365 | 16 | 99 | G11/2 |
| QYG-300L-PN25-ZG | 300 | 630 | 1365 | 25 | 99 | G11/2 |
| QYG-500L-PN10-ZG | 500 | 750 | 1560 | 10 | 99 | G11/2 |
| QYG-500L-PN16-ZG | 500 | 750 | 1560 | 16 | 99 | G11/2 |
| QYG-500L-PN25-ZG | 500 | 750 | 1560 | 25 | 99 | G11/2 |
| QYG-750L-PN10-ZG | 750 | 750 | 2075 | 10 | 99 | G11/2 |
| QYG-750L-PN16-ZG | 750 | 750 | 2075 | 16 | 99 | G11/2 |
| QYG-1000L-PN10-ZG | 1000 | 850 | 2100 | 10 | 99 | G11/2 |
| QYG-1000L-PN16-ZG | 1000 | 850 | 2100 | 16 | 99 | G11/2 |
Domestic brand diaphragm pressure tank
| Model | Full volume L |
Diameter D |
Total height H |
Water outlet diameter DN |
Water outlet height H1 |
Nchor bolt centerCircle diameterd | Anchor bolt hole diameter |
| SQL600 | 330 | 600 | 1760 | 50 | 140 | 500 | 3-φ18 |
| SQL800 | 800 | 800 | 2210 | 50 | 140 | 660 | 3-φ21 |
| SQL1000 | 1300 | 1000 | 2345 | 80 | 150 | 830 | 3-φ24 |
| SQL1200 | 2200 | 1200 | 2694 | 80 | 150 | 1000 | 3-φ28 |
| SQL1400 | 3100 | 1400 | 2880 | 100 | 175 | 1160 | 3-φ28 |
| SQL1600 | 4800 | 1600 | 3320 | 100 | 175 | 1320 | 3-φ28 |
| SQL1800 | 6200 | 1800 | 3374 | 100 | 175 | 1500 | 3-φ30 |
| SQL2000 | 7900 | 2000 | 3534 | 100 | 175 | 1650 | 3-φ30 |
Note: Pressure levels are divided into PN0.6MPa, PN1.0MPa, PN1.6MPa, PN2.0MPa, PN2.5MPa
| Model specifications | All series | |
| Water supply flow | 5-270m³/h, determined by equipment model | |
| Water supply pressure | 20-160mH20, determined by equipment model | |
| Actual boost range of water pump | 40%-100% pump lift (full frequency control) | |
| Constant voltage accuracy | ≤1mH₂O | |
| Stable schedule | ≤5S (full frequency control) | |
| Operation method | Manual operation, automatic operation | |
| Starting method | Variable frequency pump soft start | |
| Control method | Equipment outlet constant pressure control or automatic pressure variable control (simulated terminal constant pressure control), can be set | |
| Operation mode | The QB operation mode is determined by the model of the supporting control cabinet. | |
| HMI | Color touch screen (determined by order contract) | |
| Protection/Alarm | Short circuit, overload, phase loss protection, indicator light alarm. The frequency converter has more complete self-protection | |
| Troubleshooting | Each other’s backup pump; automatically degraded operation | |
| Equipment material | The flow-through parts (pumps, valves, tanks, pipelines) are made of food-grade 304 stainless steel, copper and rubber diaphragm materials | |
| Protection level | Motor IP55 | |
| Control cabinet IP41~54 (determined by the order contract) | ||
| Working conditions | Installation conditions | Concrete machine base with sufficient load-bearing capacity |
| Power supply | 380V (+10%, -15%), 50Hz, should have a good ground wire, and the ground resistance should be less than 4 ohms | |
| EWnvironment | Indoor installation 0℃-40℃, no corrosive, flammable or explosive gas | |
| Altitude, vibration | Altitude below 1000m, below 5.9m/s (0.6g) | |
- Product technical specifications:
Special technical requirements beyond the samples must be reviewed by the technical department before ordering. (Performance parameters, power supply, altitude, temperature and humidity, etc.)
- Set up relevant content of reference samples.
- Equipment usage:
The standard application of the product is the domestic water supply of various buildings. Other applications must clearly define the corresponding process requirements and the corresponding configuration and functions of the corresponding scope of supply:The sample standard equipment is equipped with pumps for 1 use and 1 standby, 2 uses and 1 standby, and 3 uses and 1 standby. The pump inlet and outlet valves have the same caliber as the pump outlet, and other equipment configurations are the same.
- Equipment structure and supply method:
In order 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: fax customer requirements (pictures and texts) → design and drawing → customer confirmation → manufacture according to the drawing. The equipment can be supplied in parts and installed on site. The scope of supply needs to be determined separately. This form of supply does not require factory simulated operation tests and requires on-site debugging tests.
- Equipment packaging:
If there are no special instructions, when the equipment leaves the factory, the pump set + control cabinet will be packed in wooden boxes.
- Pipeline safety issues:
The product 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 working pressure without being damaged. When the supporting lift is high, in order to prevent overpressure pipe explosion,A safety valve or automatic pressure relief valve should be installed in the pump room and a water diversion pipe should be installed to the water collection well.
- Sample difference problem:
The product is constantly being improved, and some details of the installation dimensions and equipment provided in the sample may be different from the actual product.If you need accurate installation dimensions or other improvement information or have any questions about samples, please contact the technical department of Kaiquan Pump Industry Branch No. 4.
| Serial number | Product series | Exquisite type-H | Basic type-M | |
| KQK3-H | KQK3-M | |||
| 1 | Configuration | Breaker | Schneider/Siemens | Schneider/Siemens |
| 2 | Intermediate relay | Siemens | Siemens | |
| 3 | Indicator light | Siemens | Siemens | |
| 4 | Frequency converter | Siemens (H1), ABB (H3) | Siemens (M1), ABB (M3 | |
| 5 | PLC | Siemens | Siemens | |
| 6 | HMI | 10″ color embedded integrated touch screen | 7″ color embedded integrated touch screen | |
| 7 | Yuli transmitter | Danfoss | Danfoss | |
| 8 | Cabinet | KES cabinet | Ordinary cabinet | |
| 9 | Function | BA interface | —— | —— |
| 10 | Ethernet interface | Optional | Standard configuration | |
| 11 | RS485 interface | Optional (choose 1 from 2 with GPRS module) | Optional | |
| 12 | GPRS | Standard configuration | Optional | |
| 13 | Main line switch | Standard configuration | —— | |
| 14 | Multifunctional instrument | Standard configuration | —— | |
| 15 | Surge protector | Standard configuration | —— | |
| 16 | Phase sequence protector | No separate configuration (inverter integrated) | ||
| 17 | Monitoring data | Incoming power data, equipment operation data, water pump operation data | Equipment operating data, water pump operating data | |
| 18 | Temperature and humidity control | Standard configuration | —— | |