Product Overview
The QHYB-LG Automatic Variable Frequency Water Supply System (equipped with LG removable vertical multistage pump) is a tankless, integrated water supply solution. The system consists of a pump unit, automatic control system, and pressure stabilization device, providing stable and efficient water supply for a wide range of applications. The system automatically adjusts the pump speed to maintain constant pressure, ensuring high efficiency and energy savings.
Model Designation
Key Features
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Tankless Integrated Structure: The highly integrated design eliminates the need for an additional water tank, saving space and simplifying installation.
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Supports Pressure Tank (Air Pressure) and Variable Frequency Operating Modes: Flexible operating modes allow for either air pressure or variable frequency operation.
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Multi-Pump Parallel Configuration: Supports 1-4 pumps in parallel to meet different flow and head requirements.
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Efficient Low Flow Operation: The system handles low-flow conditions with an auxiliary pump, improving overall system efficiency and reducing energy consumption.
Engineering Overview
The QHYB-LG automatic variable frequency water supply system is designed to meet the water supply needs of various industries and residential buildings. The system combines variable frequency technology and air pressure devices to adjust the flow and pressure automatically. The towerless design effectively saves space and reduces installation footprint, making it suitable for a variety of applications, including residential, commercial, and fire protection systems.
Typical Applications
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Residential and Commercial Buildings: For providing constant pressure water supply.
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Fire-Fighting and Sprinkler Systems: For providing stable pressure for fire protection systems.
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Industrial Water Supply: For providing industrial water supply to production facilities.
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Hotels, Hospitals, Schools, and Office Spaces: Ensuring continuous and stable water supply.
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Agricultural Irrigation and Pressure Maintenance Systems: For irrigation and maintaining pressure in agricultural systems.
System Configuration
Pump Components
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Pump Unit: CDLF stainless steel multistage centrifugal pumps with 1–4 parallel configurations to meet different flow requirements.
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Control Cabinet: Automatic variable frequency control system for intelligent pressure adjustment.
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Pressure Tank: Ensures output stability during low flow or leakage conditions.
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Pipelines and Valves: Stainless steel construction, corrosion-resistant and durable, ensuring the long-term stability of the system.
Components and Supply
The key components of the QHYB-LG system include the pump unit, control cabinet, pressure tank, pipelines, and valves. The pump body materials can be selected based on the media being pumped, and all critical components are designed for long-lasting, reliable performance.
Technical Service
The QHYB-LG system offers comprehensive technical support services, including installation, commissioning, regular maintenance, and troubleshooting, ensuring long-term, efficient, and reliable operation.
Operating Conditions
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Applicable Media: Suitable for clean water and non-corrosive liquids.
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Maximum Medium Temperature: ≤80°C.
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System Pressure: The pressure can be adjusted according to specific needs.
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Flow Rate Adjustment: The pump speed is adjustable to meet different operational needs.
Service Conditions
Regular inspection of the pump unit, control system, pressure tank, pipelines, and valves is necessary to ensure the system operates efficiently and safely.
Protection Features
The QHYB-LG system is equipped with overcurrent protection, temperature monitoring, and liquid level protection systems, ensuring that the system can stop operation in abnormal conditions to prevent equipment damage.
Selection Standards
When selecting the pump model, consider factors such as the design flow, head pressure, and the type of water being supplied. Also, consider the seasonal and regional variations to ensure the system is optimized for specific conditions.
Specifications & Installation
Selection Guide
1. Selecting Pumps for Variable Frequency Constant-Pressure Water Supply Systems
| 1. Selection Based on Equipment Head | ||||||||||
|
Equipment Head (m)
|
20
|
26
|
32
|
40
|
50
|
60
|
70
|
80
|
100
|
120
|
|
Supply Height (m)
|
10
|
14
|
18
|
25
|
32
|
38
|
46
|
55
|
72
|
88
|
| 2. Selection Based on Number of Households Served | ||||||
|
Flow Rate (m³/h)
|
6
|
12
|
18
|
25
|
36
|
50
|
|
Households Served
|
20–30
|
40–60
|
60–100
|
100–150
|
150–200
|
200–300
|
|
Flow Rate (m³/h)
|
75
|
100
|
150
|
200
|
250
|
|
Households Served
|
400–500
|
600–1000
|
1000–1500
|
1500–2000
|
2000–3000
|
Performance Parameters
|
Applicable Buildings
|
Sprinkler Flow (L/s)
|
Sprinkler Operating Pressure (MPa)
|
Applicable Building Height (m)
|
Recommended Water Supply System Model (Vertical Pump Set)
|
||
|
Building Type
|
Design Sprinkler Density (L/(min·m²))
|
Coverage Area (m²)
|
||||
|
Industrial Building
|
10
|
300
|
60
|
0.1
|
≤12
|
QHYB60-0.24-150LG-3
|
|
Industrial Building
|
10
|
300
|
60
|
0.1
|
≤24
|
QHYB60-0.4-150LG-3
|
|
Industrial Building
|
10
|
300
|
60
|
0.1
|
≤36
|
QHYB60-0.6-150LG-3
|
|
Industrial Building
|
10
|
300
|
60
|
0.1
|
≤50
|
QHYB60-0.8-150LG-3
|
|
Industrial Building
|
10
|
300
|
60
|
0.1
|
≤72
|
QHYB60-1.0-150LG-3
|
|
Industrial Building
|
10
|
300
|
60
|
0.1
|
≤100
|
QHYB60-1.2-150LG-3
|
|
Storage Building
|
15
|
300
|
90
|
0.1
|
≤12
|
QHYB90-0.24-150LG-3
|
|
Storage Building
|
15
|
300
|
90
|
0.1
|
≤24
|
QHYB90-0.4-150LG-3
|
|
Storage Building
|
15
|
300
|
90
|
0.1
|
≤36
|
QHYB90-0.6-150LG-3
|
|
Storage Building
|
15
|
300
|
90
|
0.1
|
≤50
|
QHYB90-0.8-150LG-3
|
|
Storage Building
|
15
|
300
|
90
|
0.1
|
≤72
|
QHYB90-1.0-150LG-3
|
|
Storage Building
|
15
|
300
|
90
|
0.1
|
≤100
|
QHYB90-1.2-150LG-3
|
|
Ordinary Hazard
|
6
|
300
|
40
|
0.1
|
≤12
|
QHYB40-0.24-100LG-3
|
|
Ordinary Hazard
|
6
|
300
|
40
|
0.1
|
≤24
|
QHYB40-0.4-100LG-3
|
|
Ordinary Hazard
|
6
|
300
|
40
|
0.1
|
≤36
|
QHYB40-0.6-100LG-3
|
|
Ordinary Hazard
|
6
|
300
|
40
|
0.1
|
≤50
|
QHYB40-0.8-100LG-3
|
|
Ordinary Hazard
|
6
|
300
|
40
|
0.1
|
≤72
|
QHYB40-1.0-100LG-3
|
|
Ordinary Hazard
|
6
|
300
|
40
|
0.1
|
≤100
|
QHYB40-1.2-100LG-3
|
|
Light Hazard
|
3
|
300
|
15
|
0.1
|
≤12
|
QHYB15-0.24-50LG-3
|
|
Light Hazard
|
3
|
300
|
15
|
0.1
|
≤24
|
QHYB15-0.4-50LG-3
|
|
Light Hazard
|
3
|
300
|
15
|
0.1
|
≤36
|
QHYB15-0.6-50LG-3
|
|
Light Hazard
|
3
|
300
|
15
|
0.1
|
≤50
|
QHYB15-0.8-50LG-3
|
|
Light Hazard
|
3
|
300
|
15
|
0.1
|
≤72
|
QHYB15-1.0-50LG-3
|
|
Light Hazard
|
3
|
300
|
15
|
0.1
|
≤100
|
QHYB15-1.2-50LG-3
|
| Users can select the appropriate model according to the parameters provided. | ||||||
OEM & Custom
We provide OEM/ODM customization for voltage (220V/380V/415V), pump models, and control systems. Optional stainless steel manifolds, HMI touch screen, and remote monitoring are available. All systems comply with ISO9001 and CE standards for export.
FAQs
- Q: What’s the advantage of the QHYB-LG system?
A: It provides constant pressure and energy-saving operation for high-rise and municipal water supply applications. - Q: What type of pump is used?
A: LG vertical multistage centrifugal pump, detachable design for easy maintenance. - Q: What’s the control accuracy?
A: ±0.02 MPa under variable frequency control. - Q: Can it serve firefighting and domestic water simultaneously?
A: Yes, combined systems are available for dual-purpose use. - Q: What’s the difference between variable frequency and air-pressure systems?
A: Variable frequency saves more energy and maintains precise pressure; air-pressure systems are simpler and more cost-effective. - Q: Do you provide OEM/ODM services?
A: Yes, full customization including branding, voltage, and control cabinet configuration. - Q: Which markets use this system?
A: Exported to Southeast Asia, the Middle East, and Africa for residential and municipal projects.