Product Overview
QHYB-GDL Variable Frequency Water Supply System (GDL) is an integrated constant-pressure water supply solution utilizing GDL vertical multistage centrifugal pumps, combined with variable frequency drive (VFD) control, pressure sensors, and PLC intelligent control for fully automated water supply regulation.
It addresses unstable pressure during fluctuating demand conditions, energy inefficiency in constant-speed operation, and manual intervention requirements in traditional pumping systems.
It is ideal for residential buildings, commercial complexes, municipal water supply systems, and industrial water distribution networks where stable pressure and energy efficiency are required.
Model Designation
Applications
• High-rise building water supply systems
• Residential and commercial complex water distribution networks
• Municipal secondary water supply systems
• Industrial water supply and distribution systems
• Automated control of water supply in public buildings and industrial facilities
Engineering Advantages
• VFD control optimizes pump operation by adjusting speed according to demand, reducing power consumption during low demand.
• PLC-based intelligent control system enables automatic operation, reducing manual interventions and improving system reliability.
• GDL vertical multistage centrifugal pumps provide reliable, high-efficiency performance with stable head delivery, even under varying flow rates.
• Integrated pressure sensor feedback ensures precise pressure regulation, maintaining stable water supply even in fluctuating demand situations.
• Energy-saving design by reducing pump speed during periods of low demand, minimizing energy waste.
System Components
The QHYB-GDL Variable Frequency Water Supply System includes the following main components:
• GDL vertical multistage centrifugal pump units
• Variable frequency drive (VFD) control system
• PLC intelligent control cabinet
• Pressure sensor feedback system
• Inlet and outlet valves
• Anti-vibration base and mounting frame
Technical Parameters
Service Conditions
Clean water or non-corrosive liquids
Indoor installation only
Operating Conditions
Flow rate: 10 – 200 m³/h
Head: 20 – 150 m
Power range: 3 – 75 kW
Speed: 2900 rpm
Liquid temperature: ≤ 80°C
Working pressure: ≤ 1.6 MPa
Detailed parameter tables are provided below.
Performance Parameters
| Applicable Buildings |
Spray Flow
(L/S) |
Operating Pressure
(MPa) |
Applicable Building Height
(m) |
Recommended Water Supply System Model
(Vertical Pump Set) |
||
| Building Type |
Design Spray Density
(L/min·m²) |
Operating Area
(m²) |
||||
| Industrial Buildings | 10 | 300 | 60 | 0.1 | ≤12 | QHYB60-0.24-125GDL-3 |
| Industrial Buildings | 10 | 300 | 60 | 0.1 | ≤24 | QHYB60-0.4-125GDL-3 |
| Industrial Buildings | 10 | 300 | 60 | 0.1 | ≤36 | QHYB60-0.6-125GDL-3 |
| Industrial Buildings | 10 | 300 | 60 | 0.1 | ≤50 | QHYB60-0.8-125GDL-3 |
| Industrial Buildings | 10 | 300 | 60 | 0.1 | ≤72 | QHYB60-1.0-125GDL-3 |
| Industrial Buildings | 10 | 300 | 60 | 0.1 | ≤100 | QHYB60-1.2-125GDL-3 |
| Storage Buildings | 15 | 300 | 90 | 0.1 | ≤12 | QHYB90-0.24-150CDL-3 |
| Storage Buildings | 15 | 300 | 90 | 0.1 | ≤24 | QHYB90-0.4-150CDL-3 |
| Storage Buildings | 15 | 300 | 90 | 0.1 | ≤36 | QHYB90-0.6-150CDL-3 |
| Storage Buildings | 15 | 300 | 90 | 0.1 | ≤50 | QHYB90-0.8-150CDL-3 |
| Storage Buildings | 15 | 300 | 90 | 0.1 | ≤72 | QHYB90-1.0-150CDL-3 |
| Storage Buildings | 15 | 300 | 90 | 0.1 | ≤100 | QHYB90-1.2-150CDL-3 |
| Moderate Hazard Class | 6 | 300 | 40 | 0.1 | ≤12 | QHYB40-0.24-100CDL-3 |
| Moderate Hazard Class | 6 | 300 | 40 | 0.1 | ≤24 | QHYB40-0.4-100CDL-3 |
| Moderate Hazard Class | 6 | 300 | 40 | 0.1 | ≤36 | QHYB40-0.6-100CDL-3 |
| Moderate Hazard Class | 6 | 300 | 40 | 0.1 | ≤50 | QHYB40-0.8-100CDL-3 |
| Moderate Hazard Class | 6 | 300 | 40 | 0.1 | ≤72 | QHYB40-1.0-100CDL-3 |
| Moderate Hazard Class | 6 | 300 | 40 | 0.1 | ≤100 | QHYB40-1.2-100CDL-3 |
| Light Hazard Class | 3 | 300 | 15 | 0.1 | ≤12 | QHYB15-0.24-65GDL-3 |
| Light Hazard Class | 3 | 300 | 15 | 0.1 | ≤24 | QHYB15-0.4-65GDL-3 |
| Light Hazard Class | 3 | 300 | 15 | 0.1 | ≤36 | QHYB15-0.6-65GDL-3 |
| Light Hazard Class | 3 | 300 | 15 | 0.1 | ≤50 | QHYB15-0.8-65GDL-3 |
| Light Hazard Class | 3 | 300 | 15 | 0.1 | ≤72 | QHYB15-1.0-65GDL-3 |
| Light Hazard Class | 3 | 300 | 15 | 0.1 | ≤100 | QHYB15-1.2-65GDL-3 |
| Users may select the appropriate model based on the parameters above. | ||||||
How to Select a Pump Model
• Determine the peak flow and total head requirements for your system
• Select the appropriate number of pumps based on system redundancy and operational continuity requirements
• Choose a variable frequency drive based on required automation level and power consumption targets
• Confirm the operating conditions such as temperature, pressure, and liquid type to ensure proper pump selection
Engineering Notes
• Pressure sensor installation should be carefully calibrated for accurate feedback
• Keep the pump speed within the optimal range to avoid energy inefficiency
• Excessive start/stop cycles should be avoided to prolong the life of the equipment
• Ensure proper NPSH to prevent cavitation and maintain pump efficiency
Compliance & Quality Assurance
• Factory testing of hydraulic performance for each pump unit
• PLC control system functionality test before shipment
• Electrical insulation and grounding verification
• Material traceability for wetted components
• Optional third-party inspection available
Safety Notice
• Do not operate under dry running conditions
• Ensure stable water supply before starting the system
• Do not exceed the rated pressure during operation
• Disconnect the power supply before performing maintenance
OEM & Customization
This system is customizable to meet specific project and installation requirements.
Available options include:
• Motor voltage & frequency
• PLC control logic customization
• Material selection for wetted parts
• Vibration damping and noise reduction solutions
• Multiple pump configuration for system redundancy
FAQs
Q: Can the system be integrated with existing water distribution networks?
A: Yes, it can be integrated using the PLC communication interface.
Q: What is the maximum working pressure?
A: The maximum working pressure is 1.6 MPa.
Q: Can multiple pumps operate together for higher capacity?
A: Yes, the system supports multi-pump operation for higher capacity.
Q: How does the VFD optimize energy consumption?
A: VFD adjusts pump speed to match actual demand, reducing energy consumption during low demand.
Q: What materials are available for wetted parts?
A: Common materials include stainless steel, cast iron, and bronze.
Q: Is the system suitable for outdoor installation?
A: The system is designed for