Product Overview
QHYX-DL Automatic Pressure Water Supply Unit for Fire is an integrated fire pressure stabilization booster unit designed to maintain required static and dynamic pressure in fire hydrant and sprinkler systems.
It prevents pipeline pressure drop during standby conditions and compensates initial pressure loss before main fire pump start-up.
It is applied in high-rise buildings, commercial complexes, underground garages, and industrial fire protection pipe networks.
Model Designation
Applications
Typical Operating Scenarios
• Fire hydrant pipeline standby pressure maintenance in high-rise buildings
• Automatic sprinkler pipeline pressure compensation during micro-leakage
• Underground parking fire network with long horizontal pipeline distribution
• Industrial plant fire water ring-main pressure stabilization
• Fire protection systems requiring automatic start-stop control under small flow demand
Engineering Advantages
Structural Design Logic & Engineering Outcome
• Multistage vertical booster pump configuration ensures stable head output under low-flow standby conditions.
• Pressure tank and intelligent control cabinet form closed-loop automatic pressure regulation.
• Dual-pump alternating operation reduces frequent start-stop stress and improves system reliability.
• Integrated skid-mounted structure simplifies installation in confined fire pump rooms.
System Components
QHYX-DL Automatic Pressure Water Supply Unit for Fire ：
• Vertical multistage pressure stabilization pump(s)
• Pressure tank (air cushion type)
• Intelligent control cabinet with automatic pressure sensing
• Pressure transmitter and pipeline accessories
• Base frame and manifold assembly
Technical Specifications
Service Conditions
Applicable for clean water without solid particles in fire protection systems.
Designed for standby pressure maintenance and initial fire compensation duty.
Operating Conditions
Flow rate: m³/h
Head: m
Power range: kW
Speed: rpm
Liquid temperature: ≤
Working pressure: ≤
Detailed parameter tables are provided below.
Installation & Dimensions
Performance Data
一、Selection of pumps for variable-frequency constant-pressure packaged equipment
| 1. Selection of water supply height for variable-frequency constant-pressure packaged equipment | ||||||||||
| Equipment Head (m) | 20 | 26 | 32 | 40 | 50 | 60 | 70 | 80 | 100 | 120 |
| Water Supply Height (m) | 10 | 14 | 18 | 25 | 32 | 38 | 46 | 55 | 72 | 88 |
| 2. Selection of number of service households for variable-frequency constant-pressure packaged equipment | ||||||
| Equipment Flow (m³/h) | 6 | 12 | 18 | 25 | 36 | 50 |
| Number of Households | 20–30 | 40–60 | 60–100 | 100–150 | 150–200 | 200–300 |
| Equipment Flow (m³/h) | 75 | 100 | 150 | 200 | 250 |
| Number of Households | 400–500 | 600–1000 | 1000–1500 | 1500–2000 | 2000–3000 |
Performance Parameters
| Applicable Buildings | Spray Flow (L/s) | Sprinkler Operating Pressure (MPa) | Applicable Building Height (m) | Recommended Water Supply Model (Vertical Pump Group) | ||
| Building Type | Design Spray Density (L/min·m²) | Coverage Area (m²) | ||||
| Industrial building | 10 | 300 | 60 | 0.1 | ≤12 | QHYX60-0.24-100XBD-DL-3 |
| Industrial building | 10 | 300 | 60 | 0.1 | ≤24 | QHYX60-0.4-100XBD-DL-3 |
| Industrial building | 10 | 300 | 60 | 0.1 | ≤36 | QHYX60-0.6-100XBD-DL-3 |
| Industrial building | 10 | 300 | 60 | 0.1 | ≤50 | QHYX60-0.8-100XBD-DL-3 |
| Industrial building | 10 | 300 | 60 | 0.1 | ≤72 | QHYX60-1.0-100XBD-DL-3 |
| Industrial building | 10 | 300 | 60 | 0.1 | ≤100 | QHYX60-1.2-100XBD-DL-3 |
| Storage building | 15 | 300 | 90 | 0.1 | ≤12 | QHYX90-0.24-150XBD-DL-3 |
| Storage building | 15 | 300 | 90 | 0.1 | ≤24 | QHYX90-0.4-150XBD-DL-3 |
| Storage building | 15 | 300 | 90 | 0.1 | ≤36 | QHYX90-0.6-150XBD-DL-3 |
| Storage building | 15 | 300 | 90 | 0.1 | ≤50 | QHYX90-0.8-150XBD-DL-3 |
| Storage building | 15 | 300 | 90 | 0.1 | ≤72 | QHYX90-1.0-150XBD-DL-3 |
| Storage building | 15 | 300 | 90 | 0.1 | ≤100 | QHYX90-1.2-150XBD-DL-3 |
| Ordinary hazard | 6 | 300 | 40 | 0.1 | ≤12 | QHYX40-0.24-100XBD-DL-3 |
| Ordinary hazard | 6 | 300 | 40 | 0.1 | ≤24 | QHYX40-0.4-100XBD-DL-3 |
| Ordinary hazard | 6 | 300 | 40 | 0.1 | ≤36 | QHYX40-0.6-100XBD-DL-3 |
| Ordinary hazard | 6 | 300 | 40 | 0.1 | ≤50 | QHYX40-0.8-100XBD-DL-3 |
| Ordinary hazard | 6 | 300 | 40 | 0.1 | ≤72 | QHYX40-1.0-100XBD-DL-3 |
| Ordinary hazard | 6 | 300 | 40 | 0.1 | ≤100 | QHYX40-1.2-100XBD-DL-3 |
| Light hazard | 3 | 300 | 15 | 0.1 | ≤12 | QHYX15-0.24-65XBD-DL-3 |
| Light hazard | 3 | 300 | 15 | 0.1 | ≤24 | QHYX15-0.4-65XBD-DL-3 |
| Light hazard | 3 | 300 | 15 | 0.1 | ≤36 | QHYX15-0.6-65XBD-DL-3 |
| Light hazard | 3 | 300 | 15 | 0.1 | ≤50 | QHYX15-0.8-65XBD-DL-3 |
| Light hazard | 3 | 300 | 15 | 0.1 | ≤72 | QHYX15-1.0-65XBD-DL-3 |
| Light hazard | 3 | 300 | 15 | 0.1 | ≤100 | QHYX15-1.2-65XBD-DL-3 |
| Users can select appropriate models according to the parameters provided. | ||||||
How to Select a Pump Model
• Confirm required system standby pressure and minimum compensating flow rate.
• Calculate pipeline static head and friction loss under initial sprinkler discharge condition.
• Determine tank volume based on allowable start frequency and leakage rate.
• Verify installation space constraints inside fire pump room.
Engineering Notes
• The unit is designed for pressure stabilization, not as a primary firefighting pump.
• Control logic must coordinate with main fire pump start sequence.
• Tank pre-charge pressure must match system static pressure requirements.
• System layout should minimize dead zones to avoid pressure fluctuation.
Compliance & Quality Assurance
• Factory hydraulic performance test before shipment
• Pressure tank strength and leakage test
• Control cabinet functional simulation test
• Material certification for pressure-containing components
• Optional third-party inspection upon request
Safety Notice
• Do not operate without pressure tank pre-charge adjustment.
• Ensure electrical grounding of control cabinet before commissioning.
• Avoid dry-running of booster pump.
• Disconnect power before maintenance or inspection.
EM & Customization
This pump series supports engineered configuration and duty-based matching. Technical adjustments can be made according to system requirements and installation conditions.
Available options include:
• Motor voltage & frequency
• Mechanical seal type and configuration
• Wetted parts material selection
• Surface coating and corrosion protection
Configuration is determined based on duty point and project specifications.
FAQs
Q1: Can the unit operate under VFD control?
Yes, frequency control can be integrated into the control cabinet for precise pressure regulation.
Q2: What is the allowable maximum working pressure?
The maximum system working pressure is ≤ 1.6 MPa depending on configuration.
Q3: Is the booster pump designed for continuous duty?
It is designed for intermittent pressure stabilization under standby conditions.
Q4: How is start frequency controlled?
Start frequency is controlled through pressure tank capacity and pressure switch settings.
Q5: What sealing options are available?
Standard mechanical seal; material can be configured according to water quality.
Q6: What standards does the system comply with?
Manufactured according to relevant fire protection and pressure vessel standards applicable to project requirements.