QHYB-DL Variable Frequency Water Supply System

QHYB-DL Variable Frequency Water Supply System

QHYB-DL VFD Water Supply System | Multistage constant-pressure booster set

  • VFD constant-pressure: Stable pressure, energy-efficient control.
  • DL multistage pumps: Smooth low-speed boosting.
  • Multi-pump control: Staging/alternation to match demand.
  • Protection & alarms: Dry-run/low-pressure + overpressure signals.
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Product Overview

The QHYB-DL variable frequency constant pressure water supply unit, equipped with the DL vertical multistage centrifugal pump, is a modern tankless packaged water supply system. The system integrates the pump unit, automatic control system, and pressurization & pressure stabilizing devices, providing stable pipeline pressure while ensuring reliable water supply.

Model Designation

QHYB DL Variable Frequency Water Supply System type

Key Features

  • Tankless Packaging Structure: High system integration, reducing the need for traditional tanks, saving space and maintenance costs.

  • Multifunctional Adaptability: Supports pneumatic pressure and variable frequency operation modes, suitable for different flow and head requirements.

  • Efficient and Stable Operation: Optimizes low-flow conditions through pressure stabilizing devices or auxiliary pumps, improving overall system efficiency.

  • Ease of Maintenance: Simplified design and operation make installation, commissioning, and daily maintenance more convenient.

Engineering Summary

The QHYB-DL water supply unit uses the DL vertical multistage centrifugal pump as the core supply equipment. The system is configured according to the required design flow and total head. The pressurization and pressure stabilizing device stores energy and effectively compensates for pipeline pressure drop, ensuring smooth operation of the pump.

Typical Applications

The QHYB-DL variable frequency constant pressure water supply unit is widely used in the following fields:

  • Residential and Industrial Water Supply Systems

  • Firefighting and Sprinkler Systems

  • Irrigation and Water Distribution
    This system meets continuous flow applications (such as hotels, catering facilities, industrial and mining enterprises) and intermittent flow applications (such as office buildings, commercial and residential buildings, and certain process water systems), while considering seasonal and regional variations in water demand.

System Configuration

The QHYB-DL variable frequency constant pressure water supply unit includes the following components:

  • Pump Unit: Includes main pumps and optional auxiliary pumps to meet different flow and head requirements.

  • Automatic Control System: Manages system automatic start/stop control and operational mode switching.

  • Pressurization & Pressure Stabilizing Device: Stores energy and maintains pipeline pressure, ensuring system stability.

Components & Supply

The main components of the QHYB-DL water supply unit include:

  • DL Vertical Multistage Centrifugal Pump Unit (Main pump and optional auxiliary pumps)

  • Automatic Control System

  • Pressurization & Pressure Stabilizing Device

  • Pipeline Connections and Packaging Components

Technical Service

The system provides comprehensive technical support and services, including:

  • Installation & Commissioning: Full support for smooth installation and commissioning of the system.

  • Maintenance & Servicing: Regular inspection and maintenance services to ensure long-term, stable operation.

  • Training & Technical Support: Training for operators on system operation and maintenance.

Operating Conditions

System selection should be based on the following engineering parameters:

  • Design Water Supply Flow

  • Required Supply Pressure (Total Head)

  • Flow Variation Type (Continuous or Intermittent)

  • Seasonal and Regional Variations in Water Demand

Service Conditions

For fire protection sprinkler systems, it is typically recommended to use a pneumatic pressure water supply system, possibly with auxiliary low-flow pumps, to compensate for normal pipeline leakage.

Protection Functions

The system is equipped with comprehensive protection functions, including:

  • Overload Protection

  • Low-Flow Protection

  • High Pressure Protection
    These protective features ensure safe and stable operation under various operating conditions.

Selection Criteria

When selecting the QHYB-DL variable frequency water supply unit, the following standards should be considered:

  • Design Water Supply Flow: Ensure the system can handle the maximum flow requirement and choose the appropriate pump unit.

  • Required Supply Pressure: Select pumps and control systems that can provide the required pressure.

  • Flow Variation Type: Choose the operation mode based on whether continuous or intermittent flow is required.

  • Seasonal and Regional Differences: Consider seasonal fluctuations and regional water usage differences, and select the appropriate configuration and materials.

Specifications & Installation

Selection & Sizing Guide

I. Pump selection for variable-frequency constant-pressure water supply units

1. Selection of water supply height for variable-frequency constant-pressure water supply units
Unit 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 households served by variable-frequency constant-pressure water supply units
Unit flow rate (m³/h)
6
12
18
25
36
50
Number of households served
20–30
40–60
60–100
100–150
150–200
200–300

 

Unit flow rate (m³/h)
75
100
150
200
250
Number of households served
400–500
600–1000
1000–1500
1500–2000
2000–3000

Performance Parameters

Applicable Building
Sprinkler flow rate
(L/s)
Operating pressure
at sprinkler head
(MPa)
Applicable building height
(m)
Recommended water supply unit model
Vertical pump set
Building type
Design sprinkler intensity
(L/min·m²)
Coverage area
(m²)
Production building
10
300
60
0.1
≤12
QHYB60-0.24-100DL-3
Production building
10
300
60
0.1
≤24
QHYB60-0.4-100DL-3
Production building
10
300
60
0.1
≤36
QHYB60-0.6-100DL-3
Production building
10
300
60
0.1
≤50
QHYB60-0.8-100DL-3
Production building
10
300
60
0.1
≤72
QHYB60-1.0-100DL-3
Production building
10
300
60
0.1
≤100
QHYB60-1.2-100DL-3
Storage building
15
300
90
0.1
≤12
QHYB90-0.24-150DL-3
Storage building
15
300
90
0.1
≤24
QHYB90-0.4-150DL-3
Storage building
15
300
90
0.1
≤36
QHYB90-0.6-150DL-3
Storage building
15
300
90
0.1
≤50
QHYB90-0.8-150DL-3
Storage building
15
300
90
0.1
≤72
QHYB90-1.0-150DL-3
Storage building
15
300
90
0.1
≤100
QHYB90-1.2-150DL-3
Ordinary hazard
6
300
40
0.1
≤12
QHYB40-0.24-100DL-3
Ordinary hazard
6
300
40
0.1
≤24
QHYB40-0.4-100DL-3
Ordinary hazard
6
300
40
0.1
≤36
QHYB40-0.6-100DL-3
Ordinary hazard
6
300
40
0.1
≤50
QHYB40-0.8-100DL-3
Ordinary hazard
6
300
40
0.1
≤72
QHYB40-1.0-100DL-3
Ordinary hazard
6
300
40
0.1
≤100
QHYB40-1.2-100DL-3
Light hazard
3
300
15
0.1
≤12
QHYB15-0.24-65DL-3
Light hazard
3
300
15
0.1
≤24
QHYB15-0.4-65DL-3
Light hazard
3
300
15
0.1
≤36
QHYB15-0.6-65DL-3
Light hazard
3
300
15
0.1
≤50
QHYB15-0.8-65DL-3
Light hazard
3
300
15
0.1
≤72
QHYB15-1.0-65DL-3
Light hazard
3
300
15
0.1
≤100
QHYB15-1.2-65DL-3
Users can select appropriate models according to the parameters provided.

OEM & Custom

Chaodun Pump provides OEM and ODM customization, including pump configuration, control software, tank capacity, and material options to match different water supply applications such as residential buildings, factories, and municipal projects.

FAQs

  1. Q1: What is the QHYB-DL system used for?
    It provides automatic constant pressure water supply for residential, industrial, and firefighting systems.
  2. Q2: What type of pumps does it use?
    DL vertical multistage centrifugal pumps.
  3. Q3: What are the advantages?
    Energy saving, automatic control, and stable constant pressure.
  4. Q4: Can multiple pumps operate together?
    Yes, 1–4 pumps can run in parallel for larger capacity systems.
  5. Q5: What industries use this equipment?
    Municipal water supply, building water systems, manufacturing, and firefighting.
  6. Q6: Is OEM customization available?
    Yes, Chaodun Pump provides full OEM/ODM customization services.
  7. Q7: What control options are supported?
    Variable frequency control and air pressure control configurations are available.