QHYX-GDL Fire Sprinkler Water Supply Equipment

QHYX-GDL Fire Sprinkler Water Supply Equipment

QHYX-GDL Fire Sprinkler Water Supply Equipment | Tankless packaged booster set with pressure-maintaining module

  • Packaged architecture: Pump unit + control panel + pressure-maintaining module.
  • Automatic pressure maintenance: Diaphragm tank offsets leakage/demand, cuts main-pump starts.
  • Scalable configuration: Parallel multi-pump setup to match duty requirements.
  • Control options: Air-pressure or VFD constant-pressure; auto start on pressure drop.
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Product Overview

The QHYX-GDL Sprinkler Water Supply Unit (equipped with the XBD-GDL vertical multistage fire pump) is a tankless firefighting water supply system designed to automatically enhance and maintain pipeline pressure when network pressure is insufficient. By coordinating the operation of the pump group and pressure stabilization system, this unit ensures reliable water supply for fire suppression and sprinkler systems.

Model Designation

QHYX GDL Fire Sprinkler Water Supply Equipment typy1

Key Features

  • The XBD-GDL vertical multistage fire pump is the core pump type of the system, suitable for high-pressure environments such as high-rise buildings.
  • The unit adopts a modular design for easy installation and maintenance. The pressure tank design provides effective pressure enhancement and stabilization functions based on the required water volume and pressure.
  • The pneumatic pump provides stable pressure output and effectively reduces system energy consumption.

Engineering Summary

The system consists of a pump group, control system, and pressure boosting and stabilization units. The pressure stabilization device stores and maintains system pressure, compensating for small water consumption and normal pipeline leakage. When water demand increases and pipeline pressure drops, the control system automatically starts the pump group to provide water.

The main pump can operate alternately with a small flow auxiliary pump under low demand conditions, improving overall system efficiency and reducing energy consumption.

Applications

The QHYX-GDL Sprinkler Water Supply Unit is suitable for domestic water supply, firefighting systems, industrial water supply systems, and automatic sprinkler systems. Depending on operational requirements, the system can be configured as a domestic type, firefighting type, sprinkler type, or a combination type, meeting the water supply needs of multi-story and high-rise buildings.

System Configuration

System Components

  • Pump Group: Configurable to operate 1–4 pumps simultaneously or more.

  • Pressure Boosting and Stabilizing Units: Includes a small flow auxiliary pump group.

  • Control System: Coordinates pump operation to ensure stable pressure.

  • Associated Pipelines and Accessories: Ensures reliable system operation.

The core components of the system include standard pump models selected based on the required design flow rate and head, ensuring compatibility and stable operation across the entire unit.

Design Fundamentals

Design should be based on the required design flow rate and head, while considering the flow variation characteristics of the application. The system should select appropriate pumps and control systems based on different needs during the design process.

Selection and Operational Principles

Water Supply System Selection

  • Automatic water supply systems should be selected based on the design flow rate and required water pressure, while considering the characteristics of flow variation.

  • Continuous Systems
    Suitable for large hotels, restaurants, and industrial or mining enterprises where the demand is low but continuous flow is required.

  • Intermittent Systems
    Suitable for applications with small or near-zero flow, such as office buildings, commercial residential buildings, and certain process water systems.

Demand Applications

  • Fire Sprinkler Water Systems
    Pneumatic pressure water supply devices are recommended, as they can maintain continuous pressure and effectively compensate for pipeline leakage. By adding a small flow auxiliary pump, the main pump does not need to start under normal conditions, further saving energy.

  • Variable Frequency Water Supply Units
    Provide stable water pressure with adjustable pressure settings, with an accuracy of 0.02 MPa. Compared to traditional pneumatic water supply systems, variable frequency systems save about 20% of energy, while also reducing mechanical impacts and noise during low-speed operation.

Intermittent Applications

Suitable for applications with very low or near-zero flow, such as office buildings, commercial residential buildings, etc.

Operational Principles

The system ensures stable operation by configuring a small flow auxiliary pump and a variable frequency device, automatically adjusting based on demand.

Technical Specifications

Technical Specifications

  • Operating Pressure: 0.6 MPa, 1.0 MPa, 1.6 MPa.

  • Water Storage Volume: Fire water storage volume greater than 150L, 300L, 450L.

  • Pressure Stabilizing Water Volume: Greater than 50L.

  • Pressure Differential Requirements: Buffer water volume differential: 0.02–0.03 MPa; stabilizing water volume differential: 0.05–0.06 MPa.

Service Conditions

  • Ambient Temperature: 5°C to 40°C.

  • Water Source Requirements: Compatible with high-position water tanks or bottom-level water pools.

Environmental Requirements

The equipment operates stably under normal temperature and humidity conditions, suitable for most environments.

Electric Control Functions

The electric control system features both automatic and manual control functions and can be integrated with the firefighting control center to ensure rapid system activation during emergencies.

Operating Instructions

The operating system is user-friendly, with detailed operation and maintenance manuals to ensure the equipment runs efficiently and remains stable.

Selection Guide

I. Pump Selection for Variable-Frequency Constant-Pressure Water Supply Units

1. Selection of water supply height for the water supply unit
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 users served by the water supply unit
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 density
(L/min·m²)
Coverage area
(m²)
Production building
10
300
60
0.1
≤12
QHYX60-0.24-100XBD-GDL-3
Production building
10
300
60
0.1
≤24
QHYX60-0.4-100XBD-GDL-3
Production building
10
300
60
0.1
≤36
QHYX60-0.6-100XBD-GDL-3
Production building
10
300
60
0.1
≤50
QHYX60-0.8-100XBD-GDL-3
Production building
10
300
60
0.1
≤72
QHYX60-1.0-100XBD-GDL-3
Production building
10
300
60
0.1
≤100
QHYX60-1.2-100XBD-GDL-3
Storage building
15
300
90
0.1
≤12
QHYX90-0.24-150XBD-GDL-3
Storage building
15
300
90
0.1
≤24
QHYX90-0.4-150XBD-GDL-3
Storage building
15
300
90
0.1
≤36
QHYX90-0.6-150XBD-GDL-3
Storage building
15
300
90
0.1
≤50
QHYX90-0.8-150XBD-GDL-3
Storage building
15
300
90
0.1
≤72
QHYX90-1.0-150XBD-GDL-3
Storage building
15
300
90
0.1
≤100
QHYX90-1.2-150XBD-GDL-3
Ordinary hazard
6
300
40
0.1
≤12
QHYX40-0.24-100XBD-GDL-3
Ordinary hazard
6
300
40
0.1
≤24
QHYX40-0.4-100XBD-GDL-3
Ordinary hazard
6
300
40
0.1
≤36
QHYX40-0.6-100XBD-GDL-3
Ordinary hazard
6
300
40
0.1
≤50
QHYX40-0.8-100XBD-GDL-3
Ordinary hazard
6
300
40
0.1
≤72
QHYX40-1.0-100XBD-GDL-3
Ordinary hazard
6
300
40
0.1
≤100
QHYX40-1.2-100XBD-GDL-3
Light hazard
3
300
15
0.1
≤12
QHYX15-0.24-65XBD-GDL-3
Light hazard
3
300
15
0.1
≤24
QHYX15-0.4-65XBD-GDL-3
Light hazard
3
300
15
0.1
≤36
QHYX15-0.6-65XBD-GDL-3
Light hazard
3
300
15
0.1
≤50
QHYX15-0.8-65XBD-GDL-3
Light hazard
3
300
15
0.1
≤72
QHYX15-1.0-65XBD-GDL-3
Light hazard
3
300
15
0.1
≤100
QHYX15-1.2-65XBD-GDL-3
Users can select appropriate models according to the parameters provided.

Operating Manual

I. Equipment Overview

This booster and pressure stabilizing equipment is a newly developed fire-fighting booster and stabilizing system, designed based on the Ministry of Construction of the People’s Republic of China’s document [1996]108 issued in August 1996, and complies with the specifications of 98S205 (formerly 98S176).

The system is designed to address the issue where the height of the elevated fire water tank in temporary high-pressure fire-fighting water supply systems does not meet the required static pressure for the system’s low-pressure points. It is specifically designed as a fire-fighting booster and pressure stabilizing equipment (hereinafter referred to as “equipment”).

This equipment is suitable for multi-story and high-rise building projects that require booster facilities for fire hydrant water supply systems, wet automatic sprinkler fire-fighting systems, and various fire-fighting and potable water systems.

II. Equipment Components & Design Parameters

The equipment primarily consists of an SQL diaphragm-type air pressure tank, XBD-GDL multistage fire hydrant pump, electric control box, instruments, pipeline accessories, and other components.

The design follows the relevant technical standards outlined in “Fire Protection Design Standards for Civil Buildings” (GB50045-95) and “Air Pressure Water Supply Design Specifications” (CECS76:95).

The technical design conditions of the equipment include the following:

  • Working pressures of the air pressure tank: 0.6MPa, 1.0MPa, and 1.6MPa.

  • Firefighting water storage capacity: ≥150L, 300L, 450L.

  • Pressure stabilizing water volume: ≥50L.

  • Buffer water volume pressure difference: 0.02–0.03MPa.

III. Working Principle & Functions

The equipment must fulfill two essential functions:

  1. Maintain the required fire-fighting pressure at the system’s low-pressure points at all times.

  2. Ensure the air pressure tank always holds a 30-second fire-fighting water supply, using the set operating pressures (P1, P2, Ps1, Ps2) to control the pump’s operation, thereby achieving both boosting and stabilizing functions.

The air pressure tank used in the equipment operates at multiple working pressures and controls the starting and stopping of the pump to ensure stable operation of the fire-fighting system.

IV. System Operation Control

Based on the calculated required fire-fighting pressure P1, it serves as the air pressure tank’s charging pressure. The determined pressures of P2, Ps1, and Ps2 control the operation of the pressure stabilizing pump.

When leaks or other issues occur in the pipeline system, the pressure stabilizing pump will automatically start to replenish water, and stop once the set pressure is reached.

In the event of a fire, the reduction in water volume in the pipeline system will trigger the activation of the fire pump, and the pressure stabilizing pump will stop, ensuring full-load operation.

V. Equipment Classification & Maintenance

This equipment is available in different types: top-mounted (I), bottom-mounted (II), vertical (L), and horizontal (W). Selection should be based on actual needs.

Fire-fighting water supply systems can be configured as fire hydrant water supply systems (X), automatic sprinkler systems (Z), or a combination of both (XZ).

Regular maintenance should be carried out to ensure the equipment operates reliably over the long term. The equipment should undergo a scheduled inspection after 2500 hours of operation, with necessary parts such as seals, oil seals, and shaft sleeves replaced when required.

OEM & Custom

Chaodun Pump provides OEM/ODM customization for QHYX-GDL Fire Sprinkler Water Supply Equipment, including pump type, control cabinet configuration, and pressure settings. All products meet ISO9001, GB50045-95, and CECS76:95 standards, ensuring quality and safety for global export.

FAQs

  1. Q1: What is the QHYX-GDL Fire Sprinkler Water Supply Equipment used for?
    It supplies stable fire water pressure for sprinkler and hydrant systems in buildings and factories.
  2. Q2: What control modes are available?
    Automatic and manual modes with real-time monitoring and alarm linkage.
  3. Q3: What are the advantages of the variable frequency type?
    Precise constant pressure, energy efficiency, and smooth low-noise operation.
  4. Q4: Can the equipment be customized?
    Yes, pump configuration, pressure, and control systems can be tailored for different projects.
  5. Q5: What standards does it comply with?
    It meets GB50045-95, CECS76:95, and ISO9001 quality standards.
  6. Q6: What is included in the system?
    Fire pump, control cabinet, air tank, valves, and connecting pipelines.
  7. Q7: Does Chaodun Pump provide international documentation?
    Yes, all export models include CE/ISO certificates, test reports, and user manuals.