QHYX-DL Fire Booster and Pressure Stabilizing Equipment

Product Overview

The QHYX-DL Pressure Booster Water Supply System (equipped with the XBD_DL Vertical Multistage Fire Pump) is a tankless automatic water supply system designed to maintain stable pressure and reliable flow within firefighting and related water supply networks. The system ensures continuous pressure maintenance and compensates for demand fluctuations through the coordinated control of the pump unit and pressure stabilization device.

Model Designation

Key Features

• Provides constant pressure water supply with adjustable equipment.

• Pressure control accuracy is typically better than 0.02 MPa.

• Compared to traditional pneumatic systems, variable frequency control reduces energy consumption by about 20%, while offering lower startup current, reduced mechanical impact, and quieter low-speed operation.

Unit Description

• Pressure Boosting Standard: P1 is the minimum operating pressure of the unit, which must meet the required fire pressure at the system’s weakest point. For fire hydrant systems, P1 must ensure the nozzle provides effective spray coverage at the weakest moisture center.

• Calculation of P1: The flow rate used for friction and local loss calculations in the pipeline system should be the initial firefighting flow rate.

Additional Notes:

• Initial investment is relatively low, with a simple control logic, easy operation, and maintenance, making it suitable for projects with lower system complexity.

Engineering Summary

This system consists of a pump unit, automatic control system, and components for pressure boosting and stabilization. The pressure stabilization device stores hydraulic energy, compensating for slight water consumption and pipeline leakage. When water demand increases and network pressure drops, the control system automatically activates the pump unit to supply water. Under low flow conditions, a small auxiliary pump alternates with the main pump to enhance operational efficiency and further reduce overall energy consumption.

Applications

The QHYX-DL Pressure Booster and Pressure Stabilization Water Supply System is suitable for the following applications:

• Firefighting water supply systems

• Automatic sprinkler systems

• Domestic water supply systems

• Industrial water supply systems

Depending on the operational requirements, the system can be configured for domestic, firefighting, sprinkler, or combined domestic firefighting applications, ideal for medium and high-rise building projects.

System Configuration

System Components

• Main pump unit (configurable, capable of running 1–4 units or more simultaneously)

• Pressure boosting and stabilization devices (including small-flow auxiliary pump units)

• Automatic control system

• Supporting pipes and accessories

Water pumps are the core components of the water supply system. Pumps can be selected based on the required design flow and head, ensuring flexibility in configuration and reliable system performance.

Design Basis

1. The pressure booster and pressure stabilization device is a new type of fire-fighting booster and pressure stabilization unit designed according to the Ministry of Construction’s document No. 108 (August 1996) of the People’s Republic of China and complies with the standards of 98S205 (originally 98S176).

2. This device is designed to address the inability of high-level firefighting water tanks in temporary high-pressure firefighting water supply systems to meet the required static pressure at the most disadvantageous points, and therefore requires the installation of a booster facility.

3. This device is suitable for multi-story and high-rise building projects requiring booster station facilities for fire hydrant water supply systems and wet automatic sprinkler systems.

Selection and Operational Principles

Water Supply System Selection:

• The selection of an automatic water supply system should be 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 that require continuous flow but have relatively low demand.

  • 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 small flow auxiliary pumps, the main pump does not need to start under normal conditions, saving energy.

• Variable Frequency Water Supply Units: Provides 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 approximately 20% of energy, while also reducing mechanical impact 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

Ensure that the most disadvantaged points in the firewater supply network maintain the required firefighting pressure. By using the pressure settings of P1, P2, Ps1, and Ps2, the system operates under normal conditions while effectively saving energy.

Technical Conditions

Technical Specifications

• Working pressure of SQL pneumatic water tank: 0.6 MPa, 1.0 MPa, 1.6 MPa.

• Firewater storage volume of SQL pneumatic water tank: greater than 150 liters, 300 liters, 450 liters.

• Pressure stabilization water volume of SQL pneumatic water tank: greater than 50 liters.

• Pressure differential for buffer water volume of SQL pneumatic water tank: 0.02–0.03 MPa; pressure differential for pressure stabilization water volume: 0.05–0.06 MPa.

Service Conditions 

• Working pressure ratio: a/b value of 0.6–4.0.

• Environmental temperature of the unit: 5°C–40°C.

 Environmental Requirements

1. Fire hydrant system: nozzle flow of 2.5 liters or 5 liters/second, with effective spray lengths of 7 meters, 10 meters, and 13 meters.

2. Automatic sprinkler system: 1.0 liters/second per sprinkler, with a working pressure of 0.1 MPa.

Electrical Control Functions

1. The electrical control system provides automatic and manual modes and can be connected to the fire control center or fire pump room.

2. The system is configured with two jockey pumps (one standby, one operating), with automatic switching between them.

Operational Notes

1. The unit should be debugged by the manufacturer before operation. Once debugging is completed, the pneumatic water tank’s charging nozzle should not be tampered with to prevent air leaks.

2. During operation, the unit does not require dedicated operators, but periodic inspections are necessary.

Selection Guide

I. Pump Selection for Variable-Frequency Constant-Pressure Packaged Units

1. Selection of water supply height for variable-frequency constant-pressure packaged 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 packaged 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 density (L/min·m²)	Coverage area (m²)
Production building	10	300	60	0.1	≤12	QHYX60-0.24-100XBD-DL-3
Production building	10	300	60	0.1	≤24	QHYX60-0.4-100XBD-DL-3
Production building	10	300	60	0.1	≤36	QHYX60-0.6-100XBD-DL-3
Production building	10	300	60	0.1	≤50	QHYX60-0.8-100XBD-DL-3
Production building	10	300	60	0.1	≤72	QHYX60-1.0-100XBD-DL-3
Production 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.

Operating Manual

1. Equipment Overview

This pressure and stabilizing device is designed according to the Ministry of Construction of the People’s Republic of China document [1996]108, and complies with the requirements of 98S205 (formerly 98S176). The device is designed to solve the issue of high-level firewater tanks in temporary high-pressure fire-fighting water supply systems not meeting the required static pressure at the system’s disadvantageous points. The specialized pressure stabilization equipment (hereinafter referred to as “the device”) is designed for fire-fighting use. It is suitable for multi-story and high-rise building projects requiring pressure-boosting facilities, fire hydrant water supply systems, and wet automatic sprinkler systems, among other fire-fighting and domestic water supply systems.

2. Equipment Components & Design Parameters

This device consists of an SQL diaphragm air pressure tank, an XBD-GDL multi-stage fire hydrant pump, an electrical control box, instruments, pipe fittings, and other components. According to design standards, the air pressure tank’s working pressure is 0.6MPa, 1.0MPa, or 1.6MPa. The fire water storage capacity is 150L, 300L, or 450L, and the stabilizing water volume is greater than 50L. The differential pressure for the buffer water is 0.02–0.03MPa, while the differential pressure for the stabilizing water is 0.05–0.06MPa.

3. Working Principle & Functions

The device must fulfill two essential functions:

1. To ensure that the fire-fighting water supply system at the disadvantageous points always maintains the required pressure.

2. To ensure that the air pressure tank always stores 30 seconds’ worth of fire water. The device controls the operation of the pump according to the preset P1, P2, Ps1, and Ps2 pressure settings to achieve both pressure boosting and stabilization functions. P1 is the required pressure at the disadvantageous point for fire-fighting (MPa), P2 is the fire pump start pressure (MPa), Ps1 is the stabilizing pump start pressure (MPa), and Ps2 is the stabilizing pump stop pressure (MPa).

4. System Operation & Control

Based on the calculated required fire-fighting pressure P1, this is used as the air pressure tank’s charging pressure. The device then uses P2, Ps1, and Ps2 to control the operation of the stabilizing pump. If the pipeline system experiences leakage or pressure drops, the stabilizing pump will automatically add water to maintain pressure stability. In the event of a fire, the system pressure drops, triggering the fire pump to start and the stabilizing pump to stop, ensuring the pump operates at full capacity.

5. Equipment Classification & Maintenance

The device comes in several models, including the upper-mounted type (denoted as I) and lower-mounted type (denoted as II). It can also be configured as vertical (denoted as L) or horizontal (denoted as W), depending on the air pressure tank setup. For fire-fighting water supply systems, the device can be used for fire hydrant water supply (denoted as X), automatic sprinkler systems (denoted as Z), or a combination of both (denoted as XZ). Regular maintenance is required to ensure the device’s longevity and proper function. This includes checking the seals, oil seals, shaft sleeves, and other essential parts.

OEM & Custom

Chaodun Pump provides OEM & ODM customization for QHYX-DL fire pressure boosting equipment, including pump selection, control cabinet design, and pressure configuration. All systems comply with ISO9001, GB50045-95, and CECS76:95 standards, ensuring safety and performance for global projects.

FAQs

1. Q1: What is the QHYX-DL Fire Pressure Boosting Equipment used for?
   It provides automatic pressure stabilization and fire water supply for hydrant and sprinkler systems.
2. Q2: What are the control modes?
   Automatic and manual modes with full alarm and protection functions.
3. Q3: Can it be customized?
   Yes, pump type, pressure, and control configurations can be customized for different applications.
4. Q4: Does it comply with standards?
   Yes, it meets GB50045-95, CECS76:95, and ISO9001 standards.
5. Q5: What are the main components?
   Air pressure tank, multistage fire pump, dual stabilizing pumps, and intelligent control system.
6. Q6: How does it save energy?
   Optional variable frequency drive maintains constant pressure and reduces power consumption by 20%.
7. Q7: Does Chaodun Pump provide export documentation?
   Yes, CE/ISO certificates, test reports, and installation manuals are provided with all export orders.