Product Overview of the 1.5 MPa Pressurized Hanging Dry Powder Fire Extinguishing System

I. Overview 

FZX-ACT X /1.5 The suspended-type dry‑powder fire‑extinguishing device (hereinafter referred to as the “fire‑extinguishing device”) is a next‑generation, highly efficient and environmentally friendly firefighting product. It is charged with… ABC Ultra-fine dry powder extinguishing agent is non-toxic and harmless, does not corrode protected materials, is non-irritating to human skin and respiratory tract, and delivers rapid, highly efficient fire suppression. 

This fire‑extinguishing system features a simple structure, reliable performance, and convenient installation and maintenance. It can be used for total flooding in enclosed spaces as well as for localized suppression in open areas, making it an ideal automatic fire‑extinguishing solution for hazardous environments such as urban utility tunnels, industrial and mining facilities, power plants, substations, and petrochemical plants. 

Standards for the Production and Testing of Fire Extinguishing Devices XF 602-2013 Dry Powder Fire Extinguishing System 

II. Scope of Application 

1 .   Firefighting A Class A fires: such as fires involving combustible solids like cotton, wood, hemp, paper, rubber, plastics, and tobacco. 

2 .   Firefighting B Class A fires: such as fires involving flammable liquids like crude oil, heavy oil, diesel, gasoline, and organic solvents, as well as combustible solids that can melt. 

3 .   Firefighting C Class C fires: such as fires involving flammable gases like coal gas, natural gas, acetylene, and others. 

4 .   Firefighting E Class A fires: such as fires involving energized equipment in computer rooms, substations, cable tunnels, cable trenches, and power compartments within urban utility tunnels. 

This device is not suitable for extinguishing fires involving the following substances: 

1.  Chemical substances such as nitrocellulose, explosives, nitrogen oxides, and fluorine, which can undergo oxidation reactions even in the absence of air, together with oxidizing agents; 

2.  Reactive metals such as potassium, sodium, magnesium, titanium, and zirconium, as well as their hydrides. 

Three .  Composition of the fire suppression system 

1 The fire-extinguishing system primarily consists of a powder storage tank, nozzles, a pressure indicator, a heat‑sensitive glass bulb, and a suspension ring, among other components. 

2 , Filling inside the powder tank ABC Ultra-fine dry powder extinguishing agent, with nitrogen as the propellant gas. 

3. Schematic Diagram of a Suspended Dry Powder Fire Extinguishing System

4. Model and Main Performance Parameters 

1 , Model and Main Performance Parameters Table ( 1 ) 

2. Model and Main Performance Parameters Table ( 2 )

Five . Working principle 

1 , Fire-extinguishing principle 

When a fire occurs, the heat‑sensitive glass bulb of the fire‑extinguishing device expands and shatters upon heating, releasing ultra‑fine dry powder under driving pressure. 1.5 MPa The role of high-purity nitrogen will be ultra-fine. Dry chemical fire extinguishing agent Ejected, ultra-fine dry powder Fire extinguishing agent Upon contact with flames, it extinguishes fires through both chemical and physical mechanisms. Ultrafine dry powder exerts a chemical inhibition effect on flaming combustion, an asphyxiating effect on smoldering combustion, and provides shielding against thermal radiation while delivering a cooling effect. The particle size of ultrafine dry powder is small ( 20 mu m Furthermore, it exhibits excellent fluidity and can remain suspended in the air for a certain period of time; therefore, it can be used for localized fire suppression in open spaces as well as for total flooding fire suppression in enclosed spaces. 

2、 Fire suppression system activation methods 

The device is simple and reliable to operate, offering three control modes: manual, system‑interlock, and temperature‑controlled start. 

( 1 ) Manual start 

When the fire suppression controller is set to the “Manual” position, the fire suppression system operates in manual control mode. In the event of a fire in the protected area, manually pressing the start button on the fire suppression controller or on the manual control panel will activate the system to discharge the extinguishing agent and suppress the fire. 

After the fire‑extinguishing system’s initiating device is powered on, it activates the impact mechanism, which shatters the glass bulb and opens the nozzle to discharge the extinguishing agent, thereby suppressing the fire. 

After the fire alarm control panel issues a start command, or after the start button is manually pressed, during the set delay period… 30s During this period, if personnel determine that no fire has occurred or that the fire has already been extinguished, they may press the emergency stop button to halt the activation of the fire suppression system. 

( 2 ) System Integration (Automatic Startup) 

When the fire suppression controller is set to the “Manual” position, the fire suppression system operates in manual mode. In the event of a fire in the protected area, manually pressing the start button on the fire suppression controller or the manual control panel will activate the system to discharge the extinguishing agent and carry out fire suppression. 

After the fire‑extinguishing system’s initiating device is powered on, it activates the impact mechanism, which shatters the glass bulb and opens the spray nozzle to discharge the extinguishing agent, thereby suppressing the fire. 

( 3 ) Temperature control activation 

When a fire occurs in the protected area and the ambient temperature rises to the nominal operating temperature of the heat‑sensing element, the fire‑extinguishing system automatically activates—regardless of whether the fire alarm control panel has issued a fire‑suppression command—to carry out fire suppression. 

Six . Application of Fire Extinguishing Systems 

1  The fire suppression system is suitable for both total flooding and local application fire suppression. 

2  During total flooding fire suppression, calculations shall be performed based on the conditions and dimensions of the protected space or object to select an appropriately sized extinguishing device, which shall be evenly distributed and suspended above the protected area. 

3  When applying fire suppression locally, select a fire‑extinguishing device of appropriate size based on the dimensions of the protected object, and mount it above the object to ensure that, during discharge, the extinguishing agent fully covers the protected material. 

4   Install in a protected zone. 3 When there are fewer than a certain number of fire-extinguishing devices, only the temperature‑controlled activation method may be used for initiation. If installed… 3 When there are more than one fire-extinguishing device, an electric‑control start-up method shall be employed. In the electric‑control start-up system, a temperature‑controlled start-up method shall also be provided. 

Seven . Fire suppression system installation 

( 1 ) Installation and Usage Instructions for Suspended Dry Powder Fire Extinguishing Systems 

1 • During product transportation, handling, and storage, dropping and rough loading/unloading are strictly prohibited. 

2 The fire suppression system must not be serviced while energized. If maintenance is required, the system’s power supply must be disconnected, and the system’s activation circuit must be shorted. 

3 , The safety current for the electric start of the fire-extinguishing system shall not exceed 150m A ;

4 , Task testing is prohibited without the authorization of the manufacturer’s representative; 

5 , Verify that the internal supply components in the inspection report are complete; 

6 , Check whether the device leads are shorted; 

( 2 ) Installation method for suspended dry powder fire suppression systems 

1.  There are two installation methods for fire suppression systems: 

1 ). Insert the expansion screw with a hook ( M12 ) Secure the unit to the precast concrete slab above the protected area, then hook the lifting ring at the top of the fire‑extinguishing device onto the bent anchor bolt. The activation module can be mounted on a nearby wall or ceiling, as shown in the figure. 

Eight .  Inspection and Maintenance of Fire Extinguishing Systems 

1.  The user unit shall establish a maintenance management system and assign a dedicated person to conduct regular inspections. 

2.  Fire extinguishing systems shall be inspected at least once every six months. Once a fire extinguishing system has been discharged, or when the pressure gauge pointer indicates the red zone, it must be recharged. 

3.  Each time it is refilled or every five years, it should be inspected. Fire extinguishing device cylinder Conduct a hydrostatic test. Any component that fails the hydrostatic test shall not be reused. 

4.  The extinguishing agent used during refilling must be ABC Ultra-fine dry powder extinguishing agent, and Shall comply with GB4066 -2017 Requirements. 

5.   Maintenance of fire-extinguishing equipment must be performed by a specialized manufacturer approved by the public security fire supervision authority. 

6.   Under normal conditions, the service life of the fire suppression system is 10 Year. 

Pressurized 1.5 MPa Hanging Dry Powder Fire Extinguishing System | Frequently Asked Questions

Q1: What types of locations are suitable for a 1.5 MPa stored-pressure suspended dry‑powder fire‑extinguishing system?

A1: Suitable for distribution rooms, small warehouses, generator rooms, and similar spaces; it can extinguish Class A, B, and C fires as well as initial electrical fires, but is not suitable for fires involving reactive metals.

Q2: What does a storage pressure of 1.5 MPa signify?

A2: Refers to the factory‑precharged pressure of the device; at ambient temperature, the storage pressure is 1.5 MPa. It is a stored‑pressure type, with the extinguishing agent maintained at this pressure inside the cylinder for long-term storage.

Q3: What startup methods are available for the device?

A3: Equipped with an automatic activation feature via a heat‑sensitive glass bulb, it can also be connected to an external alarm system for electrically‑triggered activation; certain models support manual emergency start-up.

Q4: What impact does dry powder discharge have on equipment?

A4: Dry powder leaves residual dust that can adhere to equipment surfaces, potentially contaminating sensitive electronic devices. It is suitable for general industrial equipment but is not recommended for use in precision‑critical data centers.

Q5: How long is the extinguishing agent’s shelf life, and does the cylinder require a hydrostatic pressure test?

A5: Dry chemical fire extinguishers are generally inspected and replaced every 5 years; pressure vessels must undergo periodic hydrostatic testing in accordance with relevant standards, and any that fail must be replaced.

Q6: If the gaps in the protected area are large, will this affect the fire suppression effectiveness?

A6: Yes. During discharge, close windows and ventilation openings as much as possible to minimize powder leakage and ensure that the protected area reaches the concentration required for fire suppression.

Q7: When the system is activated and discharges, are personnel permitted to remain within the protected area?

A7: No. During discharge, the dust can obstruct visibility and irritate the respiratory tract; personnel must evacuate in advance and re-enter only after thorough ventilation.

Q8: Can the device be disassembled and reassembled, and can dry powder extinguishing agent be refilled independently?

A8: No. Refilling of fire‑extinguishing agents and cylinder maintenance must be performed by an organization holding the requisite fire‑safety qualifications; unauthorized disassembly or reassembly may render the equipment inoperable.

Q9: Can a single suspended dry powder system protect multiple rooms?

A9: No, it does not support a pipeless design; each unit can only protect a single independent protected space. For multiple rooms, separate units must be installed for each room.

Q10: What routine maintenance checks should be performed?

A10: Regularly inspect the suspension for secure fastening, check the glass bulbs for damage, and ensure the pressure gauge is within the green zone; have the system inspected annually by a qualified maintenance provider.