I. Overview

FFX-ACTX/ZY 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 manufacture and testing of fire-extinguishing devices GA602-2013 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.

III. Composition of the Fire Extinguishing System

The fire suppression system is an integrated unit comprising ultra-fine dry powder extinguishing agent, electric initiator, solid‑gas converter, pressure‑rated steel housing, six‑prong nozzle, aluminum diaphragm, and mounting bracket.

IV. Model and Main Performance Parameters

1 , Model and Main Performance Parameters Table ( 1 )

2 , Model and Main Performance Parameters Table ( 2 )

V. Operating Principle

1 , Fire-extinguishing principle

When the fire suppression system receives a start-up signal, the solid‑gas conversion agent is activated, causing the gas inside the container to expand rapidly and increasing the internal pressure. This pressure ruptures the nozzle diaphragm, propelling an ultra-fine dry powder into the protected area, where it quickly disperses in all directions, establishing a total flooding extinguishing condition. Under the continuous physical and chemical action of the ultra-fine dry powder, the flames are extinguished.

2、 Fire suppression system activation methods

The device is simple and reliable to operate, offering two control modes: manual and system‑interlocked.

( 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 carry out fire suppression.

After the fire‑extinguishing device’s initiating mechanism 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 “Automatic” mode, the fire suppression system operates in automatic control. Upon detection of a fire in the protected area, the controller, having confirmed the occurrence of a fire, will automatically activate the fire suppression system to discharge the extinguishing agent and initiate fire suppression.

After the fire‑extinguishing device’s initiating mechanism 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.

VI. Installation of Fire Extinguishing Systems

( 1 ) Installation and Operation 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 extinguishing systems

1. The installation methods for fire suppression systems are as follows:

Insert the expansion screw ( M10 ) Secure the mounting bracket to the precast concrete slab above the protected area, then insert the fire suppression device’s mounting foot into the fixed support and fasten it with screws, as shown in the figure.

7. 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 activated, it must be replaced.

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

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

5.   Under normal conditions, the service life of the fire-extinguishing device is 10 Year.

Non-Pressurized Suspended Dry Powder Fire Extinguishing System | Frequently Asked Questions

Q1: What types of locations are suitable for non‑pressurized suspended dry‑powder fire‑extinguishing systems?

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

Q2: What is a non‑pressurized type?

A2: The cylinder does not store high pressure under normal conditions; instead, it relies on the gas‑generating charge inside to generate pressure and propel the dry powder out, resulting in greater safety during transport and storage.

Q3: What startup methods are available for the device?

A3: It features automatic activation via a heat‑sensitive glass bulb, can also be connected to a fire alarm system for electric activation, and some models support manual emergency start-up.

Q4: Will the discharge of dry powder damage precision electronic equipment?

A4: Fire‑extinguishing dry powder leaves a dusty residue that can adhere to and contaminate components, making it unsuitable for protecting precision data centers and server equipment.

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

A5: Dry powder fire extinguishers are typically inspected and replaced every 5 years; the cylinder is stored at atmospheric pressure, so it does not require periodic hydrostatic testing like pressurized gas cylinders, but its components should be replaced upon expiration.

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

A6: Yes. Before discharge, close doors and windows and ventilation openings as much as possible to minimize powder leakage and ensure that the extinguishing concentration is achieved within the protected area.

Q7: During the discharge phase of the system, may personnel remain inside the protected area?

A7: No. Dry powder dust irritates the respiratory tract and obstructs visibility; personnel must evacuate in advance and may only re-enter after ventilation has been completed.

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

A8: No. Any replacement of fire‑extinguishing agents or maintenance of the system must be carried out by a qualified fire‑protection contractor; unauthorized operations may render the system inoperable.

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

A9: No, it is a standalone unit without a pipework system; each unit protects only a single protected space. For multiple rooms, multiple units must be installed.

Q10: What routine maintenance checks should be performed?

A10: Regularly inspect the secure attachment of the device, the integrity of the glass bulb, and the condition of the housing for any damage; have it tested annually by a qualified maintenance provider.