External Pressure-Storage Heptafluoropropane Gas Fire Extinguishing System
The externally pressurized (pre-pressurized) heptafluoropropane fire suppression system consists of a fire extinguishing agent cylinder assembly, a propellant gas cylinder assembly, high-pressure metal hoses, check valves (for the extinguishing agent lines), a manifold, a safety relief device, a selection valve, a signal feedback device, extinguishing agent delivery pipelines, nozzles, a driver gas cylinder assembly, an electromagnetic actuator, driver gas pipelines, and check valves (for the driver gas lines), among other components. The transmission distance of an externally pressurized system generally does not exceed 250 meters.
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Detailed description
Overview
The externally pressurized (pre-pressurized) heptafluoropropane fire suppression system consists of a fire extinguishing agent cylinder assembly, a propellant gas cylinder assembly, high-pressure metal hoses, check valves (for the extinguishing agent lines), a manifold, a safety relief device, a selection valve, a signal feedback device, extinguishing agent delivery pipelines, nozzles, a driver gas cylinder assembly, an electromagnetic actuator, driver gas pipelines, and check valves (for the driver gas lines), among other components. The transmission distance of an externally pressurized system generally does not exceed 250 meters.
The gas fire-extinguishing agent storage cylinders for the pipeline-based heptafluoropropane fire suppression system are typically housed in a dedicated cylinder room. Connected via a piping network, these cylinders deliver the extinguishing agent from the cylinder room to the protected zones requiring fire suppression upon detection of a fire, where it is discharged through nozzles to extinguish the blaze. This system is ideal for large-scale buildings with multiple protected zones and can simultaneously protect up to eight separate zones.
Fire extinguishing principle
When the fire suppression system is in automatic control mode, if a fire occurs within the protected zone, the fire detectors will send a fire signal. The alarm control panel will immediately emit audible and visual alarms. Upon receiving two independent fire alarm signals, the gas fire suppression controller will issue a联动 (interlock) command to shut down the associated equipment. After a 30-second delay, the controller will issue a fire suppression command, opening the solenoid valve corresponding to the protected zone to release the extinguishing gas. The initiating gas, via the initiating pipeline, will open the corresponding selection valve and the container valve of the power cylinder assembly. The power cylinder will then drive the gas through a pressure-reducing device into the extinguishing agent cylinder assembly, simultaneously opening the container valve of the extinguishing agent cylinder assembly. This will deliver the extinguishing agent into the piping network, thereby initiating the fire suppression process.
Scope of application
● Suitable for extinguishing the following types of fires
● Electrical fire
● Liquid fires or fires involving fusible solids
● Solid surface fire
● Gas fires that can be extinguished by cutting off the gas supply before firefighting.
● Suitable for protecting enclosed spaces; typical locations include:
● Protection zones for fires involving explosive gases and liquids
● Libraries, archives, document and artifact repositories, etc.
● Oil-immersed transformers, switchgear rooms equipped with oil-filled switches, and premises housing standby generators, etc.
● Communication equipment rooms and electronic computer rooms, etc.
Basic Parameters
Model |
QMQ type |
Startup delay |
0–30 seconds (adjustable) |
|
Starting gas charging pressure (20℃) |
6MPa |
Protected area ambient temperature |
≥0℃ |
|
Ambient temperature of the cylinder room |
0℃~50℃ |
Jetting time |
≤10S |
|
Startup method |
Electric start |
DC 24V / ≤1.6A |
Fire extinguishing method |
Full submersion |
Pneumatic start |
Gas pressure ≥ 0.35 MPa |
Maximum protected area per zone |
800 m² |
|
Emergency mechanical start-up |
Mechanical operating force ≤ 150 N |
Maximum single-zone protection volume |
3600 m³ |
|
Drive gas |
Nitrogen |
Implementation standard |
Enterprise Standard Q/360500WK01-2020, GB 25972-2010 |
|
Product Model Specifications |
QMQ4.2 / (Fire Extinguishing Agent Bottle Group Volume) W-HZ |
QMQ5.6 / (Fire Extinguishing Agent Bottle Group Volume) W-HZ |
||||||
|---|---|---|---|---|---|---|---|---|
Fire extinguishing agent cylinder volume (L) |
90 |
120 |
150 |
180 |
90 |
120 |
150 |
180 |
Fire extinguishing agent storage pressure |
0.39 MPa (20℃) |
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Maximum working pressure |
5.3MPa |
8MPa |
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Fire extinguishing agent filling density |
1250 kg/m³ |
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| Note: The model designation for externally pressurized heptafluoropropane fire-extinguishing systems is as follows: For example, QMQ5.6/90W-HZ. In this designation: QM stands for gas fire-extinguishing equipment; Q stands for heptafluoropropane; QMQ refers to a pipeline-type heptafluoropropane fire-extinguishing system; 5.6 indicates a storage pressure of 5.6 MPa; 90 represents a fire-extinguishing agent cylinder volume of 90 liters; W denotes an externally pressurized system; and HZ is the Hezhi brand mark. | ||||||||
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