The ANWETECH Externally Pressurized FM200 Fire Suppression System is a professional clean agent fire extinguishing system designed for areas where water, foam, or powder extinguishing agents may damage valuable equipment, documents, or electronic assets.
This system is also known as an External-Pressure Fire Extinguishing System, External Storage FM200 Fire Suppression System, External Storage Pressure FM200 System, or Externally Pressurized HFC-227ea Fire Suppression System. It uses FM200, also known as HFC-227ea, as the fire extinguishing agent and nitrogen as the driving gas.
Unlike a conventional stored-pressure FM200 system, the ANWETECH externally pressurized FM200 system stores the extinguishing agent and the driving gas in separate cylinders. The FM200 agent is stored as liquid in the agent cylinder, while the nitrogen driving gas is stored in a separate high-pressure cylinder. When the system is activated, the separate nitrogen cylinder releases pressure through the regulating device and pushes the FM200 agent through the piping network and discharge nozzles.
This design makes it a Separate Pressure Source Fire Suppression System and a Separate Nitrogen Cylinder Fire Suppression System. Because the agent and nitrogen are not stored together under the same pressure, the system provides more stable agent conveyance, longer piping distance, better discharge pressure, and improved nozzle atomization.
For projects requiring long-distance piping, large protected volume, or centralized cylinder room design, the ANWETECH Nitrogen-Driven FM200 Fire Suppression System provides a reliable and flexible solution.
Product Working Principle:
In normal standby condition, the FM200 agent is stored in the agent cylinder without nitrogen pressurization. The driving gas is stored separately in a nitrogen cylinder.
When a fire is detected, the fire alarm and extinguishing control panel sends a release signal. The pilot gas cylinder or solenoid actuator activates the system. The nitrogen driving gas is released and regulated, then enters the agent cylinder. Under stable pressure, the nitrogen pushes the FM200 agent through the siphon tube, container valve, liquid check valve, manifold, selector valve, piping network, and finally discharges through nozzles into the protected area.
This working principle allows the system to function as a Nitrogen-Driven HFC-227ea Fire Suppression System, offering strong agent delivery performance for engineered gas suppression projects.
Key Advantages:
Typical Applications:
The ANWETECH Externally Pressurized Fire Suppression System is suitable for:
Data centers
Computer rooms
Server rooms
Control rooms
Power distribution rooms
Electrical rooms
Telecommunication rooms
Archive rooms
Libraries
Museums
Cultural relic storage areas
Precision medical equipment rooms
Industrial instrument rooms
Clean rooms
High-value asset storage areas
Large-volume protected spaces
Projects with long piping distance
Projects where the cylinder room is far from the protected area
Retrofit projects replacing Halon 1301 systems
Suitable Fire Types:
Electrical fires
Surface fires involving solid materials
Liquid fires
Gas fires where the gas supply can be shut off before discharge
Not Suitable For:
Fires involving oxidizing chemicals such as nitrocellulose or sodium nitrate
Fires involving reactive metals such as potassium, magnesium, sodium, titanium, zirconium, or uranium
Fires involving metal hydrides such as potassium hydride or sodium hydride
Fires involving self-decomposing chemicals such as hydrogen peroxide or hydrazine
System Composition:
The ANWETECH External-Storage HFC-227ea Fire Extinguishing System generally includes:
FM200 agent cylinder bank
Nitrogen driving gas cylinder bank
Pilot gas cylinder bank
Fire alarm and extinguishing control panel
Electromagnetic actuator
Pneumatic actuator
Pressure reducing device
Agent container valve
Driving gas container valve
Selector valve
Liquid check valve
Gas check valve
Low-leak high-seal valve
Safety relief valve
Signal feedback device
Manifold
Flexible hose
Control connection pipe
Piping network
Discharge nozzles
Manual release station
Emergency stop device
Audible and visual alarm devices
Cylinder rack and fixing bracket
Basic Technical Parameters:
Product type: Externally Pressurized FM200 System
Extinguishing agent: FM200 / HFC-227ea
System type: External-pressure / external-storage clean agent fire extinguishing system
Extinguishing method: Total flooding
Rated working pressure at 20°C: 4.2 MPa
Agent discharge time: ≤ 10 seconds
Agent cylinder volume: 90 L, 120 L, 150 L, 180 L
Maximum filling density: ≤ 1250 kg/m³
Driving gas: Nitrogen
Driving gas cylinder volume: 70 L
Driving gas storage pressure: 12 MPa
Pilot cylinder volume: 5 L
Pilot cylinder storage pressure: 6 MPa
Main power supply: AC 220 V, 50 Hz
Backup power supply: DC 24 V
Solenoid actuation voltage: DC 24 V
Automatic delay time: 0–30 seconds adjustable
Service temperature: 0–50°C
Control modes: Automatic, electrical manual, mechanical emergency manual
Agent Cylinder Options:
90 L FM200 agent cylinder: maximum agent quantity 112.5 kg
120 L FM200 agent cylinder: maximum agent quantity 150 kg
150 L FM200 agent cylinder: maximum agent quantity 187.5 kg
180 L FM200 agent cylinder: maximum agent quantity 225 kg
Control Modes:
Automatic Control
When the system is set to automatic mode, fire detectors send signals to the fire alarm and extinguishing control panel. After fire confirmation, the panel activates audible and visual alarms, starts linkage control, closes related ventilation or dampers, starts the delay countdown, and then releases the FM200 agent into the protected area.
Electrical Manual Control
When the system is in manual mode, personnel can press the release button on the controller or manual release station to start the suppression sequence.
Mechanical Emergency Manual Control
If the control panel cannot activate the system, trained personnel can use the mechanical emergency operation method to release the pilot gas, open the selector valve, open the agent cylinder valve, and discharge the FM200 agent.
Why Choose an Externally Pressurized FM200 System?
A conventional stored-pressure FM200 system stores the agent and nitrogen together in the same cylinder. This design is common for many standard projects, but it may have limitations when the piping distance is long or the protected area is large.
An Externally Pressurized FM200 System uses a separate nitrogen cylinder as the pressure source. This helps maintain stable pressure during discharge and improves the agent conveying capacity through the piping network.
For this reason, an external storage FM200 system is often selected for:
Long-distance discharge piping
Large protected rooms
Centralized cylinder room design
Multi-zone protection
Retrofit of older clean agent systems
Projects requiring better discharge stability
Projects requiring higher nozzle inlet pressure
Inspection and Maintenance:
To keep the FM200 fire suppression system reliable, regular inspection and maintenance are required.
Recommended inspection items include:
Check all cylinders, valves, hoses, nozzles, brackets, and piping for damage, looseness, leakage, blockage, corrosion, or deformation.
Check whether the access to the protected area, cylinder room, manual release device, and nozzles is clear.
Check the liquid level gauge of the FM200 agent cylinder.
Check all pressure indicators at least once every six months.
If the agent liquid level is lower than 90% of the design level, refill the agent according to the design requirement.
If the nitrogen pressure is below the required range, refill the nitrogen cylinder in time.
Carry out annual inspection for major system components.
Purge the piping and nozzles with compressed air or nitrogen every three years.
Carry out comprehensive system inspection and overhaul every five years, including strength test, tightness test, functional test, and replacement of seals or safety diaphragms when required.
Cylinder Room Requirements:
The cylinder room should be dry, ventilated, and easy to access.
Ambient temperature should be 0–50°C.
Avoid direct sunlight on the cylinder bank.
Do not store flammable, explosive, or corrosive substances in the cylinder room.
Avoid vibration and mechanical impact.
Cylinder banks should be installed in a dedicated room with low fire risk.
Keep cylinders away from heat sources.
Unauthorized personnel should not operate system components.
Safety Notice:
Before FM200 agent discharge, all personnel must evacuate the protected area within the preset delay time. After the fire is extinguished, the ventilation system should be started to exhaust residual gas. Personnel may enter only after confirming that the residual gas has been fully discharged. If entry is required before complete ventilation, proper breathing protection equipment must be used.
FAQ:
Q1: What is an External-Pressure Fire Extinguishing System?
A1: An External-Pressure Fire Extinguishing System is a gas fire suppression system where the extinguishing agent and the driving gas are stored separately. In an FM200 system, the nitrogen cylinder provides external pressure to push the FM200 agent through the piping network.
Q2: What is the difference between an Externally Pressurized FM200 System and a stored-pressure FM200 system?
A2: A stored-pressure FM200 system stores FM200 and nitrogen together in the same cylinder. An Externally Pressurized FM200 System stores FM200 and nitrogen separately, helping provide more stable discharge pressure and longer conveying distance.
Q3: Is this the same as an External Storage FM200 Fire Suppression System?
A3: Yes. External Storage FM200 Fire Suppression System, External Storage Pressure FM200 System, Externally Pressurized FM200 System, and Separate Nitrogen Cylinder Fire Suppression System are commonly used to describe this type of system.
Q4: Why does the system use a separate nitrogen cylinder?
A4: The separate nitrogen cylinder provides driving pressure during discharge. This makes the system a Nitrogen-Driven FM200 Fire Suppression System and helps improve agent conveying performance.
Q5: Is this system suitable for long-distance piping?
A5: Yes. The externally pressurized design is especially suitable for projects with long piping distance or where the cylinder room is far from the protected area.
Q6: Can it be used as a Total Flooding FM200 Fire Suppression System?
A6: Yes. The system is designed for total flooding applications. It discharges FM200 into the protected enclosure to reach the required extinguishing concentration.
Q7: Does FM200 leave residue after discharge?
A7: No. FM200 is a clean agent and leaves no residue after discharge, making it suitable for data centers, control rooms, archives, and electronic equipment rooms.
Q8: Is this system suitable for data centers?
A8: Yes. As a Total Flooding Clean Agent Fire Suppression System, it is suitable for data centers, server rooms, electrical rooms, control rooms, and other high-value equipment areas.
Q9: Can this system protect multiple zones?
A9: Yes. With selector valves and a combined distribution design, the system can be configured for multiple protected zones.
Q10: What control methods are available?
A10: The system supports automatic control, electrical manual control, and mechanical emergency manual control.
