PRI-SAFETY Design Drawing
Engineering Capability
PRI-SAFETY provides complete engineering services including:
Hydraulic Calculation
Nozzle Distribution Design
Pipe Network Calculation
Installation Guidance
Remote Technical Assistance
Our engineering team supports projects according to NFPA 750 and customer project specifications.
Why More EPC Contractors Are Choosing High Pressure Water Mist Systems
Minimal Water Damage:
High pressure water mist systems use significantly less water compared with conventional sprinklers, helping protect sensitive equipment, electronic assets and valuable property.
Rapid Cooling Effect:
The fine droplets evaporate rapidly and absorb large amounts of heat, reducing temperatures quickly and preventing fire spread. Excellent Re-Ignition Prevention:
The cooling effect continues after flame knockdown, minimizing the risk of re-ignition.
Safe for Occupied Areas:
Water mist systems use only clean water without toxic chemicals or harmful gases, making them suitable for occupied spaces.
Environmentally Friendly:
No PFAS, no greenhouse gases and zero ozone depletion potential.
Reduced Installation Cost:
Smaller pipe diameters and reduced water storage requirements lower installation costs compared with conventional sprinkler systems.
Installation Case For Data center:
Typical Project References
Our water mist systems have been supplied for:
Data Centers
Industrial Plants
Marine Projects
Government Buildings
Heritage Protection Projects
In countries: Algeria, Nigeria, Congo, Gambia, Zambia, Peru, Mongolia, Vietnam, Saudi Arabia, United Arab Emirates, Indonesia, Bangladesh, Kazakhstan, Kyrgyzstan, Pakistan, and others.
Product Specification
Typical System Components
* High Pressure Pump Unit ( also can be equiped with Danfoss Pump, FM certificate)
* Water Storage Tank
* Stainless Steel Pipe Network
* Section Valve Assemblies
* High Pressure Water Mist Nozzles
* Fire Detection System
* Fire Alarm Control Panel
Quality Assurance
Every system undergoes: Incoming Material Inspection/Pressure Testing/Functional Testing/Final Quality Inspection Available documents include: Technical Datasheets/Hydraulic Calculation Reports/General Arrangement Drawings/Operation Manuals
Pump Pressurized Type Water Mist Fire System (Single Pump-112L/min, 134L/min, 168L/min)
|
Pump Pressurized Type Water Mist Fire System (Single Pump-112L/min, 14MPa, 30kw) |
|||||
|
Code Number |
Working Pressure |
Flow(L/Min) |
Pump Speed(r/Min) |
Dimension(mm) |
Note |
|
WM/PRI-112/14 |
14MPa |
112 |
147 |
2200x1200x2000 |
One Work One Reserve |
|
WM/PRI-224/14 |
14MPa |
224 |
1470 |
2650x1200x2000 |
Two Work One Reserve |
|
WM/PRI-336/14 |
14MPa |
336 |
1470 |
2650x1200x2000 |
Three Work One Reserve |
|
WM/PRI-448/14 |
14MPa |
448 |
1470 |
3100x1200x2000 |
Four Work One Reserve |
|
WM/PRI-560/14 |
14MPa |
560 |
1470 |
3100x1200x2000 |
Five Work One Reserve |
|
WM/PRI-672/14 |
14MPa |
672 |
1470 |
3550x1200x2000 |
Six Work One Reserve |
|
WM/PRI-784/14 |
14MPa |
784 |
1470 |
3550x1200x2000 |
Seven Work One Reserve |
Nozzle Type( Open Type & Closed Type)
1. Open Type Nozzle
The open water mist nozzle is made of austenitic stainlesssteel and consists of a shell, a nozzle, etc. Its core component is a plurality of centrifugal nozzles installed on the conical surface of the shell. The atomization mechanism is to utilize the rotating liquid produced by the swirling parts in the nozzle to accelerate and eject the hollow diffusion cone-shaped liquid film through the outlet channel, and use the speed difference between the liquid and the outside air to break up and atomize.
While on stand-by, our system boasts dry piping for maximum efficiency. Activation can be achieved manually or through the sensors that detect heat, smoke, or flames - tailored to your specific needs. Our nozzles are thoughtfully grouped in sections, so upon activation, all nozzles within the selected section will be released for optimal fire suppression.
Technical Parameters for Open Type Water Mist Nozzle
| Code Number | Flow Rate(K) | Working Pressure(Mpa) | WorkingFlow(L/Min) |
| PRI/WM-N/T0.3/10 | 0.3 | 10.0-14.0 | 3.0-3.5 |
| PRI/WM-N/T0.5/10 | 0.5 | 10.0-14.0 | 5.0-5.9 |
| PRI/WM-N/T0.7/10 | 0.7 | 10.0-14.0 | 7.0-8.3 |
| PRI/WM-N/T0.9/10 | 0.9 | 10.0-14.0 | 9.0-10.6 |
| PRI/WM-N/T1.0/10 | 1.0 | 10.0-14.0 | 10.0-11.8 |
| PRI/WM-N/T1.2/10 | 1.2 | 10.0-14.0 | 12.0-14.2 |
| PRI/WM-N/T1.5/10 | 1.5 | 10.0-14.0 | 15.0-17.7 |
| PRI/WM-N/T1.7/10 | 1.7 | 10.0-14.0 | 17.0-20.1 |
| PRI/WM-N/T2.0/10 | 2.0 | 10.0-14.0 | 20.0-23.7 |
| PRI/WM-N/T2.5/10 | 2.5 | 5.0-10.0 | 12.5-29.6 |
| PRI/WM-N/T3.0/10 | 3.0 | 5.0-10.0 | 15.0-35.5 |
| PRI/WM-N/T3.5/10 | 3.5 | 5.0-10.0 | 17.5-41.4 |
| PRI/WM-N/T4.0/10 | 4.0 | 3.5-10.0 | 14.0-47.3 |
| PRI/WM-N/T4.5/10 | 4.5 | 3.5-10.0 | 15.8-53.2 |
| PRI/WM-N/T5.0/10 | 5.0 | 3.5-10.0 | 17.5-59.2 |
| PRI/WM-N/T5.5/10 | 5.5 | 3.5-10.0 | 19.3-65.1 |
2. Closed Type Nozzle
The closed water mist nozzle is made of austenitic stainless steel and consists of a shell, a nozzle, a temperature-sensitive glass ball, etc. Its core component is a plurality of centrifugal nozzles installed on the conical surface of the shell. The atomization mechanism is to utilize the rotating liquid produced by the swirling parts in the nozzle to accelerate and eject the hollow diffusion cone-shaped liquid film through the outlet channel, and use the speed difference between the liquid and the outside air to break up and atomize.
While in standby mode, our system maintains a pipe pressure of approximately 12 bar. Once the temperature surpasses 57°C, the heat-sensitive glass bulbs integrated into the nozzle heads will begin to melt. As a result, the high-pressure pump will be automatically activated, forcing water through high-pressure nozzles (60 or 100 bar, depending on nozzle type) to produce a fine mist. Only those nozzles with melted bulbs will activate, ensuring that only the affected area is actively sprayed.
Technical Parameters for Closed Type Water Mist Nozzle
| Code Number | Flow Rate(K) | Working Pressure(Mpa) | WorkingFlow(L/Min) |
| PRI/WM-N/T0.3/10-57ºC φ2 | 0.3 | 10.0-14.0 | 3.0-3.5 |
| PRI/WM-N/T0.5/10-57ºC φ2 | 0.5 | 10.0-14.0 | 5.0-5.9 |
| PRI/WM-N/T0.7/10-57ºC φ2 | 0.7 | 10.0-14.0 | 7.0-8.3 |
| PRI/WM-N/T0.9/10-57ºC φ2 | 0.9 | 10.0-14.0 | 9.0-10.6 |
| PRI/WM-N/T1.0/10-57ºC φ2 | 1.0 | 10.0-14.0 | 10.0-11.8 |
| PRI/WM-N/T1.2/10-57ºC φ2 | 1.2 | 10.0-14.0 | 12.0-14.2 |
| PRI/WM-N/T1.5/10-57ºC φ2 | 1.5 | 10.0-14.0 | 15.0-17.7 |
| PRI/WM-N/T1.7/10-57ºC φ2 | 1.7 | 10.0-14.0 | 17.0-20.1 |
| PRI/WM-N/T2.0/10-57ºC φ2 | 2.0 | 10.0-14.0 | 20.0-23.7 |
| PRI/WM-N/T2.5/10-57ºC φ2 | 2.5 | 5.0-10.0 | 12.5-29.6 |
| PRI/WM-N/T3.0/10-57ºC φ2 | 3.0 | 5.0-10.0 | 15.0-35.5 |
| PRI/WM-N/T3.5/10-57ºC φ2 | 3.5 | 5.0-10.0 | 17.5-41.4 |
| PRI/WM-N/T4.0/10-57ºC φ2 | 4.0 | 3.5-10.0 | 14.0-47.3 |
| PRI/WM-N/T4.5/10-57ºC φ2 | 4.5 | 3.5-10.0 | 15.8-53.2 |
| PRI/WM-N/T5.0/10-57ºC φ2 | 5.0 | 3.5-10.0 | 17.5-59.2 |
| PRI/WM-N/T5.5/10-57ºC φ2 | 5.5 | 3.5-10.0 | 19.3-65.1 |
Water Supply System
SUS304 Big Water Tank
Working Diagram
How does NFPA750 High Pressure Water Mist System Works
A High Pressure Water Mist Fire Suppression System extinguishes fire by converting water into millions of microscopic droplets using specially designed high-pressure pumps and precision-engineered nozzles. These droplets have an exceptionally large surface area compared to conventional sprinkler water streams, allowing them to absorb heat rapidly.
When exposed to fire, the droplets quickly evaporate into steam. This process removes a significant amount of heat from the fire while simultaneously reducing the oxygen concentration around the flame. In addition, the dense mist blocks radiant heat, helping prevent fire spread to nearby combustible materials. Unlike conventional sprinklers that primarily cool burning materials, water mist attacks the fire from multiple directions. This results in faster fire control with significantly less water usage. The system consists of a high-pressure pump unit, water storage tank, stainless steel piping, high-pressure nozzles, sectional control valves, and a fire detection and control system. Once a fire is detected, only the affected zone is activated, minimizing unnecessary water discharge.
This technology is recognized under NFPA 750 and is widely adopted in industrial, marine, commercial, and critical infrastructure applications.
* Fire Detection: Sensors trigger the system upon detecting fire.
* Pump Activation: The pump pressurizes water, pushing it through nozzles.
* Mist Generation: Nozzles atomize water into a fine mist, creating a cooling effect through evaporation and
displacing oxygen with steam.
The working principles of a pump-pressurized high-pressure water mist fire system revolve around atomizing water into ultra-fine droplets and leveraging their unique properties to suppress fires through rapid cooling, oxygen
displacement, and heat radiation blocking.
1. Open Type Nozzle Water Mist Fire System Design Drawing
2. Closed Type Nozzle Water Mist Fire System Design Drawing
Product Application
What High Pressure Water Mist Fire System can be used for:
* Data centers and IDC facilities
* Server rooms and UPS rooms
* Electrical switchgear rooms
* Power control rooms
* Telecommunication facilities
* Industrial automation systems
* Petrochemical control rooms
* Archives, libraries and laboratories
These places often store high-value equipment and materials, and once a fire occurs, the consequences can be unimaginable. Therefore, using a fine water mist fire extinguishing system can quickly extinguish the fire source in the early stages of a fire and protect important assets.High efficiency in the suppression of a wide variety of fires
Data Center Fire Protection
Protect:
* Server Rooms
* UPS Rooms
* Battery Rooms
* Switchgear Rooms
* Electrical Distribution Rooms
* AI Computing Centers
Keywords covered:
Data Center Fire Protection, Server Room Fire Suppression, AI Data Center Fire System, Hyperscale Data Center Fire Protection.
Battery Energy Storage Systems (BESS)
Designed to address:
* Thermal Runaway
* Fire Spread Between Battery Racks
* Exposure Protection
* Cooling Requirements
Keywords covered:
BESS Fire Suppression System, Lithium Battery Fire Protection, Battery Energy Storage Fire System.
Cable Tunnel Fire Protection
Suitable for:
* Utility Tunnels
* Cable Galleries
* Underground Infrastructure
* Metro and Railway Tunnels
Keywords covered:
Cable Tunnel Fire Protection, Utility Tunnel Fire Suppression, Tunnel Fire Protection System.
Transformer and Substation Protection
Ideal for:
* Transformer Rooms
* Electrical Substations
* GIS Rooms
* Control Rooms
Keywords covered:
Transformer Fire Protection, Electrical Substation Fire Protection, Power Plant Fire Protection.
Marine Applications
Applications include:
* Engine Rooms
* Machinery Spaces
* Pump Rooms
* Cargo Spaces
Keywords covered:
Marine Water Mist System, Engine Room Fire Protection, Marine Fire Suppression System.
Historical Buildings and Museums
Suitable for:
* Museums
* Archives
* Libraries
* Heritage Buildings
Keywords covered:
Museum Fire Protection, Historical Building Fire Protection, Archive Fire Suppression System
FAQ
1. What is a High Pressure Water Mist Fire Suppression System?
High Pressure Water Mist Fire Suppression System uses water at 100–140 bar to produce ultra-fine droplets that rapidly cool flames, reduce oxygen around the fire, and block radiant heat. Compared with conventional sprinklers, it uses up to 90% less water, minimizing water damage while providing fast and effective fire suppression. It is widely used in data centers, electrical rooms, machinery spaces, marine vessels, tunnels, hotels, and industrial facilities.
2. How does a High Pressure Water Mist System work?
The system delivers high-pressure water through specially designed nozzles, creating millions of fine droplets. These droplets absorb heat quickly, evaporate into steam, reduce oxygen around the fire, and suppress radiant heat, allowing fires to be controlled rapidly with minimal water usage. The system typically includes a pump unit, water tank, piping, nozzles, valves, and an automatic fire detection and control system.
3. Why choose Water Mist instead of traditional sprinklers? Water mist systems use significantly less water while providing efficient fire suppression. They reduce water damage, require smaller pipes and water tanks, and are ideal for protecting valuable equipment such as servers, electrical cabinets, machinery, and archives. For applications where business continuity is important, water mist is often a better choice than traditional sprinklers.
4. Can Water Mist protect electrical equipment? Yes. High Pressure Water Mist Systems are commonly used in electrical rooms, UPS rooms, switchgear rooms, transformer rooms, and data centers. The fine water droplets help suppress fires while reducing the risk of damage compared with conventional sprinklers. System design should always comply with applicable standards and manufacturer approvals.
5. Can Water Mist be used for lithium battery fire protection? Yes. Water mist is increasingly used in Battery Energy Storage Systems (BESS), EV charging stations, battery factories, and electric vehicle parking areas. It effectively cools battery modules, suppresses flames, and helps limit thermal runaway propagation. The final system design should be based on battery type, application, and fire testing.
6. How much water does a Water Mist System use? A High Pressure Water Mist System typically uses 70–90% less water than a conventional sprinkler system. Lower water consumption means smaller water tanks, reduced cleanup, less downtime, and better protection for sensitive equipment after a fire.
7. Where can High Pressure Water Mist Systems be used? Water mist systems are suitable for a wide range of applications, including: Data Centers Battery Energy Storage Systems (BESS) Marine Engine Rooms Electrical Rooms Machinery Spaces Hotels Hospitals Museums Archives Tunnels Airports Industrial Plants Each system should be designed according to the specific fire hazard.
8. Is Water Mist environmentally friendly? Yes. Water mist uses clean water as the extinguishing agent and contains no fluorinated chemicals. It leaves no chemical residue, consumes less water than conventional sprinklers, and supports sustainable fire protection for modern buildings and industrial facilities.
10. Why choose PRI-SAFETY High Pressure Water Mist Systems? PRI-SAFETY provides complete water mist fire protection solutions, including system design,(NFPA750 Standard) pump units, stainless steel piping, nozzles, control panels, installation guidance, and technical support. We offer customized solutions for commercial, industrial, marine, transportation, and critical infrastructure projects, helping customers achieve reliable fire protection with efficient engineering support.
Company Profile
PRI-SAFETY FIRE TECHNOLOGY CO., LTD.
Why Choose Us?
Other Services
