Nfpa750 Water Mist Fire Suppression System

• Customization: Available
• Agent: Water Mist
• Type: Pump Pressurised
• Model NO.: WM/PRI-112/14
• Object: Class a/B/C
• Size: 1 Work 1 Reserve~7work 1 Reserve
• Certification: Nfpa750 Standard
• Portable Extinguisher: Pump Pressurised
• Effective Range: Total Flooding
• Retirement Life: 8 Years
• Dry Powder Type: Water Mist Agent
• Power Source: Pump Pressurised
• Model: High Pressure Model
• Motor Color: Red/Blue/or Customized Color
• Water Mist Pump Model: Danfos S or Normal Pump
• Working Pressure: 14~16MPa
• Nozzle Model: Open Type/Closed Type
• Application: Computer Rooms/Data Centers/Archives/Libraries/Gen
• Site Drawing: Support Design and Detailed System Drawing
• OEM: Support
• Software Computing: Support
• Transport Package: Palletized
• Specification: 1 Work 1 Reserve~7Work 1 Reserve
• Trademark: PRI-SAFETY
• Origin: China
• HS Code: 842410
• Production Capacity: 100sets/Month

Product Description

NFPA750 Water Mist Fire Suppression System

Product Description:

A pump-pressurized high-pressure water mist fire system is an advanced fire suppression technology designed to extinguish fires efficiently using fine water droplets generated under high pressure.

The small water droplets allow the water mist to control, suppress or extinguish fires by:
1. Cooling both the flame and surrounding gases by evaporation---Absorb Heat&Cooling

2. Displacing oxygen by evaporation---Isolate Oxygen

3. Attenuating radiant heat by the small droplets themselves---Isolate Heat

How it works?

* 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. 

Here's a step-by-step breakdown of how it operates:

1. Activation & Detection * Fire Detection: Sensors (smoke, heat, or flame detectors) identify a fire and trigger the system. * Control Panel Activation: The control unit activates the high-pressure pump and opens valves to direct water flow to the affected zone. 2. High-Pressure Water Generation * Pump Pressurization: A dedicated high-pressure pump (typically 70-200 bar or 1,000-3,000 psi) pressurizes water from a storage tank or mains supply. * Stable Pressure Maintenance: The pump ensures consistent pressure even as water is discharged, critical for effective mist generation. 3. Atomization at Nozzles * Nozzle Design: Specialized nozzles use high-pressure water flow to shear the water into micron-sized droplets (10-200 microns in diameter). * Mist Formation: The tiny droplets create a dense fog-like mist, vastly increasing the water's surface area compared to traditional sprinklers.

4. Fire Suppression Mechanisms The fine mist achieves fire suppression through three key physical mechanisms: a) Rapid Cooling (Heat Absorption) * Evaporation: The large surface area of the droplets allows instant evaporation, absorbing heat energy from the fire. * This cools the flames and surrounding gases below the fire's ignition temperature. b) Oxygen Displacement * Steam Expansion: Evaporated water turns to steam, expanding up to 1,700 times in volume. * This dilutes oxygen levels in the fire zone.. c) Radiant Heat Blocking * Mist Curtain: The dense mist scatters and absorbs radiant heat, shielding unburned fuel and adjacent areas from ignition. 5. Post-Suppression Benefits * Minimal Water Damage: Limited water volume (often < 1 liter/min per nozzle) reduces collateral damage to assets. * Re-ignition Prevention: The cooling effect and residual mist inhibit re-flash of flammable materials.

Technical Parameters

Specifications for Single High Pressure Water Mist Pump, 112L/min, 14Mpa, 30kw
 

Code No.	Working Pressure	Flow(L/Min)	Pump Speed(r/Min)	Dimensions(mm)	Note
WM/PRI-112/14	14Mpa	112	1470	2000x1200x2000	1 Work 1 Reserve
WM/PRI-224/14	14Mpa	224	1470	2650x1200x2000	2 Work 1 Reserve
WM/PRI-336/14	14Mpa	336	1470	2650x1200x2000	3 Work 1 Reserve
WM/PRI-448/14	14Mpa	448	1470	3100x1200x2000	4 Work 1 Reserve
WM/PRI-560/14	14Mpa	560	1470	3100x1200x2000	5 Work 1 Reserve
WM/PRI-672/14	14Mpa	672	1470	3550x1200x2000	6 Work 1 Reserve
WM/PRI-784/14	14Mpa	784	1470	3550x1200x2000	7 Work 1 Reserve

Specifications for Single High Pressure Water Mist Pump, 134L/min, 16Mpa, 45kw

Code No.	Working Pressure	Flow(L/Min)	Pump Speed(r/Min)	Dimensions(mm)	Note
WM/PRI-134/16	16Mpa	134	1470	2000x1200x2000	1 Work 1 Reserve
WM/PRI-268/16	16Mpa	268	1470	2650x1200x2000	2 Work 1 Reserve
WM/PRI-402/16	16Mpa	402	1470	2650x1200x2000	3 Work 1 Reserve
WM/PRI-536/16	16Mpa	536	1470	3100x1200x2000	4 Work 1 Reserve
WM/PRI-670/16	16Mpa	670	1470	3100x1200x2000	5 Work 1 Reserve
WM/PRI-804/16	16Mpa	804	1470	3550x1200x2000	6 Work 1 Reserve
WM/PRI-938/16	16Mpa	938	1470	3550x1200x2000	7 Work 1 Reserve

Specifications for Single High Pressure Water Mist Pump, 168/min, 13Mpa, 45kw

Code No.	Working Pressure	Flow(L/Min)	Pump Speed(r/Min)	Dimensions(mm)	Note
WM/PRI-168/16	13Mpa	168	1470	2000x1200x2000	1 Work 1 Reserve
WM/PRI-336/16	13Mpa	336	1470	2650x1200x2000	2 Work 1 Reserve
WM/PRI-504/16	13Mpa	504	1470	2650x1200x2000	3 Work 1 Reserve
WM/PRI-672/16	13Mpa	672	1470	3100x1200x2000	4 Work 1 Reserve
WM/PRI-840/16	13Mpa	840	1470	3100x1200x2000	5 Work 1 Reserve
WM/PRI-1008/16	13Mpa	1008	1470	3550x1200x2000	6 Work 1 Reserve
WM/PRI-1176/16	13Mpa	1176	1470	3550x1200x2000	7 Work 1 Reserve

Technical Parameters for Water Mist Nozzles:

Closed high pressure water mist 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

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

 

Open high pressure water mist nozzle: 




The open water mist nozzle is made of austenitic stainless steel 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.

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

 

System Components:

Key Components

1. High-Pressure Pump: Generates pressure typically between 70-200 bar (1,000-3,000 psi), crucial for atomizing water into a fine mist.

2. Specialized Nozzles: Disperse water into microscopic droplets (10-200 microns), enhancing surface area for rapid heat absorption.

3. Piping Network: Stainless steel or durable materials to withstand high pressure.

4. Water Supply: Tanks or connected sources, often requiring minimal water volume compared to traditional systems.
 

5. Control System: Integrates with fire detectors (heat/smoke) for automatic activation.* Components: * Fire Detectors: Heat, smoke, or flame sensors for early detection. * Control Panel: Activates pumps, valves, and alarms based on sensor input. * Zone Valves: Solenoid valves to direct water to specific areas. * Integration: Often interfaces with building management systems (BMS) for centralized monitoring.

 

Packing & Delivery

To ensure the high-pressure water mist fire system arrives safely during exportation, packaging must address durability, we package the water mist system as followings steps:

a) High-Pressure Pump Unit Crate Design:
Use reinforced wooden crates with internal steel framing. Shock Absorption: Line with closed-cell foam or bubble wrap to dampen vibrations. Moisture Protection: Seal with desiccant packs and waterproof plastic sheeting.

b) Nozzles & Valves Individual Compartments:
Pack in rigid plastic cases with foam inserts. Sealing: Use anti-static bags for electronic solenoid valves.

c) Piping & Tubing Bundle Securely:
Wrap stainless steel pipes in corrosion-resistant film and bundle with nylon straps. End Caps: Protect threaded ends with plastic caps to prevent dirt/debris ingress. Crating: Use slotted-angle racks for long pipes to avoid bending.

d) Control Panels & Electronics Reinforced Corners:
Add edge protectors to prevent impact damage.

e) Filters & Sensors Rigid Boxes:
Use crush-proof containers with dividers.To ensure the high-pressure water mist fire system arrives safely during exportation, packaging must address durability, we package the water mist system as followings steps:

Product Applications:

1. Commercial Settings Data Centers: Protects sensitive electronics with minimal water damage. Hospitals: Ensures fire suppression without disrupting medical equipment or patient safety. Museums/Libraries: Safeguards artifacts and books by minimizing water exposure. Shopping Malls/Office Buildings: Efficiently controls fires while reducing collateral damage.

2. Industrial Environments Oil & Gas Facilities: Suppresses flammable liquid/gas fires without spreading hazards. Power Plants: Protects turbines and generators; effective in controlling high-heat fires. Manufacturing Plants: Ideal for machinery spaces with overheating risks. Pharmaceutical Clean Rooms: Prevents contamination while suppressing fires.

3. Transportation Marine Vessels: Uses seawater in confined spaces (engine rooms, cargo holds). Aircraft Hangars: Safeguards expensive equipment and complies with aviation safety standards. Tunnels: Functions effectively in ventilated or underground environments. Rail/Public Transit: Deployed in stations or trains for rapid response.

 

Project installation example

Company Profile:

PRI-SAFETY produce high quality fire fighting products, and we supply one-stop purchasing service too.

PRI-SAFETY FIRE TECHNOLOGY is Establised in 2005, is Focused on Automatic Fire Suppression Systems and Fire Equipment R&D, Design and Manufacture. The Main Products are On/Off Road Vehicles & Machines Automatic Fire Suppression system, HFC-227ea & FK-5112 Clean gas Fire Suppression systems, CAFS( Mobile Compressed Air Foam System), Water Mist Fire System, Foam Mist Fire System, Co2 Fire System, etc.

The Products and Fire Systems are used in Mining Industry, Forest Industry, Agriculture, Petrochemical, Transportation, Electricity Power, Industry,Construction and other fields.

PRI-SAFETY Has Professional Technology Team , Have Ability Supply Design, Solution, and Customization, For Special Project Requirement, and Technology Training&Instruction After Sales. PRI-SAFETY Has the Certificates, ISO9001:2015, TUV CE0036, ECE R107, CCC, and So On. The Products Meet the International Standard of EN, NFPA, CNAS,ECE, etc.