Open -Type Intermediate-Pressure Water Mist Fire Suppression System (Horizontal Pump Unit)

1. What is water mist fire suppression system?

A water mist fire extinguishing system uses water as the primary extinguishing medium and employs water mist nozzles that discharge fine water droplets under pressure to achieve fire extinguishment or fire control. It is an environmentally friendly system with high extinguishing efficiency and a wide range of applications.

According to the type of water mist nozzles used, water mist systems can be classified into open water mist systems and automatic (closed) water mist systems.

The open-type water mist fire suppression system utilizes open-type water mist nozzles. When a fire occurs, the zone control valve opens, allowing pressurized water to flow through the valve and pipeline network, and then be released in the form of fine water mist via the water mist nozzles.

2. Key Advantages

Personnel Safety and Egress-Friendly Performance

• No harmful by-products are generated during discharge; the system rapidly reduces temperature and decreases smoke concentration, improving visibility and creating favorable conditions for safe occupant egress.

• The fine water mist droplets are gentle and avoid the secondary injuries that may result from Intermediate-Pressure water streams.

Environmental Friendliness and Sustainability

• Uses only water as the extinguishing medium, with no chemical additives and no adverse environmental impact.

• Extremely low water consumption significantly reduces water usage, supporting green building principles and sustainable development objectives.

Minimal Water Damage

• Consumes far less water than conventional systems, thereby minimizing water-related damage to equipment, archives, and building structures.

• Well suited for water-sensitive environments such as data centers, libraries, and cultural heritage protection areas.

High Extinguishing Efficiency and Rapid Fire Control

• Fine water mist provides strong cooling (heat absorption) and oxygen displacement effects, enabling rapid extinguishment of Class A, Class B, and energized electrical fires.

• Fast response effectively suppresses fire spread, reduces heat release rate, and limits smoke and particulate generation.

System Flexibility and Broad Applicability

• Can be engineered for Local Application or Total Flooding protection, accommodating diverse layouts and fire-risk profiles.

• Small-diameter  piping conserves space and simplifies installation in existing buildings or complex structures.

• System can be designed in modular configurations, enabling convenient expansion and maintenance.

3. How It Works

An open-type intermediate-pressure water mist system pressurizes a conventional water supply using a intermediate-pressure pump unit, and atomizes the water into ultra-fine droplets through specially designed open water mist nozzles.
When the fire detection system generates an alarm signal, the system is automatically activated and the nozzles discharge water mist throughout the protected area, achieving multiple extinguishing mechanisms:

1. High-Efficiency Cooling:
   The extremely large surface area of the fine water mist droplets enables rapid heat absorption, causing a sharp reduction in flame temperature.

2. Oxygen Displacement (Inerting Effect):
   As the water mist evaporates and expands, it locally reduces the oxygen concentration, thereby inhibiting the combustion reaction.

3. Radiant Heat Attenuation:
   The water mist cloud forms an effective barrier that attenuates radiant heat, preventing fire spread.

4. Smoke Scrubbing:
   Fine droplets agglomerate with smoke particles, reducing smoke density and improving visibility for occupant egress.

4. System Components

5. Main Technical Parameters

6.Typical Applications

Open-type Intermediate-Pressure water mist systems have been successfully deployed worldwide in a wide range of critical facilities:

• Data Centers and Telecommunication Rooms:
  Protection of servers and network infrastructure; electrically nonconductive and minimal water-related risk.

• Cultural Heritage and Museums:
  Protection of collections, archives, and artwork while avoiding damage from excessive water or chemical agents.

• Electrical Power Facilities:
  Including substations, turbine halls, cable tunnels, and associated equipment rooms.

• Marine and Offshore Platforms:
  Engine rooms, pump rooms, control rooms, and other confined or high-risk spaces.

• Rail Transit Systems:
  Metro railcars, platform equipment areas, traction substations, and related technical rooms.

• Industrial Facilities:
  Hydraulic power units, oil-immersed transformers, flammable liquid storage, and various manufacturing processes.

• Commercial and Public Buildings:
  Atriums, libraries, warehouses, commercial spaces, and kitchen exhaust ducts.

In summary, any environment that requires high-efficiency fire suppression, minimal water damage, enhanced personnel safety, and environmentally sustainable protection is an ideal application for an open-type Intermediate-Pressure water mist system.

Call to Action:

Are You Looking for an Advanced Fire Protection Solution That Meets the Following Needs?

• Ultimate protection against water damage
• Personnel-safe and evacuation-friendly performance
• Green, environmentally sustainable suppression
• Adaptability to complex spaces and high-risk environments
• Compliance with international standards and ease of maintenance

An open-type Intermediate-Pressure water mist fire suppression system provides a high-efficiency, clean, safe, flexible, and sustainable next-generation fire protection solution.

We invite you to contact our international engineering team for professional technical consultation, customized system design, and globally competitive quotations tailored to your specific project requirements.