Why Spray Nozzles Play A Critical Role In Fire Suppression

June 5, 2023
Chemical tank fire protection test of two spiral fire protection nozzles mounted on water pipes spraying a deluge of water onto a small chemical tank surrounded by flames

Spray nozzles play a crucial role in fire suppression systems by delivering the extinguishing agent, such as water or foam, effectively and controlled. Here are some key points highlighting the importance of using spray nozzles for fire suppression:

Efficient Fire Extinguishment: Spray nozzles are designed to disperse the extinguishing agent into fine droplets or a spray pattern, maximizing the surface area coverage of the fire. These droplets enhance the agent’s ability to absorb heat and suppress the flames quickly and efficiently.

Control and Direction of Extinguishing Agent: Spray nozzles allow for precise control and direction of the extinguishing agent, ensuring that it is targeted at the source of the fire. This helps optimize the agent’s use and minimize potential collateral damage.

Improved Safety: Firefighting personnel can maintain a safe distance from the fire using spray nozzles while effectively delivering the extinguishing agent. Nozzles reduce exposure to heat, smoke, and other hazardous conditions, enhancing safety during fire suppression operations.

Tailored Application: Spray nozzles come in various types and designs to meet specific fire suppression requirements. Different types of fires may require different spray patterns, flow rates, or droplet sizes. By selecting the appropriate nozzle, it is possible to customize the application for optimal fire suppression performance.

Compatibility with Fire Codes and Standards: Spray nozzles are developed and tested according to industry standards and fire codes. They must meet specific performance criteria to ensure reliability and effectiveness in fire suppression scenarios. Using approved and certified spray nozzles helps ensure compliance with relevant regulations. BETE fire protection nozzles are tested, evaluated, and approved by Factory Mutual (FM), Underwriters Laboratories (UL), and the U.S. Coast Guard.

Overall, spray nozzles are vital to fire suppression systems, providing efficient and controlled delivery of extinguishing agents. They contribute to the rapid and effective suppression of fires, safeguarding lives, property, and the environment.

Spray Nozzles For Fire Suppression

Several types of spray nozzles are used for fire suppression, each designed to meet specific firefighting needs. Here are some commonly used nozzle types:

Fog and Misting Nozzles: Fog and misting nozzles create a fine mist or fog by dispersing water or firefighting foam into tiny droplets. The fog pattern helps to cool the fire, displace oxygen, and suppress the flames by providing maximum surface area coverage. BETE’s patented MicroWhirl® misting nozzle provides outstanding atomization with the drip-free operation and is widely used in water mist protection systems.

Many companies use misting nozzles to replace existing halon systems, which can harm the environment. The low volume flow and high evaporation rate minimize water damage to sensitive equipment.

Spiral Nozzles: Full cone spiral nozzles are exceptionally reliable in outdoor fire protection systems because of their fine droplet size and large free passage. These nozzles produce multiple concentric cones, which form two to three bands of finer droplets. The tiny droplets are ideal for cooling, while the larger droplets are ideal for wind resistance.

BETE’s N series is the only spiral nozzle design approved by both FM & UL agencies for fire protection and is commonly used in open-type deluge systems. These systems typically maintain dry supply piping, and when heat, smoke, or flames are detected, a deluge valve opens and supplies water and pressure to the nozzle for operation.

Fan and Deflected Fan Nozzles: Fan nozzles are used in water wall fire protection systems because they provide an adequate barrier to shield personnel and equipment against radiant heat, harmful gases, and flames. These nozzles are designed for effective spray impact, and deflected fan nozzles produce an extra-wide spray pattern allowing more water to spray and form a suppression wall.

Foam Nozzles: Deflected fan and spiral nozzles can be used for spraying firefighting foam. They generate foam by introducing air into the foam solution, producing an expanded and cohesive blanket that suppresses flammable liquid fires. These nozzles are used when a fire involves flammable liquids, such as in industrial facilities, fuel storage areas, or ship decks.


In all these applications, spray nozzles are critical in optimizing the delivery of extinguishing agents, ensuring efficient fire suppression, and protecting lives and property. BETE offers a wide variety of high-performance nozzles that are proven to work in the most demanding and mission-critical environments. Our nozzles are tested, evaluated, and approved by rigorous third-party certifiers, including Factory Mutual (FM) and Underwriters Laboratories (UL), to ensure reliable operation.

It’s important to note that different fire suppression systems and organizations may have specific nozzle requirements based on their unique needs and regulations. Therefore, it is advisable to consult with fire safety professionals and adhere to relevant standards when selecting and installing spray nozzles for fire suppression applications.

Contact us to learn more about how you can optimize your spray process and save resources with BETE spray technology.

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