The water mist fire extinguishers have become extremely popular these days. They are a modern method of putting out fires using fine water droplets. This helps cool down the fire and cut off the oxygen. In doing so, it helps in stopping the flames safely and instantly. In places where sensitive equipment and electrical dangers are common, having this sort of extinguisher is advantageous.
What are water mist fire extinguishers?
The water mist extinguisher consists of de-ionised water, which doesn’t have minerals and it's non-toxic and non-conductive. When it’s released, the water passes through a high-pressure rotor or a nozzle and then transforms into a fine spray. The droplets are roughly between 40 and 200 micrometres. This helps create a smothering and cooling mist that aids in calming the fire immediately.
What are water mist fire extinguishers used for?
The water mist systems are secure and versatile for various types of fires. In general, they are used for Class A (combustibles), Class K/F (for fat or cooking oil fires) and even Class E/C (electrical fires).
These extinguishers are ideal for locations such as historic buildings, hospitals, server rooms, offices and kitchens. Since these extinguishers don’t leave behind any residue and avoid water-based damage, they are suitable in areas that have valuable contents or sensitive equipment.
How water mist fire extinguishers work
The water mist-type fire extinguisher functions in the following ways:
- Cooling: The fine droplets from this extinguisher evaporate instantly, absorbing the extreme heat and lowering the temperature around the fire.
- Oxygen displacement: The mist releases the water vapour, which lowers the oxygen levels around the flames. In return, it suffocates the fire.
- Blanket effect: The fine mist then creates a protective layer over the fire, reducing smoke and stopping reignition.
Advantages of water mist fire extinguishers
Using the water mist fire systems can provide you with the following benefits:
- Safe for electrical fires
These extinguishers can be used easily on electrical fires. The fine mist does not conduct electricity, making it safe for data centres, hospitals and offices where electrical fire risks are common.
- Contains no harmful chemicals
These extinguishers use only water, which makes them safe and non-toxic for the environment, animals and humans. They also have no harmful chemicals or residues that can cause health issues later on, making them perfect for hospitals and food-related settings. The water mist extinguisher can also be used in any work setting and in schools.
- Lowers toxins and smoke
In certain cases, fire suppression can lead to situations where a significant amount of smoke is released, affecting the day-to-day lives of people. This can cause massive respiratory issues, and toxins are also produced. Having a water mist extinguisher can help resolve this issue, as it can lower the production of harmful gases and smoke, while also cooling the fire.
- Minimal cleanup needed
Using traditional extinguishers can make it difficult to clean up after using them. However, that’s not the case with the water mist ones. It includes minimal cleanup. This extinguisher leaves little or no residue, making the post-fire clean-up easy and quick.
Disadvantages of water mist fire extinguishers
Apart from having so many benefits, the mist fire extinguisher also has some drawbacks, such as:
- Not meant for all fires: These extinguishers might become less effective against Class D (metal) and fires caused by very hot cooking oils.
- The cost: These units are more costly compared to the standard fire extinguishers.
- Requires special training: Users have to understand this new technology to handle it safely.
- Cold climate problems: The water might freeze if it's used during lower temperatures. This will completely disable the extinguisher.
Maintenance and inspection
The water spray extinguisher will require periodic inspections and maintenance to ensure optimal performance. This means the extinguisher’s pressure, nozzle condition and seals need to be checked. Furthermore, you must also verify the service or expiry dates. When it comes to recharging and servicing, always follow the manufacturer's instructions.
Regulations and standards
The water mist fire systems have been recognised as an efficient and sustainable option under fire safety codes worldwide. The Indian standard IS:15519 outlines the performance and design criteria, which include momentum, the spray density and droplet size required to suppress the fires perfectly.
Enterprises and institutions that use the water mist extinguishers should check whether their systems conform to these standards.
Conclusion
The water mist extinguishers provide efficient and clean fire control with minimal residue and reduced water damage, making them ideal for all sensitive settings. But fire preparedness also includes having a financial backup in case things go wrong. Property insurance, especially fire insurance, covers damages caused by fire-related risks. It helps you in repairing or rebuilding the physical structure of your property and replacing personal belongings, electronics and furniture, according to the policy’s terms.
FAQs
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Why pick water mist over a standard water extinguisher?
The water mist provides fine droplets, leaves behind little residue and uses less water. It’s high in demand where precious items and sensitive equipment are present.
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Can water mist extinguishers be used in kitchens with hot oil?
The standard water mist extinguishers are not always ideal for deep-fat fryer fires. Special-purpose or wet-chemical mist systems are necessary for mitigating numerous kitchen hazards.
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Do insurers recognise water mist extinguishers for fire insurance policies?
If certified systems are correctly installed, insurance firms might acknowledge them in fire or property insurance assessments.
Disclaimer: The information provided in this blog is for educational and informational purposes only. It is advised to verify the currency and relevance of the data and information before taking any major steps. Please read the sales brochure / policy wordings carefully for detailed information about on risk factors, terms, conditions and exclusions. ICICI Lombard is not liable for any inaccuracies or consequences resulting from the use of this outdated information.