Wet chemical fire extinguishers are usually supplied with a long lance which helps to safely deploy the foam. The wet chemical forms a thick soapy foam-like blanket over the surface of the burning oil/fat which stops oxygen from reaching the fire and smothers the flames.
What is wet chemical fire extinguisher made of?
The active ingredient in a wet chemical fire extinguisher is potassium acetate, often with added potassium citrate or potassium bicarbonate. When operated, a wet chemical extinguisher creates a fine mist, which cools the flames and prevents splashing.
What is a wet chemical?
Wet chemicals contain a specifically formulated extinguishant that reacts with oil to form a soapy substance through a process called saponification. When applied to burning liquids, the saponification process cools and emulsifies, extinguishing the flame and sealing the surface to prevent reignition.
What class is a wet chemical fire extinguisher?
Wet Chemical K-Class Fire Extinguishers are specifically designed to combat restaurant kitchen fires. These extinguishers are effective on Class K fires. They are used to supplement existing automatic cooking equipment and kitchen suppression systems.
When can a wet chemical extinguisher be used?
Wet chemical extinguishers are used for cooking oil fires, or more specifically deep fat fryer fires. This type of fire is different from other categories because water, foam, powder and even CO2 extinguishers will actually aggravate an oil fire rather than extinguish it.
How do wet chemicals extinguish a fire remove?
In extinguishing Class F fires, wet chemicals work by covering the flammable liquid using a blanket of foam. This foam blanket then forms a crust on top of the fat or cooking oil. As a result, the oxygen supply to the other elements of combustion is cut off. This hinders the process of combustion from continuing.
What are the 5 types of fire extinguishers?
There are five main types of fire extinguishers:
- Water, water mist or water spray.
- Carbon Dioxide.
- Wet Chemical.
- Dry Powder- standard or specialist.
What is dry chemical fire extinguisher?
Dry chemical extinguishers put out fire by coating the fuel with a thin layer of dust, separating the fuel from the oxygen in the air. The powder also works to interrupt the chemical reaction of fire, so these extinguishers are extremely effective at putting out fire.
What is wet chemical powder?
Wet Chemical (Potassium Based) Minimax Kitchen (F-Class) Type fire extinguishers are designed for use on Class F fires which involves cooking oils and fat. Wet chemical is the only type of extinguisher to be used on kitchen (F-Class) fires.
What are the 4 types of fire extinguishers?
There are four classes of fire extinguishers – A, B, C and D – and each class can put out a different type of fire.
- Class A extinguishers will put out fires in ordinary combustibles such as wood and paper.
- Class B extinguishers are for use on flammable liquids like grease, gasoline and oil.
What are the 7 types of fire extinguishers?
The eight different types of fire extinguishers include specialist dry powder, standard dry powder, foam, water spray, water mist, water spray, wet chemical and carbon dioxide. There is no single fire extinguisher that can be used on all classes of fire.
What is water extinguisher?
Water Fire Extinguishers are suitable for class A fires caused by the combustion of solid materials, mainly of organic origin, such as wood, paper, straw, textiles, coal etc. Not for use on electrical equipment or electrical fires. Category: Other Extinguishers Tags: class a, class a fire, fire extinguisher, h2o, water.