Products

Wet chemical (K-class) fire extinguishers are specifically designed to tackle fires involving cooking oils and fats, making them essential in kitchens and food preparation areas. Here’s an overview of their key features:

Composition

• Wet Chemical Agent: These extinguishers typically contain a solution of potassium acetate, sometimes combined with other agents, which is effective in cooling and suppressing grease fires.

Fire Classes

• Class K: Specifically designed for cooking oil and fat fires, common in commercial kitchens.
• Class A: They can also be effective on ordinary combustibles like wood and paper.

Mechanism of Action

• Cooling Effect: The wet chemical agent cools the burning material, helping to reduce the temperature.
• Saponification: The chemical reacts with the cooking oil, creating a thick, soapy foam that smothers the fire and prevents re-ignition.

Advantages

• Effective for High-Temperature Fires: They are specifically designed to handle high-temperature cooking oil fires that regular extinguishers may not effectively control.
• Minimal Splashing: The design helps reduce the risk of splashing burning oil, which can spread the fire.
• Prevention of Re-Ignition: The foam layer helps seal the surface of the oil, preventing oxygen from reaching it.

Considerations

• Limited Use: While effective for Class K and Class A fires, they are not suitable for Class B (flammable liquids) or Class C (electrical) fires.
• Regular Maintenance: Like all extinguishers, they require regular checks to ensure functionality.

Maintenance

• Inspection: Regular inspections should check the pressure gauge and ensure there is no visible damage.
• Annual Servicing: Follow local regulations for maintenance and servicing to ensure the extinguisher remains effective.

Usage

To use a wet chemical extinguisher, follow the PASS method:

• Pull the pin.
• Aim at the base of the fire.
• Squeeze the handle.
• Sweep in a circular motion to apply the foam effectively.

Summary

Wet chemical (K-class) fire extinguishers are essential in environments where cooking oils are present. They provide effective protection against grease fires, offering a specialized solution to a common hazard in kitchens and food service areas. Regular maintenance and proper usage training are critical to ensuring safety and effectiveness.