Wet Chemical (Class K - Kitchen) Portable Fire Extinguisher

Wet Chemical Class K Portable Fire Extinguisher — Commercial Kitchen Protection

The Strike First SF-6LK is a 6-liter wet chemical portable fire extinguisher engineered specifically for restaurant and commercial kitchen environments. Rated 1-A: K and UL/ULC Listed, it is designed to combat fires involving combustible cooking oils (vegetable) and animal fats, as well as Class A materials such as wood, paper, and cloth. The low pH wet chemical agent effectively smothers and cools kitchen fires, and the unit is intended to serve as a backup to an automatic fire suppression system. Built with a polished stainless-steel cylinder and chrome-plated solid brass valve, this extinguisher is factory filled and pressurized, ready for immediate deployment.

Technical Specifications

The SF-6LK distinguishes itself from dry chemical alternatives through its low pH wet chemical agent, which not only suppresses flames but also cools the fuel source to prevent re-ignition — a critical advantage in high-heat commercial cooking environments. Its 73-second discharge time and 8–10 ft range give operators meaningful standoff distance and sustained agent delivery compared to shorter-duration units. The all-stainless steel construction and waterproof gauge are built to withstand the demanding conditions of a commercial kitchen.

Key Features & Benefits

Polished Stainless-Steel Cylinder with Protective Skirt

The stainless-steel cylinder resists corrosion in the high-humidity, grease-laden atmosphere of a commercial kitchen. The protective skirt guards the base against impact damage during storage and handling, extending service life.

Chrome-Plated Solid Brass Valve

A solid brass valve with chrome plating provides reliable, corrosion-resistant operation when it matters most. This construction ensures the valve actuates smoothly even after extended periods of standby service.

Waterproof Stainless-Steel Gauge

The waterproof gauge allows technicians and kitchen staff to verify pressure status at a glance without risk of moisture ingress compromising the reading. Accurate pressure monitoring is essential for confirming the unit is ready for use during routine inspections.

Oversized Stainless Steel Pull Pin with Retaining Strap

The oversized pull pin is designed for faster, more reliable activation under stress — critical when seconds count in a kitchen fire scenario. The retaining strap prevents accidental discharge while keeping the pin accessible.

Stainless Steel Handles and Siphon Tube

All-stainless internal and external hardware resists the corrosive effects of the wet chemical agent and kitchen environment. This ensures consistent agent delivery throughout the full 73-second discharge cycle.

Color and Bar-Coded Labels

Color and bar-coded labels streamline accurate service and inspection recordkeeping for fire safety professionals. This simplifies compliance documentation and reduces the risk of service errors during annual inspections.

Factory Filled and Pressurized

The SF-6LK ships ready for immediate installation and use, eliminating the need for on-site charging. This reduces setup time and ensures the unit is at the correct operating pressure of 100 PSI from day one.

Common Applications

Commercial Restaurant Kitchens

Designed specifically for restaurant kitchen hazards, the SF-6LK provides backup suppression capability alongside automatic hood suppression systems on commercial cooking lines.

Combustible Cooking Oil Fires

The low pH wet chemical agent smothers and cools fires fueled by vegetable cooking oils, which burn at extremely high temperatures and are prone to re-ignition if not properly cooled.

Animal Fat Fires

Effective against fires involving animal fats used in deep fryers and other commercial cooking appliances, where conventional extinguishing agents may be insufficient.

Class A Material Fires in Kitchen Environments

The 1-A rating allows the SF-6LK to address incidental fires involving wood, paper, and cloth materials that may be present in or adjacent to kitchen areas.

Compatible Materials

• Combustible vegetable cooking oils
• Animal fats
• Wood
• Paper
• Cloth

Product Documents

• Strike First Wet Chemical Product Sheet (EN, Feb 2024)

Frequently Asked Questions

Q: Is the SF-6LK intended to replace an automatic kitchen fire suppression system?
A: No. According to the manufacturer, the SF-6LK is intended to be used as a backup for an automatic fire suppression system, not as a standalone replacement.

Q: What fire classes does the SF-6LK cover?
A: The SF-6LK is rated for Class K (commercial cooking fires involving combustible cooking oils and animal fats) and Class A (wood, paper, and cloth), with a UL/ULC rating of 1-A:K.

Q: What standards does the SF-6LK comply with?
A: The unit meets or exceeds ANSI/UL 8, ANSI/UL 711, CAN/ULC-S554, CAN/ULC-S508, NFPA 10 Standard, and D.O.T. Requirements.

Q: What is the operating temperature range?
A: The SF-6LK is rated for use in temperatures from 2°C to 49°C (35°F to 120°F).

Q: How long does the SF-6LK discharge?
A: The unit has a discharge time of 73 seconds at 100 PSI, providing sustained agent delivery over a range of 8–10 ft (2.4–3 m).

Q: What mounting hardware is included?
A: The SF-6LK comes with a standard wall bracket for fixed installation in a kitchen or restaurant environment.