Introduction: Gentle, Splatter-Reducing Agent Delivery
The Wet Chemical Application Wand Nozzle is the specialized discharge assembly mandatory for Class K fire extinguishers. Its unique design is engineered to deliver the Potassium Acetate agent gently and evenly as a fine, dispersed mist rather than a solid stream. This gentle application is critical because commercial cooking oils burn at extremely high temperatures (≈700∘F).
If a traditional solid stream were used, the water content in the wet chemical agent would instantly vaporize, leading to a violent reaction that could cause the burning hot oil to splatter and spread the fire, potentially injuring the operator. The nozzle is attached to a long, flexible wand or hose, allowing the user to apply the mist safely from a distance, maximizing the saponification and cooling effects without agitation.
The wand itself is typically chrome-plated brass or stainless steel for corrosion resistance against the alkaline wet chemical agent.
Advantage: Safety, Splatter Prevention, and Effective Saponification
- User Safety: The long wand maintains a safe distance, and the mist pattern eliminates the risk of hot oil splashback.
- Optimal Agent Delivery: The mist covers the oil surface rapidly, maximizing the chemical reaction (saponification) that forms the flame-smothering soap layer.
- Corrosion Resistance: Chrome-plated or stainless steel construction protects the assembly from the alkaline wet chemical agent and the greasy kitchen environment.
- Accurate Targeting: The flexibility of the wand allows precise placement of the mist over the fire, even in deep fryer wells.
- Minimal Damage: The light mist prevents damage to surrounding kitchen equipment or structures compared to a forceful dry chemical discharge.
- Code Compliance: The specialized design is mandated by fire codes (NFPA 10) for Class K hazards.
Specification: Discharge Pattern, Material, and Length
| Component Function | Creates a Fine, Non-Splattering Mist of Wet Chemical Agent |
| Discharge Pattern | Fine Spray or Gentle Mist (Avoids Oil Splatter) |
| Agent Compatibility | Potassium Acetate/Carbonate (Class K Wet Chemical) |
| Wand Material | Chrome-Plated Brass or Stainless Steel (Corrosion Resistant) |
| Wand Length | Typically 1.5 to 3 feet (Allows Safe Stand-Off Distance) |
| Standard Compliance | UL 711 (Mist Pattern and Flow Rate), NFPA 10 |
| Key Safety Feature | Prevents Violent Steam Eruption and Burning Oil Splatter |
| Nozzle Feature | Internal Mesh or Filter to Ensure Fine Particle Size |
Critical Use in Commercial Cooking
Deep Fat Fryers
Mandatory for suppressing fires in commercial fryers without causing the super-heated oil to violently splatter or explode.
Commercial Grills and Woks
Used to apply the cooling and saponifying agent gently onto burning grease build-up.
Food Service Safety
Ensures the unit is operable by kitchen staff, allowing safe application from a comfortable distance.
Hood Suppression Backup
The portable unit serves as a critical manual backup if the automatic kitchen hood system fails to fully extinguish the fire.
Marine Galleys
Used on ships and cruise lines where kitchen fires pose a severe threat in confined spaces.
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