Pyro-Chem 2L Nozzle, Single Item - 551027
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Wholesale PricingThe Pyro-Chem 2L Nozzle (Part No. 551027) is a precision-calibrated discharge component engineered for low-proximity fryer protection within the Kitchen Knight II system. In environments where structural beams, HVAC ducting, or limited ceiling heights prevent traditional high-proximity mounting, the 2L nozzle provides a specialized solution. It is specifically calibrated to operate at a mounting height of 13 to 24 inches above the cooking surface, delivering a concentrated spray of agent directly into the hazard zone.
Designated as a 2-flow nozzle, the 551027 discharges double the volume of a standard nozzle, ensuring the necessary chemical concentration is achieved in a smaller footprint. It utilizes aerosolized saponification to transform the liquid agent into a non-combustible soap foam, which excludes oxygen and prevents the re-ignition of fats. By providing a massive endothermic cooling effect, this nozzle brings oil temperatures below the auto-ignition point in seconds. For contractors, the 551027 low-proximity nozzle is the definitive choice for mobile kitchen units and food trucks where compact culinary spaces require a high-volume, low-clearance fire defense.
| Feature | Details |
|---|---|
| Manufacturer | Pyro-Chem (A Johnson Controls Brand) |
| Part Number | 551027 (Model 2L) |
| Flow Point Rating | 2-Flow Points |
| Mounting Height | 13 to 24 inches (33 to 61 cm) |
| System Compatibility | Kitchen Knight II (Wet Chemical) |
| Material | Machined Chrome-Plated Brass |
| Included Hardware | Metal Blow-Off Cap |
| Compliance | UL 300, ULC Listed, NFPA 17A |
The 551027 must be installed by a licensed fire suppression technician in strict accordance with the Kitchen Knight II design manual and the system's as-built drawings. The nozzle must be mounted at a height between 13 and 24 inches above the cooking surface. Mounting outside this range is a code violation; at heights above 24 inches the spray pattern becomes too dispersed to achieve the necessary chemical concentration for suppression, and a high-proximity nozzle from the 2F series must be used instead.
Because the 551027 sits much closer to the cooking surface than standard nozzles, it is subjected to intense grease rain during normal kitchen operation. The included metal blow-off cap must be installed at all times to prevent the internal orifice from caking with solidified grease. During each semi-annual inspection, technicians must verify the cap is present and moves freely, and that the orifice is fully unobstructed. Any nozzle showing signs of corrosion, grease caking, or orifice restriction must be replaced with a new OEM 551027 to maintain the system's UL 300 listing.
Can I use the 551027 at a mounting height of 36 inches?
No. The 551027 is a low-proximity nozzle listed exclusively for heights between 13 and 24 inches. At 36 inches, the spray pattern will be too dispersed to achieve the necessary chemical concentration for suppression. For heights above 24 inches, a high-proximity nozzle such as the 2F series must be used.
Why is the metal blow-off cap critical for low-proximity nozzles?
Because this nozzle sits much closer to the cooking surface (as low as 13 inches), it is subjected to intense grease rain. The metal blow-off cap prevents the internal orifice from caking with solidified grease, ensuring an unobstructed flow path the moment the system fires.
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