Pyro-Chem 1L Nozzle, 10 Pack - 551026

The Pyro-Chem 1L Nozzle (Part No. 551026) is a specialized low-proximity discharge component designed for the Kitchen Knight II fire suppression system. While other nozzles in the series focus on high-velocity appliance penetration, the 1L model is engineered for the delicate balance of plenum and duct protection. It delivers a precisely atomized one-flow-point (1.0 FP) spray pattern optimized for low-hanging hazard zones where a standard high-proximity nozzle might cause excessive agent splash.

This 10-pack bulk set is the logistical standard for fire protection service companies managing multiple hood systems. Each nozzle is machined from a high-grade corrosion-resistant alloy, capable of withstanding the constant thermal cycling of a 24/7 commercial kitchen. By utilizing a 1.0 FP rating, technicians can maximize the protective footprint of a single PCL agent tank without over-extending the system's hydraulic limits. These nozzles serve as the primary safeguard against fires migrating into the exhaust ventilation of high-volume cooking lines.

Each 551026 nozzle 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. Nozzle placement must conform to the specific Nozzle Aiming Point (NAP) and maximum mounting height for low-proximity plenum and duct applications as defined in the KKII manual. Because the 1L orifice is calibrated for a wider, softer spray pattern, substituting it for an H-style nozzle in an appliance application is not permissible and will void the system's UL 300 listing.

The factory-authorized blow-off cap must be installed on every nozzle to protect the orifice from grease loading between service intervals. During each semi-annual inspection, technicians should check all nozzles in the pack for baked-on grease, damaged threads, or orifice restriction. Because grease accumulation is a leading cause of nozzle failure in plenum applications, the 10-pack format allows for the complete replacement of an entire hood's nozzle array in a single service visit, ensuring consistent spray patterns across the facility.

What is the specific advantage of the "1L" (Low Proximity) design?

The 1L nozzle is designed to be mounted closer to the hazard than standard H-style nozzles. Its internal orifice is calibrated to disperse the wet chemical agent in a wider, softer pattern ideal for the shallow depths of an exhaust plenum. This prevents the agent from bouncing off surfaces, ensuring a uniform foam blanket for faster fire knockdown.

Why should I purchase the 10-pack instead of individual units?

For professional service providers, the 551026 10-pack ensures inventory standardization. During inspections, it is common to find nozzles with baked-on grease or damaged threads; a 10-pack allows for the immediate replacement of an entire hood's nozzle array, ensuring consistent spray patterns across the facility.

Are these nozzles compatible with the original Kitchen Knight (KKI) systems?

No. The 1L nozzle is specifically engineered for the Kitchen Knight II system's hydraulic requirements. Using them in a non-KKII network voids the UL 300 listing and could lead to improper agent atomization during a fire event.