Badger Industry Guard Low Overhead Nozzle, Single Item - 83-844258-000

The Kidde-Fenwal 83-844258-000 (also referenced as 844258) is a precision-engineered low overhead nozzle for dry chemical local application. In industrial environments where open-top tanks of flammable liquids are present, a high-velocity discharge is counterproductive -- if the suppressant strikes the surface too hard, it can splash flaming liquid onto the facility floor and create a running fuel fire. The 83-844258-000 solves this with an internal velocity-reduction screen that converts high-pressure kinetic energy into a controlled, low-velocity solid cone spray pattern, allowing ABC, BC, or Purple-K agents to settle onto the hazard surface like a blanket rather than an impact tool.

This soft-landing capability is a safety mandate for dip tanks and quench tank applications where oil-based hazards require a gentle but high-volume application to achieve total flame knockdown without splash. The 2 flow point rating provides a high-volume delivery that is mathematically balanced for Kidde-Fenwal and Badger manifolds, ensuring every nozzle in a multi-tank array receives the exact agent volume required.

Low Overhead vs. High Overhead

Low overhead nozzles like the 83-844258-000 are intended for mounting heights close to the hazard. The internal velocity-reduction screen is the defining feature, enabling soft-landing discharge mandatory for open-top tanks where splashing is a risk. High overhead nozzles rely on high-velocity reach to push agent through a heat plume at greater distances and lack an internal screen entirely. Substituting a high overhead nozzle in a quench tank application is a critical safety violation and voids the UL/FM listing.

Nickel-Chrome Plated Brass Construction

The nickel-chrome plating provides superior resistance to the caustic vapors found near dip tanks and paint booths compared to standard brass, keeping the orifice dimensions precise and the threads structurally sound over a 10-year service life in aggressive solvent environments.

Blow-Off Cap Protection

Every low overhead nozzle must be fitted with a 83-259100-000 nozzle cap to prevent grease, paint, and dust from clogging the velocity-reduction screen. During discharge, internal pressure pops the cap off instantly. Missing or debris-laden caps must be replaced at every semi-annual inspection.

Screen Integrity Audit

The internal stainless steel screen must be checked for corrosion or hardened chemical deposits during each NFPA 17 inspection. A clogged screen restricts flow and disrupts the hydraulic balance of the entire manifold, potentially leaving hazards unprotected.

Plating and Thread Verification

Inspect the nickel-chrome plating and 3/8" NPT threads for pitting caused by solvent vapors, particularly in paint booth installations. Structural thread failure can cause the nozzle to separate from the pipe during a discharge event.

Why is the 83-844258-000 plated in nickel-chrome?

Nickel-chrome plated brass provides superior resistance to the caustic vapors found near dip tanks compared to standard brass. This ensures the nozzle remains clean and the orifice dimensions stay precise over a 10-year service life in aggressive industrial environments.

Can this nozzle be used with the Badger Range Guard wet chemical system?

No. The 83-844258-000 is calibrated for dry chemical agents. Using it in a wet chemical system will result in an immediate clog due to the difference in fluid viscosity between the two agent types.

What happens if I install this nozzle without the internal screen?

Without the velocity-reduction screen, discharge velocity would be high enough to splash burning liquid out of the tank, spreading the fire. The nozzle would no longer function as a low overhead unit and the UL/FM safety listing would be voided.