125LB Wheeled Ansul Redline Long Range (Purple K)

The Ansul Red Line CR-LR-I-K-150-C is a 125 lb long-range wheeled cartridge-operated fire extinguisher charged with Purple K (potassium bicarbonate) dry chemical — the highest-rated wheeled Purple K unit in the Red Line 150-C family. Rated 320-B:C, it is the correct specification for facilities facing the largest credible Class B and C fire scenarios, where both maximum suppression per pound and maximum effective range are simultaneously required. The "LR" designation indicates the factory-installed long-range nozzle, which extends the operator's standoff distance beyond that of the standard nozzle — a critical safety advantage in high-intensity fuel fires that produce extreme radiant heat.

Purple K (potassium bicarbonate) is the most effective dry chemical agent for Class B fires — approximately twice as effective per pound as sodium bicarbonate. At 125 lbs with a 320-B:C rating and the long-range nozzle's extended reach, the CR-LR-I-K-150-C delivers the highest Class B suppression capacity at the greatest standoff distance of any wheeled Purple K unit in the Red Line family. The unit carries USCG approval and is the primary specification for aviation, offshore, and large fuel terminal applications where simultaneous high agent volume and safe working distance are both non-negotiable. The "I" designation confirms the indicator fill cap as a standard feature, and "CR" confirms the corrosion-resistant finish for marine and coastal environments.

Purple K Agent and BC Suppression

Purple K (potassium bicarbonate) suppresses Class B and C fires by rapidly interrupting the free-radical chain reaction in the flame zone. At a molecular level, the potassium ions neutralize the reactive intermediates in the combustion chain faster and more completely than sodium bicarbonate — which is why Purple K achieves a 320-B:C rating with only 125 lbs of agent, while a comparable sodium bicarbonate unit of the same size would carry a lower rating. The agent provides no Class A coverage and is not effective on ordinary combustibles — for mixed-hazard environments requiring Class A protection, the FORAY (ABC) wheeled model is the correct specification.

Long-Range Nozzle and Standoff Advantage

The standard Red Line wheeled nozzle provides an effective range of 25 feet. The long-range nozzle of the CR-LR-I-K-150-C extends this distance, allowing the operator to engage the base of a large fuel fire from a position that is safer from radiant heat, burning fuel spray, and flash-back risk. In aviation and large fuel terminal applications, this additional standoff distance is a meaningful safety improvement for the operator deploying the unit at close range to a high-intensity fire.

Red Line Wheeled Platform Features

• Indicator Fill Cap: Red stem indicator pops up when the unit is pressurized, providing immediate visual readiness confirmation during inspections without requiring a gauge.
• Corrosion-Resistant Finish: Epoxy paint over polyester powder coat with black anodized fill cap and nozzle body for long service life in marine, offshore, and coastal environments.
• 50-Foot Hose: 3/4 in. x 50 ft discharge hose provides positioning flexibility to reach the fire from a safe staging location.
• USCG Approved: Meets USCG requirements for marine vessel and port facility fire protection where Purple K is the specified agent.
• On-Site Recharge: Can be recharged by a certified technician on-site using Ansul-approved Purple K dry chemical without shop pressurization equipment.

The CR-LR-I-K-150-C is the primary specified choice for high-hazard environments requiring maximum Purple K suppression capacity with extended standoff distance:

• Aviation Refueling and Hangars: Aircraft refueling operations where large aviation fuel fires demand the highest B:C rating and the long-range nozzle keeps operators at safe distance from burning aviation fuel.
• Offshore Oil and Gas Platforms: Process modules and wellhead areas where large-scale flammable liquid fires are the credible hazard and the corrosion-resistant finish addresses the salt air environment. USCG approval satisfies marine compliance requirements.
• Large Fuel Storage Terminals: Petroleum terminals, loading racks, and fuel depot manifold areas where the largest credible fuel spill fire scenario requires 320-B:C capacity and standoff distance.
• Marine Ports and Vessels: Dockside fuel operations and large vessel engine rooms where USCG-approved wheeled Purple K protection is required and salt air demands the CR finish.
• Petrochemical Facilities: Process areas with large flammable liquid inventories where a single wheeled unit must be capable of addressing the maximum credible fire event.

To maintain NFPA 10 compliance and USCG approval, the CR-LR-I-K-150-C must follow a documented maintenance schedule:

• Monthly Visual Inspection: Verify the nitrogen cylinder valve is closed and the safety seal is intact. Check that the indicator fill cap is not pressurized at rest. Inspect the 50-foot hose and long-range nozzle assembly for damage. Confirm inspection tags are current.
• Annual Maintenance: A certified technician must inspect all components, verify nitrogen cylinder condition, check the long-range nozzle for wear or blockage, and confirm Purple K agent has not packed. Document on the inspection tag.
• 6-Year Internal Examination: Full internal inspection per NFPA 10 including agent removal and cylinder interior inspection. Recharge with Ansul-approved Purple K dry chemical only.
• 12-Year Hydrostatic Test: The agent tank must undergo hydrostatic pressure testing per NFPA 10 and DOT requirements to verify structural integrity.

Why does this unit hold 125 lbs when other Red Line wheeled units hold 150 lbs?

Purple K (potassium bicarbonate) is approximately twice as effective per pound as sodium bicarbonate on Class B fires. The 125 lb Purple K wheeled unit achieves a 320-B:C rating — higher than a 150 lb sodium bicarbonate unit — because of Purple K's superior per-pound suppression efficiency. The lower agent weight is a function of the agent's effectiveness, not a capacity limitation.

What does the long-range nozzle add compared to the standard Purple K wheeled model?

The standard CR-I-K-150-C wheeled Purple K model uses a standard nozzle with a 25-foot effective range. The CR-LR-I-K-150-C's long-range nozzle extends the operator's effective standoff distance, allowing engagement of a large fuel fire from a safer position further from the radiant heat and burning fuel spray. In aviation and offshore applications where fire intensity is extreme, this additional distance is a meaningful operational and safety advantage.

Is Purple K effective on Class A fires?

No. Purple K is a BC-only agent. It will knock down visible flames on ordinary combustibles but will not quench deep-seated embers and re-ignition is likely. For environments where Class A combustibles coexist alongside large flammable liquid hazards, the Red Line FORAY (ABC) wheeled model provides the required Class A coverage alongside B:C suppression.