20LB Ansul Redline Cartridge (High Flow & Corrosion Resistant) (Purple K)

The Ansul Red Line CR-HF-I-K-20-G-1 is a premium, cartridge-operated fire extinguisher engineered specifically for the most aggressive Class B and C fire scenarios in corrosive environments. In facilities where flammable liquids are handled under pressure — such as fuel loading racks, chemical refineries, and aircraft hangars — a standard flow rate is often insufficient to knock down a rapidly escalating flame front. This High Flow model is calibrated to discharge its Purple K agent at an accelerated rate, exceeding the one-pound-per-second delivery rate recommended for high-hazard fires.

Built as part of the Industrial series, this model features enhanced corrosion resistance, making it the definitive choice for offshore platforms and heavy manufacturing sites exposed to salt air and chemical vapor. The CR designation adds a corrosion-resistant finish over the standard polyester powder coat, with black anodized hardware throughout. By isolating the nitrogen propellant in an external cartridge, the Red Line system ensures the agent remains unpressurized and free-flowing during standby, eliminating the risk of gradual pressure loss.

The Science of High-Flow Suppression: Overcoming 3D Fire Dynamics

1. Mass Flow Rate Advantage

Standard extinguishers prioritize discharge duration. The HF designation means this unit is engineered to discharge its 20 lbs of agent rapidly. This high mass-flow rate is essential for pressure-fed fires where fuel may be leaking from an overhead pipe or running down a vertical surface. The high-velocity cloud overcomes thermal updrafts to deliver the agent directly to the fuel-air interface.

2. Purple K (Potassium Bicarbonate) Kinetics

Purple K is the most effective dry chemical agent for Class B flammable liquid fires. At a molecular level, it interferes with the free radicals in the fire's chemical chain reaction. Because this unit is High Flow, it delivers a higher concentration of this suppression chemistry per second than a standard 20 lb unit, providing near-instantaneous knockdown of volatile flames.

3. Cartridge-Driven Fluidization

When the plunger is struck, the gas enters the bottom of the tank through a specialized nozzle, fluidizing the Purple K powder so it behaves like a liquid. This ensures a consistent discharge even if the unit has been subjected to constant vibrations on an industrial floor or service vehicle.

The Industrial Series Advantage: Engineered for Harsh Environments

• Corrosion-Resistant Coating: The tank is treated with a finish designed to withstand salt spray and chemical vapors, preventing the structural pitting that leads to failed inspection results in marine and coastal environments.
• High Flow Pressure Indicator Fill Cap: This specialized cap provides visual confirmation of readiness, allowing a fire technician to verify at a glance that the agent tank is not under accidental pressure.
• Field-Serviceable Architecture: A technician can recharge the unit on-site in minutes — a significant logistical advantage for remote sites that cannot wait for off-site service.

The CR-HF-I-K-20-G-1 is the primary choice for high-risk zones where portable fire protection must be immediate:

• Fuel Storage and Loading Racks: Protecting manifold areas where pressure-fed fuel leaks are a credible hazard.
• Aircraft Hangars and Tarmacs: Providing the rapid knockdown required for aviation fueling fires.
• Oil and Gas Refineries: The standard for offshore platforms where Purple K is required for its superior Class B performance and the CR finish addresses the salt air environment.
• Marine Operations: USCG approved with the correct bracket, and the corrosion-resistant construction makes it ideal for engine rooms and deck areas in salt air environments.

To maintain NFPA 10 compliance and ensure your facility passes its fire inspection, the CR-HF-I-K-20-G-1 must follow a strict maintenance protocol:

• Monthly Visual Inspection: Verify the activation plunger is in the up position and the safety seal on the cartridge is intact. Inspect the corrosion-resistant finish for chips or corrosion breakthrough. Confirm inspection tags are current.
• Annual Professional Maintenance: A certified technician can remove the fill cap to verify the agent's fluidity — a process significantly faster than stored-pressure unit teardowns.
• Cartridge Weight Verification: During every service, the gas cartridge must be weighed to ensure no propellant has leaked.
• 6-Year Internal Examination: Full internal inspection per NFPA 10 including agent removal and cylinder interior inspection.
• 12-Year Hydrostatic Test: Mandatory to verify the structural integrity of the steel pressure vessel.

Where can I find service and genuine agent for High Flow Purple K units?

Visit a specialized fire equipment store or an authorized Ansul dealer to ensure you receive the correct Purple K agent and nitrogen cartridges for this unit.

Can I use this on a wood fire?

No. Purple K is a BC-only agent and is not rated for Class A fires. While it will knock down visible flames, it will not quench embers and re-ignition is likely. For environments with ordinary combustible exposure alongside flammable liquid hazards, specify the FORAY (ABC) version instead.

How do I operate this unit in an emergency?

Strike the activation plunger firmly to pierce the nitrogen cartridge and pressurize the tank, then use the PASS method: Aim the high-velocity nozzle at the base of the fire, Squeeze the discharge lever, and Sweep from side to side across the base of the flames.