20LB Ansul Redline Cartridge (High Flow) (Purple K)

The Ansul Red Line HF-I-K-20-G is a 20 lb High Flow cartridge-operated hand-portable fire extinguisher charged with Purple K (potassium bicarbonate) dry chemical. The "HF" designation signifies the factory-configured high-flow nozzle that delivers agent at a significantly higher mass flow rate than the standard Red Line model — specifically engineered per NFPA 10 for pressurized flammable liquid fires and pressurized gas fires where agent flow rate is critical to extinguishment. Rated 120-B:C, it achieves a higher suppression rating than the standard 20 lb Purple K model (RL-PK-20-G, rated 80-B:C) despite the same agent volume, through the higher flow rate delivery system.

Every unit includes an Indicator Fill Cap and a Corrosion Resistant Cap as standard features. The Indicator Fill Cap pops up a red stem when the unit is pressurized, providing an immediate visual readiness check. The Corrosion Resistant Cap protects the fill opening in the humid and chemically aggressive environments where the HF-I-K-20-G is typically deployed. The unit carries a 12-year limited warranty and is approved by UL, ULC, FM, and USCG.

Why High Flow Matters for Pressurized Liquid and Gas Fires

Standard extinguisher flow rates are optimized for pool fires and spill fires at atmospheric pressure. Pressurized flammable liquid fires — such as those involving pressurized fuel lines, hydraulic systems under pressure, or LPG leaks — present a fundamentally different challenge. The pressurized fuel stream feeds the fire faster than a standard-flow agent delivery rate can suppress it. The HF-I-K-20-G's high-flow nozzle overcomes the fuel supply rate, enabling knockdown that a standard-flow Purple K unit of the same agent capacity may not reliably achieve on pressurized hazards.

Purple K's superior per-pound effectiveness on Class B fires — approximately twice that of sodium bicarbonate — combined with the high-flow delivery system makes the HF-I-K-20-G the highest-performance 20 lb hand-portable BC unit for pressurized hazard applications.

Included Features

• High Flow Pressure: Factory-configured high-flow nozzle for pressurized flammable liquid and gas fires per NFPA 10.
• Indicator Fill Cap: Red stem indicator pops up when the unit is pressurized for an immediate visual readiness check without requiring a gauge.
• Corrosion Resistant Cap: Protects the fill opening against moisture and corrosive atmosphere ingress in marine, offshore, and chemical vapor environments.
• Field Recharge: Cartridge-operated design allows on-site recharge by a certified technician without shop equipment.
• 12-Year Limited Warranty: Ansul's 12-year limited warranty from date of delivery.

The HF-I-K-20-G is specified wherever pressurized flammable liquid or gas fires are a credible hazard and the 20 lb form factor is appropriate:

• Pressurized Fuel Lines and Systems: Refineries, pipelines, and process facilities where pressurized hydrocarbon streams can produce torch fires requiring high flow rates to suppress.
• LPG and Compressed Gas Facilities: Propane and natural gas operations where pressurized gas fires require agent delivery rates exceeding standard extinguisher capability.
• Aviation Fueling and Ground Support: Aircraft fueling operations where pressurized fuel system fires demand immediate high-flow Purple K response and the 20 lb size provides better maneuverability than the 30 lb unit.
• Offshore Platforms: Process piping and wellhead areas where the combination of Purple K agent and high flow rate is the appropriate first-response tool, and the 20 lb unit balances suppression capacity with portability in tight spaces.
• Hydraulic System Fires: Heavy industrial equipment with high-pressure hydraulic systems where oil injection fires demand high-flow agent delivery.

To maintain NFPA 10 compliance, the HF-I-K-20-G must follow a documented maintenance schedule:

• Monthly Visual Inspection: Verify the nitrogen cartridge safety seal is intact, the pull pin and tamper seal are in place, and the indicator fill cap shows no pressurization at rest. Confirm the corrosion resistant cap is intact and the hose and high-flow nozzle are free of damage or obstruction.
• Annual Maintenance: A certified technician must inspect all components, verify nitrogen cartridge condition, check the high-flow nozzle assembly 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, cylinder interior inspection, and component replacement as needed.
• 12-Year Hydrostatic Test: The carbon steel agent tank must undergo hydrostatic pressure testing per NFPA 10 and DOT requirements.

What is the difference between this and the standard 20 lb Purple K (RL-PK-20-G)?

The HF-I-K-20-G uses a high-flow nozzle and is rated 120-B:C. The standard RL-PK-20-G uses a standard flow nozzle and is rated 80-B:C. Both contain 20 lb Purple K charges. The high-flow model achieves the higher rating through mass flow rate — it is specifically designed for pressurized flammable liquid and gas fires per NFPA 10. If your hazard is standard pool or spill fires, the RL-PK-20-G is the appropriate specification. If pressurized fuel or gas fires are credible, the HF-I-K-20-G is the correct choice.

Why choose the 20 lb over the 30 lb high-flow Purple K (HF-I-K-30-G)?

Both carry 120-B:C ratings. The 30 lb HF-I-K-30-G provides greater agent volume and a longer discharge duration at a higher charged weight of 51.5 lbs. The 20 lb HF-I-K-20-G is more maneuverable and better suited for confined spaces or installations where weight and size are limiting factors. Specify the 30 lb model when agent volume is the priority and the installation allows for the heavier unit.

Is this unit appropriate for standard pool or spill fires?

Yes. Per NFPA 10, high-flow extinguishers can extinguish standard Class B fire types in addition to pressurized scenarios. The HF-I-K-20-G is effective on all Class B and C fires — it is simply optimized for the more demanding pressurized hazard scenarios where standard-flow units may not achieve reliable knockdown.