150LB Wheeled Ansul Redline (MET-L-KYL Dry Chemical)

The Ansul Red Line CR-I-ML-150-C (Part No. 417270) is a 150 lb wheeled cartridge-operated fire extinguisher charged with MET-L-KYL dry chemical — a sodium bicarbonate-based agent specifically formulated for suppressing pyrophoric metal alkyl fires, including triethylaluminum, triisobutylaluminum, and similar organometallic compounds that ignite spontaneously on contact with air. This is the most specialized unit in the Red Line wheeled family, built for chemical processing, petrochemical, and semiconductor facilities where metal alkyl compounds are handled at commercial scale and a hand-portable unit's 20 to 30 lb capacity is insufficient for the credible fire scenario.

Note: The CR-I-ML-150-C is Not UL Listed. MET-L-KYL agent addresses a unique hazard class that falls outside standard UL fire extinguisher test protocols. The Not UL Listed notation reflects the specialized nature of the pyrophoric metal alkyl hazard, not a product deficiency. This unit has No UL test requirements applicable to its hazard class. Specification must involve your fire protection engineer and authorized Ansul distributor.

MET-L-KYL Agent and Pyrophoric Metal Alkyl Suppression

Pyrophoric metal alkyls — including trialkyl aluminums and similar organometallic compounds — ignite on contact with air and react violently with water and most standard suppression agents. MET-L-KYL is sodium bicarbonate-based and specifically formulated to suppress these fires without triggering the violent secondary reactions that water, foam, CO2, or standard dry chemical agents produce. At 150 lbs of agent capacity, the CR-I-ML-150-C provides the volume required to address large-scale metal alkyl fire incidents that exceed the capacity of hand-portable MET-L-KYL units.

Red Line Wheeled Platform Features

• Indicator Fill Cap: The "I" designation in the model number confirms the standard indicator fill cap, which provides a visual pressurization status confirmation during inspections.
• Cartridge-Operated Reliability: The attached nitrogen cylinder keeps the agent tank at atmospheric pressure during standby, preventing agent packing and ensuring full discharge reliability after long standby periods common in pyrophoric metal alkyl facilities where fire events are infrequent.
• 50-Foot Hose: The 3/4 in. x 50 ft discharge hose allows the operator to position the unit at safe standoff distance from the fire area — essential for pyrophoric fires that may produce toxic fumes and require distance for operator safety.
• Corrosion-Resistant Construction: CR designation indicates epoxy paint over polyester powder coat with black anodized fill cap and nozzle body for long service life in chemical process environments.
• On-Site Recharge: Can be recharged by a certified technician on-site using Ansul-approved MET-L-KYL agent only — do not substitute any other dry chemical agent.

The CR-I-ML-150-C is specified for facilities where pyrophoric metal alkyl compounds are handled at industrial or commercial scale requiring wheeled unit capacity:

• Chemical Processing Plants: Facilities producing or using trialkyl aluminum compounds in polymerization catalyst systems where spill volumes demand wheeled unit capacity rather than hand-portable response.
• Petrochemical Facilities: Areas handling metal-organic catalysts used in polyethylene, polypropylene, and related polymer production processes at industrial scale.
• Semiconductor Manufacturing: Large-scale process areas handling metal-organic precursor compounds in chemical vapor deposition where a significant release could require more than a hand-portable unit can deliver.
• Research and Pilot Plants: Laboratories and pilot plant operations conducting organometallic chemistry at scale where pyrophoric metal alkyl fire risk has been documented in the facility hazard analysis.

To maintain NFPA 10 compliance, the CR-I-ML-150-C requires a documented maintenance schedule with additional considerations for the specialized MET-L-KYL agent:

• Monthly Visual Inspection: Verify the nitrogen cylinder valve is closed and the safety seal is intact. Confirm the indicator fill cap shows no pressurization at rest. Check the 50-foot hose assembly and confirm inspection tags are current.
• Annual Maintenance: A certified technician familiar with MET-L-KYL agent must inspect all components, verify nitrogen cylinder condition, and confirm 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 recharge with Ansul-approved MET-L-KYL agent only. Do not substitute any other dry chemical or dry powder agent.
• 12-Year Hydrostatic Test: The agent tank must undergo hydrostatic pressure testing per NFPA 10 and DOT requirements.
• Operator Training: Personnel must receive specialized training on pyrophoric metal alkyl hazards and MET-L-KYL application technique before this unit is placed in service. Standard fire extinguisher training is insufficient for this hazard class.

Why is this unit Not UL Listed?

UL's standard fire extinguisher listing programs test against Class A, B, C, and D fire scenarios. Pyrophoric metal alkyl fires are outside the scope of all standard UL test protocols — there are no UL test requirements applicable to this hazard class. The Not UL Listed notation reflects the specialized and unique nature of the pyrophoric metal alkyl hazard, not a product quality concern.

What is the difference between MET-L-KYL and MET-L-X?

MET-L-KYL is a sodium bicarbonate-based agent designed for pyrophoric metal alkyl fires — organometallic compounds that ignite spontaneously on contact with air. MET-L-X is a sodium chloride-based agent designed for Class D combustible metal fires involving magnesium, titanium, zirconium, and alkali metals. They address fundamentally different hazard types and are not interchangeable. Specifying the wrong agent for a pyrophoric metal alkyl fire can result in a dangerous secondary reaction.

When does a facility need the wheeled 150 lb unit versus a hand-portable MET-L-KYL?

The wheeled unit is specified when the credible fire scenario involves a volume of pyrophoric material that exceeds the suppression capacity of hand-portable units — typically determined by the facility's process hazard analysis. If a large-scale metal alkyl spill could result in a fire covering a significant floor area, the 150 lb wheeled unit provides the agent volume and discharge duration needed to achieve full suppression before re-ignition risk from the pyrophoric material overwhelms a hand-portable response.