R-102 Double Tank Nitrogen Cartridge, 73022

The Ansul R-102 Double Tank Nitrogen Cartridge (73022) is the high-pressure propellant engine engineered for extensive commercial kitchen fire suppression systems. In large-scale culinary environments such as stadium concessions, university dining halls, and hotel banquet kitchens, the fire hazard often spans 15 to 25 feet of continuous cook line. Protecting this footprint requires the simultaneous discharge of multiple tanks. The 73022 is specifically designed to provide the massive volume of dry nitrogen gas required for a synchronized discharge event of two 3.0-gallon agent tanks.

Constructed from high-tensile steel and finished in an industrial-grade red powder coat, the 73022 is a mission-critical component of the AUTOMAN release mechanism. By utilizing a single high-capacity propellant source to drive a master-slave tank configuration, facility managers can reduce mechanical failure points, ensuring that the ANSULEX agent reaches every nozzle with the exact velocity needed to suppress a grease fire before it reaches the exhaust duct.

High-Volume Manifold Hydraulics

The 73022 operates on a puncture-and-regulate logic. Upon triggering, the nitrogen is released into the regulated release assembly where the approximately 2,092 PSI tank pressure is stepped down to a consistent 110 PSI (7.6 bar). This pressure stability ensures the 73022 provides enough nitrogen to fill the volume of two 3.0-gallon tanks while maintaining the discharge pressure required for a perfect misting spray.

Inert Stability Advantage

Unlike CO2, which fluctuates significantly based on ambient kitchen temperatures, high-purity dry nitrogen remains exceptionally stable. This inert stability ensures that the discharge timing of the R-102 system is identical whether the kitchen is at 70°F or 110°F.

Visual Readiness Audit

Unique to the larger Ansul cartridges, the 73022 features an integrated 0 to 4,000 PSI pressure gauge. This allows facility managers to perform a visual readiness audit without specialized tools. A needle in the green zone provides confidence that the propellant has not suffered a silent leak.

Lower Total Cost of Ownership

Standardizing on the 73022 for large hoods allows for a master-slave configuration. By using one large cartridge to power two tanks, you eliminate the need for secondary control heads, reducing the per-inspection labor cost.

Maintaining the Design Envelope

The R-102 is a listed system. Substituting a generic cylinder is a fire code violation that can lead to a short-discharge, where the agent fails to finish the suppression, leading to a catastrophic re-flash event.

DOT 3E-1800 Structural Reliability

Manufactured to meet the highest safety standards, the 73022 is a ruggedized pressure vessel engineered to withstand high-vibration environments and the rigorous thermal cycles of 24/7 cooking operations.

• Large-Scale Institutional Kitchens: Protecting long batteries of fryers and tilt-skillets with a dual-tank manifold.
• Stadium and Arena Concessions: Providing a high-capacity propellant for kiosks where downtime after a flare-up must be minimized.
• Hotel Banquet Facilities: Ensuring that massive high-flow hood lines have the pneumatic force to achieve total flooding.
• Duct-Only Protection: Often used where specialized protection requires the sustained discharge of large volumes of ANSULEX.
• Retrofit Modernization: Upgrading older single-tank systems to dual-tank capacity to meet the demands of modern, high-output cooking equipment.

The Weight-Stamp Audit

During every 6-month inspection, the technician must remove the 73022 and weigh it on a calibrated scale. This weight-stamp audit is the only code-legal method for verifying the charge. If the weight deviates from the stamped weight on the cylinder body, it must be replaced.

Gross Integrity Verification

While the gauge provides a quick visual check for gross integrity, it is not a substitute for the mandated weight check. The gauge allows for granular monitoring of the high-pressure vessel between professional service visits.

One-Time Use Protocol

The 73022 is a one-time use component. Once the system has fired, the empty cartridge is a spent asset. Facility owners should maintain a spare 73022 on-site to ensure the system can be re-armed immediately.

Gas-Tight Seal Inspection

During every service, the technician must inspect the gold-colored seal and mounting threads. Any signs of corrosion can prevent a gas-tight seal when the cartridge is screwed into the AUTOMAN release.

Can I use the 73022 to drive three tanks?

Generally, the 73022 is listed for a two-tank 3.0-gallon configuration. If your system design requires three tanks, you may need a larger LT-30-R or a manifolded propellant setup. Always consult your system's as-built drawings.

Why is there a gauge on this cartridge but not on smaller ones?

The higher volume of nitrogen in the 73022 makes it more susceptible to temperature-based expansion. The gauge allows for more granular monitoring of this high-pressure vessel, which is critical for systems protecting multi-million dollar kitchen assets.

Is it possible to self-install a replacement cartridge?

No. While it may seem simple, the 73022 must be installed by a certified technician. This ensures the AUTOMAN release is properly armed and that the seal is verified to prevent a silent leak.