Tronair 18-4201-1010 Automatic Pneumatic Nitrogen Booster, Up to 4,000 PSIG

The Tronair 18-4201-1010 Nitrogen Booster is designed to raise low supply-bottle nitrogen pressure to the higher levels required for aircraft servicing tasks, including landing gear, struts, and high-pressure accumulator systems. It enables technicians to reach pressures up to 4,000 PSIG using standard shop air as the drive source. Its automatic cycling pump provides consistent boosting performance without manual intervention. Because many aircraft require nitrogen pressures higher than partially depleted bottles can supply, the booster maximizes nitrogen utilization and improves servicing efficiency.

The nitrogen booster requires a minimum nitrogen supply bottle pressure of 500 PSIG to function properly. If pressure drops too low, the system cannot boost effectively and may fail to cycle. Tronair’s troubleshooting guide specifies that low inlet pressure is a common cause of slow or failed pump operation, so maintaining proper bottle pressure is essential for consistent output.

No. The unit is not approved for use with low-pressure components, such as aircraft tires. The booster outputs unregulated nitrogen equal to the supply pressure and can reach extremely high levels, creating a severe safety hazard if used improperly. Tronair specifically warns against using it on any low-pressure system to avoid the risk of injury or component damage.

The nitrogen booster operates using shop air at up to 150 PSIG, with a required flow of 80 SCFM to power the air-driven pressure amplifier. The regulator on the front panel enables technicians to adjust the delivered air pressure to achieve the proper nitrogen output. Keeping the air system clean and adequately filtered is critical to preventing valve contamination and performance issues.

The unit incorporates a non-resettable 5,700 PSI rupture disc assembly that opens if pressure exceeds safe limits. This disc protects the aircraft system, the booster, and the operator from over-pressurization scenarios. Once a rupture occurs, the unit becomes inoperable until the disc is replaced according to the procedure outlined in the manual.

If system pressure exceeds approximately 5,700 PSI, the disc ruptures, venting nitrogen safely downward and depressurizing both the aircraft system and the supply bottle. The booster immediately stops functioning until the rupture disc is replaced. Tronair emphasizes that only approved rupture discs should be used and that the area beneath the unit must remain clear during operation for safety.

Tronair recommends that pressure gauges be inspected and calibrated annually to ensure accuracy. The shop air filter element should also be inspected and replaced yearly or when a pressure drop of 15 PSIG is observed. Regular maintenance ensures precision during aircraft nitrogen servicing and helps prevent contamination issues within the nitrogen system.

The air cycling valve in the booster’s pump assembly requires lubrication at least twice a year, or more frequently under heavy use. This valve operates independently of the nitrogen section, allowing safe servicing without exposure to high-pressure gas. Proper lubrication helps maintain cycling consistency and prevents sluggish pump behavior.

Only qualified personnel are authorized to service the nitrogen booster, and modifications are strictly prohibited without prior written approval from Tronair. Unauthorized repairs or alterations void the warranty and may compromise operator safety. When service is needed, Tronair recommends contacting their support team for approved procedures or replacement parts.

Before connection, all valves must be closed, the regulator should be set to minimum pressure, and the fill line should be loosely attached and purged. Purging removes contaminants and prevents sudden hose movement from uncontrolled nitrogen flow. Once purged, the connection can be tightened, and the system prepared for boosting.

Tronair recommends storing the unit in a clean, dry area with all hoses capped to prevent contamination. Covering the booster helps protect fittings and internal passages from debris. Proper storage ensures the purity of nitrogen during future servicing operations and prolongs the equipment's service life.

Even small contaminants can damage high-pressure check valves, restrict pilot lines, or compromise the cleanliness of an aircraft's nitrogen system. Tronair stresses that nitrogen systems must remain exceptionally clean to prevent operational failures. Keeping hoses capped, following purge procedures, and replacing filters on schedule helps maintain system integrity.

Yes. Tronair supplies OEM replacement parts, including filters, gauges, O-rings, hose assemblies, rupture discs, and valve components. The manual includes a detailed parts list and diagrams to ensure accurate identification of service items, and Tronair’s aftermarket support portal provides quick access to parts ordering and service assistance.

No, the Tronair 18-4201-1010 Automatic Pneumatic Nitrogen Booster is not CE marked.