Overview
The Johnson Controls A-4000-1049 is a high-performance coalescing oil removal filter designed to deliver clean, oil-free air for pneumatic control systems. Operating in series with an activated charcoal filter, this 3/8-inch NPT unit effectively eliminates both oil aerosols and vapors to protect downstream pneumatic equipment from contamination. It features an integrated automatic drain to automatically expel accumulated entrapped liquids and a differential pressure indicator to signal when the filter element requires maintenance.
Features
- Dual-stage purification removes both oil aerosols and vapors for comprehensive air treatment
- Automatic drain system automatically blows out entrapped liquid accumulations to maximize service life
- Integrated differential pressure indicator provides local visibility into filter status and maintenance needs
- Constructed with a durable plastic bowl suited for demanding mechanical equipment room environments
- Cost-saving design minimizes friction and supports higher airflow rates when integrated into pneumatic stations
Specifications
- Model Number: A-4000-1049
- Connection Size: 3/8 inch NPT ports
- Maximum Flow Capacity: 20 SCFM (9.4 L/s)
- Filtration Efficiency: 99.999+% efficient for particles 0.025 microns and larger
- Maximum Operating Pressure: 150 psig (1,050 kPa)
- Maximum Temperature Limit: 125°F (52°C)
Applications
- Pneumatic air supply and climate control systems in commercial and industrial facilities
- Mechanical equipment rooms requiring clean, oil-free compressed air for building automation systems
- Standard oil removal filtration setups following an air compressor and air dryer station



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