Description
The Johnson Controls A-4000-605 is a replacement coalescing filter element engineered to deliver clean, dry compressed air in pneumatic control systems. Rated at 40 SCFM, this element efficiently captures oil aerosols, water droplets, and fine particulate contamination before they can reach sensitive downstream components such as pneumatic actuators, controllers, and positioners.
Why Coalescing Filtration Matters
In pneumatic HVAC and building automation systems, contaminated air supply is one of the leading causes of actuator and controller failure. Coalescing filter elements work by forcing compressed air through a fine fiber matrix that causes tiny oil and water droplets to merge — or coalesce — into larger droplets that drain away harmlessly. The result is cleaner instrument air that extends the service life of your pneumatic equipment and maintains precise control performance.
Key Features
- Designed as a direct OEM replacement for Johnson Controls pneumatic air preparation systems
- 40 SCFM flow capacity to support a wide range of pneumatic control applications
- Coalescing media captures oil aerosols, water mist, and fine particulates
- Protects downstream pneumatic actuators, controllers, and instruments from contamination
- Genuine Johnson Controls part for assured fit and performance
- Easy element replacement to minimize system downtime during maintenance
Applications
- Pneumatic HVAC control systems
- Building automation and DDC pneumatic air supplies
- Compressed air preparation for pneumatic actuators and positioners
- Industrial and commercial pneumatic instrument air systems
Maintenance Recommendation
Regular replacement of the coalescing filter element is essential to maintaining system efficiency. A clogged or saturated element increases pressure drop across the filter, reducing available supply pressure to pneumatic devices. Inspect the element periodically and replace as needed to ensure optimal system performance.
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