Johnson Controls A-4000-156 Filter Assembly

The Johnson Controls A-4000-156 Filter Assembly is a critical component for maintaining pneumatic control system integrity by removing moisture and particulates from the air supply. This 5 micron condensate filter features an automatic drain mechanism, ensuring continuous moisture removal without manual intervention, which prevents downstream regulator clogging and actuator failure. Designed as a direct Johnson Controls replacement part, the A-4000-156 is engineered for instrument-grade air filtration within commercial HVAC pneumatic lines. Its rugged construction handles fluctuating line pressures while maintaining a low pressure drop across the element. For technicians, installing this pneumatic air filter is standard protocol during preventative maintenance to protect sensitive thermostats and controllers from oil aerosols and water carryover. Proper integration of the A-4000-156 condensate filter extends the service life of the entire pneumatic network by ensuring clean, dry air delivery to all terminal devices.

• 5 Micron Filtration: Captures fine particulates and prevents orifice fouling in pneumatic controllers.
• Automatic Condensate Drain: Eliminates manual blow-down requirements and prevents moisture carryover.
• High System Compatibility: Seamlessly integrates into existing Johnson Controls pneumatic air stations.
• Maintenance Efficiency: Transparent bowl allows for quick visual inspections of contaminant levels.
• Operational Reliability: Built to withstand industrial environments, ensuring stable control air quality.

How often should the 5-micron element be replaced?
Replacement intervals depend on compressed air quality, but inspecting the element for discoloration or significant pressure drop during quarterly maintenance is recommended for optimal pneumatic performance.

Can the automatic drain be bypassed or serviced?
The automatic drain is designed for autonomous operation; however, the internal float and seal can be cleaned if debris prevents the valve from seating properly.

What is the maximum operating pressure for the A-4000-156?
This assembly is typically rated for standard pneumatic supply pressures up to 150 PSI, though it is most commonly utilized in 20-30 PSI control loops.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.