Johnson Controls A-4000-142 Valve Station

The Johnson Controls A-4000-142 is a professional-grade dual pressure reducing valve station designed for critical pneumatic control systems requiring high-capacity 20 SCFM airflow. This integrated unit combines a four-way bypass valve with a multi-stage filtration system to ensure "instrument-quality" air. The process begins with a coalescing filter to remove oil aerosols and liquid water, followed by an activated charcoal filter that eliminates oil vapors. Built with a rugged copper tubing manifold, the station minimizes friction and meets strict fire codes for mechanical equipment rooms. It handles input pressures up to 150 PSIG and maintains precise output regulation within a 0.2 PSI variation. For contractors, the factory-assembled design includes dual PRVs and integrated gauges to simplify monitoring and maintenance in large-scale HVACR applications.

• Multi-Stage Filtration: High-efficiency coalescing and activated charcoal filters remove 99.9% of oil aerosols and odors to protect sensitive pneumatic components.
• Continuous System Operation: The 4-way bypass valve allows technicians to service filters without shutting down the entire pneumatic loop.
• High Flow Capacity: Delivers up to 20 SCFM, making it suitable for multi-zone commercial control systems.
• Durable Construction: Features all-copper internal piping for maximum corrosion resistance and compliance with mechanical room safety standards.
• Precision Control: Dual regulators come factory set but are fully adjustable to meet specific site requirements.

What is the maximum input pressure for the A-4000-142?
This station is rated for a maximum input of 150 PSIG and an operating temperature limit of 125°F.

How do I know when to replace the filter elements?
Technicians should monitor the integrated gauges; a pressure differential of 15 PSI or more typically indicates that the coalescing filter or charcoal element is saturated and requires replacement.

Does this unit include the mounting bracket?
Yes, the A-4000-142 is shipped as a complete assembly with a heavy-duty wall mounting bracket and all necessary compression fittings for 1/2-inch O.D. tubing.

This item is not eligible for free shipping.

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.