Armstrong International A5572 Vacuum Breaker

The Armstrong International A5572 is a professional-grade 3/8" NPT vacuum breaker specifically engineered for high-performance steam trap maintenance and system protection. Made from robust stainless steel, this industrial vacuum breaker automatically relieves induced vacuums in condensing equipment, preventing common field failures such as pipe collapse and destructive water hammer. As a critical component for float & thermostatic traps, the A5572 ensures positive drainage even during modulated control or rapid system shutdown.

This HVAC vacuum breaker is natively compatible with several Armstrong F&T steam trap series, including the AI2, A3, AI3, A4, AI4, A5, B2, BI2, B3, BI3, B4, BI4, and B5. Its small footprint and 3/8" male NPT connection allow for direct installation into the trap cap or high points of heat exchangers. This part is essential for contractors managing systems in medical facilities, food processing, or chemical plants where maintaining stable pressure differentials is vital for operational safety and equipment longevity.

Key Benefits:

• System Protection: Effectively prevents coil freezing and equipment implosion by breaking vacuums during steam condensation.
• High Compatibility: Dedicated fit for 3/8" NPT steam traps across the Armstrong A and B series.
• Durable Construction: Full stainless steel body resists corrosion and handles maximum service pressures up to 150 psig.
• Improved Drainage: Eliminates condensate holdback, ensuring efficient heat transfer in heat exchangers and jacketed kettles.

Common Questions:

How do I install the A5572 to prevent debris buildup?
Technicians should install a short nipple and two street elbows before the vacuum breaker. This configuration prevents dirt and pipe scale from falling into the valve and causing leaks.

Can this be used on vacuum return lines?
No. Conventional vacuum breakers like the A5572 should not be used if the steam trap discharges into a vacuum return system, as it would constantly admit air into the return line.

When is a vacuum breaker absolutely required?
A vacuum breaker is necessary whenever a system uses modulated control or where the potential for a sub-atmospheric condition can stall condensate drainage, leading to water hammer or freezing.

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.