Armstrong 573100-009 - A500-L Bladder-Type Expansion Tank

Reliable pressure management is essential for the longevity and efficiency of your hydronic system, and the Armstrong 573100-009 A500-L expansion tank provides the critical control required for residential and commercial setups. Designed to accommodate the expansion of water as it heats, this A500-L model effectively prevents excessive pressure buildup that can stress components, seals, and piping, ensuring your system operates within safe design parameters.

This tank utilizes a pressurized air cushion separated from the system water by a flexible diaphragm. As the temperature rises and the water volume increases, the diaphragm pushes against the air chamber, compressing the air and absorbing the additional volume. This maintains a stable system pressure throughout the heating cycle, preventing frequent relief valve discharge and system water loss.

Key System Performance Baselines:

• Pressure Regulation: Maintains consistent system pressure during thermal cycling.
• Component Protection: Reduces wear on circulators and seals by managing expansion loads.
• Reliability: Engineered for durability in high-demand hydronic environments.

⚠️ Application Profile: Ideal for closed-loop hydronic heating systems, radiant floor heating, and baseboard circulation networks requiring stable expansion management.

📋 Procurement & Shipping Notice

• LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
• Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?

👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.