Armstrong 573100-011 - A800-L Bladder-Type Expansion Tank

Efficient hydronic system pressure regulation is made simple with the Armstrong 573100-011, an essential component for the A800-L series. This high-quality expansion tank is engineered to absorb excess fluid volume caused by thermal expansion, preventing dangerous pressure spikes and protecting sensitive system components from premature wear.

The vessel functions by utilizing an internal diaphragm that separates the system water from a pressurized air cushion. As the boiler heats the water, the resulting expansion pushes against the diaphragm, allowing the system to maintain stable pressure levels without the need for constant venting. This closed-loop design also helps minimize oxygen infiltration, which is critical for reducing corrosion and extending the service life of your piping and heat exchangers.

Key System Performance Baselines:

• Pressure Regulation: Precisely manages thermal expansion to maintain consistent system pressure.
• Component Protection: Extends the lifespan of pumps, valves, and boilers by mitigating pressure-related stress.
• System Efficiency: Maintains a sealed environment to prevent oxidation and optimize heat transfer.

⚠️ Application Profile: Designed specifically for residential and light commercial hydronic heating applications where reliable pressure management and ease of installation are required.

📋 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.