Armstrong AX-20V - AX-20V Pre-Charged ASME Expansion Tank

Maintain consistent pressure and protect your commercial hydronic heating or chilled water system from damaging fluctuations with the Armstrong AX-20V pre-charged expansion tank. This high-capacity, ASME-certified vessel is engineered to accommodate the expansion of system fluid as it heats, preventing relief valve discharge and component stress in demanding mechanical environments.

The AX-20V utilizes a rugged, pre-charged diaphragm design that provides a reliable air-to-water barrier, effectively isolating the system fluid from the internal air cushion. By absorbing the volumetric changes caused by temperature shifts, this tank ensures stable system pressure, which extends the service life of boilers, pumps, and terminal units throughout the facility.

Key System Performance Baselines:

• ASME Certified: Manufactured to strict ASME pressure vessel codes for maximum safety and institutional compliance.
• Heavy-Duty Diaphragm: High-grade internal membrane prevents waterlogging and air absorption into the system fluid.
• Corrosion Resistance: Durable exterior coating ensures long-term integrity in varied mechanical room conditions.
• Efficient Volume Control: Specifically sized to manage thermal expansion effectively in medium-to-large scale hydronic circuits.

⚠️ Application Profile: Ideal for commercial heating loops, large-scale chilled water systems, industrial process piping, and multi-zone hydronic installations requiring ASME-rated pressure control.

📋 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.