Description
The Zilmet ZETA-60 is a heavy-duty, ASME-certified hydronic expansion tank designed to maintain stable pressure in large closed-loop heating, cooling, and HVAC systems. With a 40-gallon capacity, this expansion tank is perfect for commercial buildings, multi-zone hydronic networks, or high-demand residential applications. Its fixed butyl diaphragm and durable steel construction ensure reliable long-term performance, protecting boilers, pumps, piping, and heat exchangers from pressure spikes caused by thermal expansion.
Key Features
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40-Gallon Capacity
Provides a large buffer for thermal expansion in high-demand heating or chilled-water systems, preventing pressure fluctuations and system stress. -
ASME Section VIII Certified
Built to rigorous ASME standards for safety, performance, and code compliance in commercial and industrial applications. -
Fixed Butyl Diaphragm
Separates system fluid from air charge, preventing waterlogging and maintaining stable operation over the tank’s lifetime. -
Robust Carbon Steel Construction
Heavy-duty shell ensures long-lasting performance and resistance to high temperatures, pressures, and system stress. -
High Pressure & Temperature Ratings
Rated for up to 150 PSI and 240°F, suitable for water and water/glycol mixtures in commercial and large residential hydronic systems. -
Pre-Charged & Ready for Installation
Ships ready to install, reducing setup time and simplifying integration into existing or new systems.






