Description
The Zilmet ZETA-40 is a high-capacity, ASME-rated hydronic expansion tank engineered to stabilize pressure in closed-loop heating, chilled-water, and glycol-based HVAC systems. With a 26-gallon tank volume, this model is ideal for larger residential applications, commercial hydronic networks, multi-zone boiler systems, and chilled-water loops that demand reliable thermal expansion control. Built with a fixed butyl diaphragm and heavy-duty steel shell, the ZETA-40 delivers long-lasting performance and code-compliant safety.
Key Features
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Large 26-Gallon Capacity
Provides ample expansion buffer for medium to large hydronic systems, ensuring consistent pressure under fluctuating temperatures. -
ASME Section VIII Certified
Meets rigorous ASME pressure-vessel standards—required in many commercial and industrial installations. -
Fixed Butyl Diaphragm
Permanently separates system fluid from the air charge, preventing waterlogging and supporting stable, long-term performance. -
Heavy-Duty Carbon Steel Construction
Rugged steel shell resists stress, corrosion, and demanding heating/cooling conditions. -
High Pressure & Temperature Ratings
Typically rated up to 150 PSI and 240°F, compatible with water and water/glycol mixtures. -
Pre-Charged and Ready for Installation
Simplifies setup, reduces installation time, and supports instant system integration.
