NA20657C | NA20657C | Caleffi

**Caleffi NA20657C Expansion Tank** The NA20657C is a high-performance expansion tank designed to protect closed hydronic heating systems from excessive pressure and temperature fluctuations. With a capacity of 0.5 gallons, it effectively absorbs and compensates for changes in water volume caused by temperature variations. **Key Features:** * Durable carbon steel construction with electrolytic coating for corrosion resistance * Pre-charged with nitrogen to maintain system pressure * Butyl diaphragm separates water from air, ensuring system efficiency * Maximum working pressure of 12 bar (174 psi) * Operating temperature range of 14°F to 248°F **Benefits:** * Prevents system damage from overpressure and expansion * Maintains optimal system pressure for efficient operation * Minimizes water loss and air accumulation in the system * Extends the lifespan of system components **Applications:** * Closed hydronic heating systems * Domestic and commercial installations * Applications with fluctuating water temperatures and pressures Choose the Caleffi NA20657C Expansion Tank for reliable and effective pressure and temperature management in your hydronic system. Our HVAC supply store offers the best prices and fast shipping, ensuring your project runs smoothly.