NA15559 | NA15559 | Caleffi

**NA15559 Caleffi** The NA15559 is a high-temperature, automatic bypass valve by Caleffi. It maintains constant flow rate in the primary loop, bypassing the heat exchanger when differential pressure is too low. The NA15559 is ideal for commercial applications with multiple heat exchangers in parallel, preventing flow problems and ensuring system efficiency. **Technical Specifications:** * Automatic bypass valve * Brass body * 3/4" NPT connections * Maximum working pressure: 116 psi * Maximum working temperature: 356°F **Key Features:** * Maintains optimal flow rate * Prevents flow problems in parallel heat exchanger systems * Ensures efficient heat exchanger performance * Durable brass construction for longevity **Benefits:** * Improved system efficiency * Reduced maintenance costs * Optimal heat transfer * Peace of mind knowing your system is protected Our HVAC supply store offers the best prices and fast shipping on the NA15559 Caleffi valve. Shop now to ensure your commercial heating system runs smoothly and efficiently.