521509A | 3w Thermo Mixing Vlv 3/4"SWT | Caleffi Power Rating_5KW this ring handle provides a

this ring handle provides a secure and comfortable grip for precise handling

The stainless steel enclosure ensures durability in harsh environments

this motor ensures consistent performance and smooth operation

Engineered to provide reliable performance and durability

Upgrade your Navien equipment today with the Control Board KDC-324 and experience reliable performance for years to come

521509A | 3w Thermo Mixing Vlv 3/4"SWT | Caleffi Power Rating_5KW this ring handle provides a3 Way Thermo Mixing Valve (521509A) by Caleffi Caleffi's 521509A is a 3 way thermo mixing valve designed to control the temperature of mixed water in hydronic heating and cooling systems. It features a compact and durable brass body with a 3 4" SWT connection, ensuring longevity and reliability. With its precise temperature control, this valve maintains a consistent mixed water temperature, preventing scalding or discomfort. It operates on a wide