this part is the correct technical replacement for many legacy 4-inch globe valve configurations

a manual reset for lockout conditions

Standardized Ports: Features 3/4" NPT connections for seamless integration into existing gas trains

though you must always verify the specific requirements on the furnace or unit heater nameplate during commissioning

Enhanced Protection: Features a factory-installed 4 Amp manual reset breaker to protect downstream components from shorts and thermal overloads

Schneider Electric (Barber Colman) M573-3520 Actuator Freon this part is the correctThe Schneider Electric (Barber Colman) M573 3520 Actuator is a heavy duty pneumatic damper actuator designed for precise proportional or two position control in commercial HVAC systems. This piston damper actuator features a substantial 3 inch stroke and is factory calibrated with a 5 to 10 psi spring range, making it ideal for managing airflow in multi zone units, fan coils, and large mixing boxes. Engineered for durability, the M573 3520 is a direct