this valve is the industry standard for replacing manual valves in baseboard or straight-run radiator applications

An integrated internal check valve makes this unit fully compatible with heat pump applications

providing a factory-set 100 psi limit for consistent refrigerant flow control

The hub is positioned on the intake side for a 1/2 inch bore

Belimo AFB24-X1 Actuator 319852-301 this valve is the industryThe Belimo AFB24 X1 is a heavy duty spring return damper actuator engineered for reliable fail safe operation in commercial HVAC systems. Delivering a robust 180 in lb torque, this unit is designed to drive dampers to a safe position during power loss, ensuring critical fire and smoke containment or system protection. Operating on a 24VAC DC power supply, it features a brushless DC motor that provides precise on off control while maintaining high