This clamp is primarily the standard replacement part for the AFB and NFB spring-return series

the switch opens the electrical circuit to shut down the heating element or burner

protecting the refrigeration compressor from cycling on a fault

typically installed at the return side of the coil

Belimo LF24-SR Actuator Els PW 17895 This clamp is primarily theThe Belimo LF24 SR is a dedicated spring return actuator designed for modulating control in HVAC systems, providing 35 in lb torque for dampers and valves. Running on a 24VAC DC power supply, it utilizes a 2 10VDC control signal to deliver precise proportional positioning. This direct coupled actuator features a mechanical spring return system, ensuring a fail safe position during power lossa critical requirement for smoke control or outdoor air