as well as PAE50 units

these are simply variations of the same Sensus part number used in different inventory systems

How do I confirm if my actuator requires the FYBA-53-9 or the FYBA-539

High Compatibility: Universal SPST open-high action and wide AC voltage ratings (up to 277Vac) allow this part to serve as a drop-in replacement for various HVAC temperature controllers

Precise Analog Control: The dual analog inputs allow for sophisticated tracking of temperature

Belimo B218+LRB24-3 Valve Assembly Els PW 17895 as well as PAE50 unitsThe Belimo B218+LRB24 3 Valve Assembly is a high performance 3 4 inch 2 way Characterized Control Valve (CCV) solution designed for precise hydronic regulation in air handling and fan coil units. This assembly features a rugged stainless steel trim and ball, ensuring superior corrosion resistance and longevity in demanding HVACR environments. With a Cv of 7. 4 and an equal percentage flow characteristic, it provides the throttling accuracy typically