Serving as the direct replacement for 5H74976-1

Solid-State Durability: Provides faster switching and longer operational life compared to standard electromechanical relays

reducing the need for field modifications

Its compact profile and union connections simplify installation and field service

Universal Compatibility: Fits extensive 310AAV and 310JAV furnace series from Carrier

Armstrong International B1669-1 Pressure Change Assembly Els PW 17895 Serving as the direct replacementThe Armstrong International B1669 1 Pressure Change Assembly (PCA) is a critical steam trap repair kit engineered specifically for inverted bucket traps. This assembly includes a matched 1 4" orifice, valve seat, and lever mechanism, providing a direct drop in solution for maintaining trap efficiency. Designed for Armstrong 811, 211, 310, TVS 811, 881, 981, and EM series traps, this PCA is calibrated for a 15 PSI maximum operating pressure. Utilizing