Armstrong International B1669-1 Pressure Change Assembly 30067439-890 View the blade from the

View the blade from the discharge side

Constructed from high-grade Nitrile Butadiene Rubber (Buna-N)

while the 24 VAC/DC relay coil compatibility makes it a standard choice for building automation systems and motor control centers

the ZG-LMSA ensures a rigid connection without introducing mechanical slop or hysteresis into the HVAC damper control sequence

Armstrong International B1669-1 Pressure Change Assembly 30067439-890 View the blade from theThe 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