Armstrong International B1669-4 Pressure Change Assembly Els PW 17895 delivering precise thermal output for

delivering precise thermal output for auxiliary or emergency heating stages

As an auxiliary flame sensor

providing clean circuit interruptions and consistent electrical performance for professional mechanical contractors

The "L48" designation indicates the inclusion of the OPD 48 over-pressure device

The Raypak 800203B is the standard 3/4-inch ID gasket found in many atmospheric and digital commercial models

Armstrong International B1669-4 Pressure Change Assembly Els PW 17895 delivering precise thermal output forThe Armstrong International B1669 4 Pressure Change Assembly is a precision engineered internal component designed to restore the peak performance of your steam system. Featuring a 1 8" orifice, this assembly is vital for maintaining the mechanical integrity and discharge capacity of inverted bucket steam traps. It is fully compatible with a wide range of Armstrong models, including the 211, 310, 800, 811, TVS 811, 880, 881, 981, and EM Series.