Common Questions & Technical Support What does "Open on Rise" mean for this switch

Dual Connection Options: Features both screws and 1/4-inch quick-connect tabs

Key Benefits Ensures precise fuel delivery and thermal efficiency after natural gas conversion

Commercial Grade Build: Rugged construction ensures long-term reliability in high-cycle industrial HVAC applications

Designed specifically for compatibility with 0

Armstrong International B1669-5 Pressure Change Assembly 30067439-890 Common Questions & Technical SupportThe Armstrong International B1669 5 Pressure Change Assembly is the critical repair component for restoring the positive shut off and operational efficiency of inverted bucket steam traps. Featuring a precision lapped 7 64" orifice, this PCA kit is engineered to withstand differential pressures from 125 PSI to 250 PSI depending on the trap body. As a veteran grade steam trap repair part, the B1669 5 includes the stainless steel valve, valve seat,