Armstrong International B1669-5 Pressure Change Assembly

The 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, valve retainer, lever, and guide pin assembly, ensuring a full mechanism overhaul without removing the trap from the piping. This assembly is specifically designed for Armstrong 211, 310, 800, 811, TVS-811, 880, 881, 981, and EM series traps. Utilizing a genuine Armstrong PCA ensures the internal linkage geometry matches factory specifications, preventing common issues like steam loss from worn valve seats or the trap failing to prime during sudden pressure drops.

Key Benefits:

• Optimized Compatibility: Direct fit for leading Armstrong inverted bucket traps including the 800 and 880 series.
• Heavy-Duty Construction: Stainless steel internal components resist erosion and corrosion in high-velocity steam applications.
• In-Line Maintenance: Swap the pressure change assembly quickly to minimize system downtime and labor costs.
• Precision Orifice: The 7/64 inch orifice is factory-calibrated for consistent condensate discharge and air venting.
• Superior Sealing: Metal-to-metal ground joint between the valve seat and the trap cap eliminates the need for thread lubricants.

Common Questions:

Which Armstrong traps are compatible with the B1669-5 assembly?
This PCA is used in the 211, 310, 800, 811, TVS-811, 880, 881, 981, and EM series. Always verify your trap’s maximum operating pressure matches the 7/64" orifice rating.

What is included in the B1669-5 PCA kit?
The kit contains the valve, valve seat, valve retainer, lever, and the guide pin assembly with mounting screws. Note that body gaskets are typically sold separately.

Does the 7/64" orifice work for all pressures?
The B1669-5 is generally rated for 125 PSI in 800/880 series traps and up to 200-250 PSI in higher-pressure models like the 211 or 981. Check your specific trap stamping to confirm.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.