Armstrong International B1669-3 Assembly

The Armstrong International B1669-3 is a precision-engineered pressure change assembly designed for field maintenance and performance restoration of inverted bucket steam traps. This assembly features a 5/32" orifice, specifically calibrated for consistent condensate discharge and optimal seat closure under cycling loads. Engineered for rugged longevity, the B1669-3 serves as a direct replacement internal component for Armstrong 211, 310, 811, TVS-811, 881, 981, and EM series traps. By replacing the valve and seat assembly, technicians can eliminate steam loss caused by wire-drawing or erosion at the orifice interface. Constructed from high-grade stainless steel to resist corrosion and wear, this internal mechanism ensures the leverage ratio remains within OEM specifications for reliable trap operation. Integrating this inverted bucket trap repair kit component into a preventative maintenance schedule minimizes backpressure issues and maintains the thermal efficiency of the entire steam system.

• Compatible with a wide range of Armstrong inverted bucket traps including the 200, 300, 800, and 900 series.
• Features a durable 5/32" stainless steel orifice for high-cycle reliability in high-pressure applications.
• Direct-fit pressure change assembly simplifies the rebuilding process and reduces labor time during outages.
• Maintains rigorous condensate drainage standards to prevent water hammer and system scaling.

Is the B1669-3 assembly compatible with the TVS-811 series?
Yes, this assembly is a verified replacement part for the TVS-811 series, as well as the 211, 310, 811, 881, 981, and EM inverted bucket models.

What causes an orifice to fail in an inverted bucket trap?
Most steam trap failure in the orifice is caused by "wire-drawing" or erosion from high-velocity condensate and debris, which prevents a tight seal and leads to live steam loss.

Does this assembly include the bucket or just the valve and seat?
The Armstrong B1669-3 is a pressure change assembly focusing on the valve and seat mechanism required to restore the trap's primary sealing function.

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.