Armstrong B1671-6 PCA

Armstrong B1671-6 PCA is the OEM pressure-change assembly used to replace the regulating mechanism inside Armstrong steam traps. This PCA corresponds to PCA F/813,213 and features a 7/32-inch orifice with a 180 psi operating rating, designed for compatibility with multiple Armstrong trap models. The part is sold as a genuine Armstrong replacement (Armstrong Part No. B1671-6) and is commonly listed for traps such as 213, 313, 413, 813, 863, and 883, with some catalogs also noting compatibility with models like 312/313 and 973/983. Weighing about 1 lb, the B1671-6 is described in supplier catalogs as a pressure-change assembly for traps that use a 7/32" orifice, intended to manage pressure fluctuations and maintain proper condensate handling in HVAC steam systems. As an OEM component, it’s positioned as a direct replacement to restore trap operation after wear without requiring other alterations to the trap body. In practice, this kit is used in commercial and industrial steam systems to ensure reliable trap performance and minimize downtime during maintenance or repair of Armstrong steam-trap assemblies.