Spirax Sarco B1HS-250 Inverted Bucket Steam Trap

The Spirax Sarco B1HS-250 inverted bucket steam trap (model 64170) is a 3/4" FNPT connection with a cast-iron body, engineered for robust condensate drainage in saturated-steam systems. It features an integral stainless steel strainer and a stainless steel bucket, delivering reliable debris handling and long service life in dirty condensate lines; rated to 250 psig and 450°F, it suits medium-duty boiler feed and steam-distribution duties while minimizing live steam loss. As part of Spirax Sarco's B-series, the trap operates on the density difference between steam and condensate via an inverted-bucket mechanism, a design that removes condensate without excessive back pressure in most installations. Typical applications include boilers, steam mains, heating circuits, and process heating where consistent condensate removal is essential to protect equipment and maintain efficiency.