Spirax Sarco B1H-30 Inverted Bucket Steam Trap

The Spirax Sarco B1H-30 Inverted Bucket Steam Trap is a rugged cast-iron, inline inverted-bucket trap designed for reliable condensate removal in steam lines. It features 1/2" FNPT ends, a maximum operating pressure of 30 psig, and a maximum temperature rating of 450°F. The unit's body is ASTM A126 Class B cast iron and it measures about 5 inches in length, enabling compact installations in standard piping runs. In inverted bucket traps, condensate entering the trap fills a float bucket that lowers a valve to discharge the condensate while blocking live steam, providing efficient condensate lift and minimizing steam loss; Spirax Sarco notes this design is robust and able to resist water hammer. The B1H-30 is part of Spirax Sarco's B Series of cast-iron inverted bucket traps and is typically installed in horizontal lines where condensate returns to the boiler or condensate receiver. This model is specifically identified as 64148 in Spirax Sarco's catalog and is intended for general industrial steam systems requiring dependable condensate drainage at moderate pressures and temperatures.