Spirax Sarco FIG34-11 2" ANSI 150 relief valve (A21SWCB) is a safety valve that protects steam systems from overpressure by venting steam when the set pressure is reached. The unit uses a 2-inch connection with ANSI 150 flange sizing, aligning with common boiler-plant piping. This valve is intended for automatic pressure relief in industrial steam services, such as boilers and steam distribution lines that require reliable overpressure protection.
