Watts 152A M3 NSNBC01 Regulator Valve

The Watts 152A M3 NSNBC01 Regulator Valve is a steam pressure reducing regulator that automatically maintains downstream steam pressure in commercial and industrial steam distribution systems. It is commonly installed in boiler plants, process heating equipment, sterilizers, autoclaves, steam tables, heat exchangers, laundry systems, and manufacturing process lines that require accurate steam pressure control. The valve is a direct-acting regulator from the 152A series and uses a cast iron body with stainless steel trim, stainless steel screen, stainless steel disc, and replaceable stainless steel seat. It accepts up to 200 PSI inlet pressure and provides a reduced pressure range of up to 3–140 PSI, depending on spring configuration. Features include a sensitivity adjuster for critical flow applications and a serviceable in-line design for maintenance. The connection type is female NPT threaded, and the regulator is intended for automatic downstream steam pressure regulation in process steam distribution systems, suitable for boilers, sterilizers, autoclaves, heat exchangers, and related process equipment. Common replacements include Watts 152AT, 152SS, and Spirax Sarco BRV2 for cross-brand compatibility.