ROSS Controls 1523C3002 NSNBC01 Valve

ROSS Controls 1523C3002 NSNBC01 is a 15 Series manual energy-isolation valve in the L-O-X line, designed for lockout/tagout procedures in pneumatic systems. It is a 3/2 (three-port, two-position) valve with 3/8" NPT inlet/outlet ports and an integrated 1/8" NPT sensing port on the valve body for connecting a pressure indicator or pressure switch to verify that downstream pressure has dropped to zero before maintenance. Typically installed as the first valve in the machine air-supply line, it provides immediate energy isolation upstream of downstream control valves and actuators and is not intended to replace safety-rated stop functions or control interlocks. The 15 Series designation identifies this as part of the Classic/High-Capacity variant within the family (C), reflecting a rugged, reliability-focused design for industrial pneumatic circuits. This model supports common L-O-X accessories such as indicators or pressure switches to provide visual or electrical confirmation of zero-pressure conditions, enabling safer maintenance workflows without altering existing machine control logic. The 1523C3002 listing is a standard 3/2 manual-lockout valve in the Ross Controls L-O-X lineup, with the NSNBC01 suffix indicating a catalog configuration variant.