SMC Corporation VHS30-N03B-Z Pneumatic Lockout Valve

SMC VHS30-N03B-Z is a three-port, single-action pneumatic lockout valve that isolates the supply pressure in a pneumatic line and exhausts downstream pressure to enable safe maintenance. It uses 3/8 in nominal NPT ports and has a die-cast aluminum body designed for industrial environments. The valve operates over a pressure range of 0.1 to 1 MPa (about 14.5 to 145 psi), making it compatible with common plant air systems. Locking holes integrated into the body accept padlocks, providing a physical locking point to enforce a lockout during servicing and preventing inadvertent re-energization. In practice, this VHS30-N03B-Z is used where maintenance workers need to secure residual pressure and vent downstream air before performing work on pneumatic circuits, aligning with standard lockout/tagout safety procedures. Typical applications include safety lockout on manufacturing lines, presses, CNC machines, and other automated equipment that rely on compressed air.