The SMC VHS40-N04A-Z residual pressure relief valve provides manual control for safely exhausting compressed air from pneumatic circuits before maintenance or servicing. It uses a 1/2-inch NPT port and a 3-port design that blocks supply pressure while venting downstream air when the handle is turned to the exhaust position. The valve mounts inline in air preparation assemblies and pairs with filters, regulators, and lubricators to protect workers from unexpected actuator movement in industrial automation equipment.
