Festo MS6-EM1-1/2-S manual shut-off valve, part number 541268, is a high-performance rotary slide valve designed for MS6 modular air service units. Featuring 3/2-way bistable functional design, it enables stable manual switch and air circuit isolation for pneumatic systems. Equipped with standard G1/2 pneumatic port, the valve delivers an impressive nominal flow rate of 8700 l/min, meeting high-flow pneumatic system operation demands. The integrated silencer realizes silent exhaust without additional ducting, optimizing on-site working environment. Made of robust die-cast aluminium housing and wear-resistant TPE-U(PU) sealing materials, it ensures excellent durability and tight sealing. It works stably within 0~18 bar pressure range, compatible with standard filtered compressed air and inert gas. Supporting flexible inline installation and optional mounting positions, it is an essential safety and control component for industrial automation air preparation systems, used for equipment maintenance isolation and emergency air source cut-off.