The Festo MS6-MVM is a manually operated on-off valve designed for pressurizing and exhausting compressed air systems. As part of the modular MS series of air preparation units, it integrates seamlessly to provide a reliable method for system shutdown and maintenance. Its primary function is to serve as a 3/2-way valve, allowing for the safe and complete venting of downstream pressure. The rotary knob actuator can be locked in the closed position using a padlock, making it ideal for implementing Lockout-Tagout (LOTO) safety procedures during service or repair work.