This assembly features an MT Series spring return, fail closed actuator working in tandem with our GOW Series declutchable gear override. If you need to manually operate an automated valve during shutdown, maintenance, or emergency situations, a declutchable gear operator is the perfect way to do it. Max-Air accessories also included are 48 Series Limit Switch Box, SV Series solenoid valve w/ speed controls, and a filter/regulator to keep instrument air supply clean and dry.