Schneider Electric MK-7121 Pneumatic Actuator

The Schneider Electric MK-7121 Pneumatic Actuator is a reliable linear actuator engineered for precise air-powered control in industrial automation. The rugged die-cast aluminum body provides lasting durability while delivering a compact footprint: 7-3/4" wide, 7-5/8" deep, and a 4-1/2" stroke. Designed for 30 PSIG system pressure, this actuator offers a 2-position On/Off proportional control signal and a nominal spring range of 8–13 PSIG, enabling smooth, repeatable operation across applications. The MK-7121 supports a 1/8" female end connection and features a neoprene diaphragm with a 50 in² effective area for reliable actuation. It includes a heavy-duty mounting plate for easy integration, and its NEMA 1 protection rating ensures basic indoor suitability for many environments.

• Stroke: 4-1/2 inches
• End Connection: 1/8" Female Threaded (Air)
• Torque Rating: 22.5 in-lbs at 15 PSI; 67.5 in-lbs at 15/20 PSI
• Pressure Rating: 30 PSIG
• Body Material: Die-Cast Aluminum
• Diaphragm: Neoprene, 50 in²
• Control Signal: 2-Position On/Off Proportional
• Ambient Temperature: -20 to 220 Deg F
• Protection: NEMA 1
• Includes: Heavy Duty Mounting Plate