Dwyer ACT-MD04-220VAC is a pneumatic and electric actuator suitable for temperatures ranging from -40 to 140°F (-40 to 60°C). It can be powered by 110 VAC, 220 VAC, 24 VAC, or 24 VDC. With an enclosure rating of NEMA 7, it meets hazardous location requirements. The actuator features 1/2" female NPT electrical connections, a position indicator, and two limit switches. It is made of powder-coated aluminum and has various connection options. The DA series is double-acting, while the SR series is spring return. Supply pressure varies based on the model. It is designed for modulating input and has a duty rating specified in the instruction manual. Accessory mounting follows the NAMUR standard.