The ER Series electric actuator provides economical, compact electrical automation for quarter-turn valves. The ER Series are high quality, economically priced, reversing quarter-turn actuators ideal for automating ball and butterfly valves. They offer compactness and a rugged design to develop high torque in minimum space. They are available in thirteen listed sizes from 100 in-lb to 14040 in-lb torque. The ER Series has many standard features, as well as a full range of optional features. Terminal strips in all sizes allow easy and efficient wiring. A wiring diagram is always furnished inside the actuator housing.