The Group 57 rotary valve actuator from Harold Beck & Sons can be used in remote applications where line power is not readily available and/or in hazardous environments where explosive gases are present. In addition to traditional Beck actuator features like the 100 percent continuous-duty, no-burnout motor and virtually no required maintenance, it offers the ability to run on 12-48 volts DC power, making it ideal for use with solar panel operation. It has Class I, Division 1, Groups B, C and D hazardous location ratings. If offers built-in electric fail-safe capability with optional, internal ultracapacitor backup power, fast stroking speeds (9 seconds for 90 degrees) or applications with fast open or close requirements, simple and flexible valve mounting options including compliance with the ISO 5211 part-turn, Actuator Mounting Standard or custom hardware to fit virtually any valve. Space-efficient packaging makes it easier to fit on valves in any orientation. 215-968-4600; www.haroldbeck.com