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Smaller Electric Actuators Fulfill Expanded Needs

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Update time : 2017-05-24 15:53:08
The conventional perception of a motorized valve is one of a large isolating valve with a heavy-duty valve actuator, usually powered by a three-phase electrical supply. However, many processes require smaller valves, and those valves often call for small electric actuators for isolating and modulating applications. As a result, the number of these smaller actuators is steadily growing.
The HVAC industry has used small electric actuators on valves and dampers for some time. However, the increased need for smaller size automation for heavier industrial applications that operate in hazardous or hostile environments has created an additional need.
In recent years, valve actuator manufacturers have improved small electric actuators’ performance. Part of the reason is that new technologies in electric motor design and more robust micro control circuitry make those improvements possible. As a result, reliability has increased and costs have decreased.
These improvements allow the demands of some applications to be met with both a commercially attractive and practical solution using motor-operated valves (MOVs), sometimes controlled from a considerable distance.
The higher efficiency of these actuators also means less power is needed to operate the valves. This is particularly important for applications in remote areas where the power distribution lines may not stretch. Even where power is available, it is often significantly less expensive to run low-voltage, single-phase or DC power lines compared to higher voltage, three-phase lines.