Disadvantages • The primary disadvantage of
an electric actuator is that,
should a power failure occur, the valve remains in the last position and the fail-safe position cannot be obtained easily unless there is a convenient source of stored electrical energy.
• Higher cost than pneumatic actuators. The total cost ranges from $800 to $3,000 and up. High component costs often deter the use of electric actuators because savings in operating costs compared to pneumatics are often not adequately considered or are outright ignored.
• The actuator needs to be in an environment that is rendered safe. Generally not recommended for flammable atmospheres.
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