Arizona Drivers License Practice Test

Which of the following is a disadvantage of a single-seated control valve?

It requires a large actuator to close against high pressure It cannot close tightly It is only used for on/off control It cannot be used with pneumatic actuators

Correct Answer:

It requires a large actuator to close against high pressure

Explanation:

Because the fluid pressure pushes against the entire area of the single plug, a large force (large actuator) is required to close it tightly.

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