Bench set Flashcards

1
Q

What are the two mechanical adjustments that need to made when coupling a an actuator?

A

mechanically adjusting the the stem connector and the spring adjuster.

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2
Q

Why does the stem connector need to be adjusted properly?

A

the stem connector must be adjusted so neither the actuator nor the valve trim prevents full travel of the valve trim.

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3
Q

What happens when the stem connector is set with the actuator and valve stems spaced too far apart? ( i.e. stem connector length is too long?)

A

Valve wont fully open

the actuator diaphragm will bind travel at the upper end and the valve plug will bind travel at the lower end.

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4
Q

what happens when the stem connector is set with the actuator and valve stems too closely coupled? (i.e stem connector length is too short)

A

Valve wont fully close

the actuator diaphragm will bind travel at the lower end and the valve plug will bind travel at the upper end. .

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