Refer to the drawing of four air-operated valves ___

Refer to the drawing of four air-operated valves (see figure below).

Note: The valve actuators may be shown with or without air pressure applied.

Given:

  1. The direction of system flow is from left to right when the valves are open.
  2. The internal components for each valve are identical except for the orientation of the valve disk and seat.
  3. The valve actuators exert the same force on the attached valve stem for a given applied air pressure.

If each actuator is vented, which valve disk will remain closed with the most force?

A. A.
B. B.
C. C.
D. D.

Show Answer

Answer: C

Share your understanding of this question with the correct explanation.

1 Like