137. In the illustrated self-contained, internal-pilot, piston-operated steam pressure-reducing valve, what statement is true concerning the opening and closing forces acting upon the control diaphragm

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Accepted Answer

the spring (f) force acting on the control diaphragm is a pilot valve opening force, and the downstream pressure (j) acting on the control diaphragm is a pilot valve closing force.

137. In the illustrated self-contained, internal-pilot, piston-operated steam pressure-reducing valve, what statement is true concerning the opening and closing forces acting upon the control diaphragm

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