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? Illustration GS-0044

Question

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.

Answer

The spring (F) force acting on the control diaphragm is a pilot valve opening force, and the upstream pressure

Answer

The spring (F) force acting on the control diaphragm is a pilot valve closing force, and the upstream pressure (C) acting on the control diaphragm is a pilot valve opening force.

Answer

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

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