In the illustrated self-contained, internal-pilot, piston-operated steam pressure- reducing valve, what statement is true concerning the opening and c...

Question

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? GS-0044

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.

Engine: Expired / General Subjects

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? GS-0044

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