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