🔍 Key Concepts

• Trace the flow path from the outlet through passage J and see where it leads inside the body. • Think about the job of diaphragm E in a pressure‑control valve and what pressure it must "feel" to work properly. • Distinguish between the pilot/auxiliary valve section at the top and the main valve/piston section in the middle.

💭 Think About

• Follow the drilled passage from port J inward: does it connect into the chamber under the operating piston, or does it rise toward the diaphragm chamber? • If J were used to bleed off pressure, where would that pressure have to go geometrically in this drawing? Does the sketch show that connection? • Ask yourself which component needs downstream pressure information in order for this type of control valve to regulate outlet pressure automatically.

✅ Before You Answer

• Identify clearly which part is the main valve (A/K) and which is the auxiliary or pilot valve (around D/E). • Verify exactly where the passage marked H goes, and how it connects J to upper parts of the valve body. • Confirm whether the space directly beneath the operating piston is connected to J, to inlet pressure, or controlled by the auxiliary valve.