The valve shown in the illustration uses...

🔍 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.

The valve shown in the illustration uses port "J" to __________. See illustration GS-0044.

open the auxiliary valve

open the main valve

bleed off downstream pressure beneath the operating piston

allow downstream pressure to be sensed by diaphragm "E"

🔍 Key Concepts

💭 Think About

✅ Before You Answer