🔍 Key Concepts

• Identify how the handle (E), spring, and diaphragm (I) work together in this valve • Notice the labeled INLET and OUTLET and think about when flow occurs through this device • Compare the construction to common shipboard valves used in sanitary (toilet) systems versus high‑pressure or relief valves

💭 Think About

• When the handle is operated, what happens to the diaphragm and the flow path from INLET (II) to OUTLET (III)? • Does this design look more suited for continuous pressure control, emergency injection, or a short-duration controlled discharge? • Which of the choices typically uses a hand-operated, diaphragm‑type valve with an internal pilot arrangement like this?

✅ Before You Answer

• Confirm whether this valve appears to be normally closed and only opens when the handle is moved • Check if there is any feature that would automatically open at a set pressure like a pressure relief valve • Ask whether high‑pressure feedwater systems usually use a small hand lever and diaphragm like this, or a different type of pumped, positively controlled arrangement