🔍 Key Concepts
• Notice the H.P. and L.P. units at the bottom of the illustration and think about what shipboard components are arranged in high‑ and low‑pressure pairs.
• Look at the vessels marked A, B, C, and D on the left and consider whether they are handling steam leakage/seal steam or throttle (control) oil/steam.
• Study the right‑hand side with the needle valve, spring, and float‑type chamber (K, L) and decide if it is regulating seal pressure/condensate level or throttle position/speed.
💭 Think About
• For a throttle control system, what physical movement would you expect to see shown in the diagram (e.g., a link to a governor and a throttle valve)? Do you see that here?
• For a gland sealing system, what needs to be controlled between the H.P. and L.P. sections of a turbine, and how would condensate return be shown? Compare that idea to the flow paths marked by arrows H, I, and the tank on the right.
• Ask yourself whether a turbo‑generator would normally share this particular arrangement simultaneously with both H.P. and L.P. turbine sections, as shown at the bottom of the figure.
✅ Before You Answer
• Identify whether the main working fluid in the sketch appears to be seal steam/condensate or control oil/steam for throttling.
• Confirm that the components at the bottom labeled H.P. and L.P. match what you would find on main propulsion turbines rather than on a separate turbo‑generator unit.
• Verify whether the regulator on the right is maintaining a relatively constant pressure/level (typical of gland sealing) or directly changing valve opening with speed/load (typical of throttle control).