🔍 Key Concepts

• Trace the flow path of steam and air through the gland seal regulator body and manifold. • Note which line or chamber is physically connected to the bellows marked "I" in the illustration. • Think about what pressure the regulator must sense in order to automatically adjust the gland sealing steam supply.

💭 Think About

• From the illustration, where does the pressure inside bellows I come from? Follow the small passages and arrows connecting to that bellows. • Which of the listed pressures (lube oil, gland seal steam, steam throttle, control air) would logically need to act on this bellows so the regulator can maintain proper seal pressure at varying turbine loads? • Compare the location of bellows I to the locations labeled for the steam manifold and outlet. Which pressure will change in step with the condition that the regulator is trying to control?

✅ Before You Answer

• Verify which line (by arrow and label) actually leads into the bellows I chamber—this is the decisive clue. • Confirm that lube oil and control air systems are not directly shown as connections to bellows I in this drawing. • Make sure the pressure acting on bellows I is one that would reasonably be used as a feedback signal for a gland seal regulator.