🔍 Key Concepts

• Gland seal regulator function on a main steam turbine • Which medium actually enters the regulator body through the manifold at points A–D • How the force balance on piston F is created (what pressure is acting on its bottom side)

💭 Think About

• Trace the flow path shown by the arrows from the manifold to piston E, then to piston F. Which working fluid clearly moves through that path? • Ask yourself: in an actual steam turbine gland sealing system, which of the four listed media is normally used as the sealing and sensing medium inside this regulator? • Look at the springs above piston F. What provides the opposing force to those springs from below?

✅ Before You Answer

• Identify which inlet (A, B, C, or D) corresponds to the turbine steam gland connection, and which arrows show that same medium reaching piston F • Confirm that neither lube oil nor control air is shown entering the chamber directly beneath piston F in this drawing • Be sure the medium you choose is something that would reasonably be routed to the turbine glands themselves, not just to control instrumentation (verify typical gland seal system descriptions in your steam plant text)