🔍 Key Concepts

• Steam plant vacuum raising sequence – what has to be ready before you pull a vacuum on the condenser • Role of lube oil system and turning gear when getting a turbine ready to turn • Function and prerequisites of circulating/condensate pumps, air ejectors, and gland sealing system

💭 Think About

• In what condition must the main turbine and reduction gears be before you apply gland sealing steam and air ejectors? Cold and stopped, or already being lubricated and slowly rolled? • Do you want vacuum on the condenser before or after you have reliable lubrication and circulation of cooling water/condensate? Why? • Look for the choice that puts lubrication and safe slow turning of the turbine in place before building full vacuum and sealing steam around the shaft glands.

✅ Before You Answer

• Make sure lube oil system is started before anything that could allow the turbine to rotate or load the bearings • Verify that turning gear engagement happens only after lube oil pressure is established, not before • Check that air ejectors and gland sealing are not started until there is circulating and condensate flow so the condenser can actually pull and maintain vacuum safely