🔍 Key Concepts

• Operation of a centrifugal purifier – how oil and water separate into light and heavy phases in the bowl • Water seal in the purifier bowl – what the water seal does and how its level is maintained or changed • Conservation of volume/flow – what must happen inside the bowl when some water is removed from the oil phase

💭 Think About

• Think about where the separated water actually goes once it leaves the lube oil inside the bowl. Does it stay inside the bowl, leave the bowl, or change the geometry of the oil column? • Consider how the water seal is established at start-up and what happens to that seal level when additional water is introduced or removed during normal operation. • If a certain volume of water is taken out of the oil and sent to the heavy phase side, what must happen to the existing water already in the bowl to keep the internal levels and flows stable?

✅ Before You Answer

• Be clear on which is the light phase (oil) and which is the heavy phase (water and solids) in a purifier. • Review how the water seal is formed and why it must be maintained to keep oil from discharging with the water. • Ask: Does the purifier normally keep all water inside the bowl, or does separated water continuously discharge through a specific outlet?