🔍 Key Concepts

• Centrifugal purifier vs clarifier operation – how oil, water, and sludge separate and which ports each phase uses • Ring dam (gravity disc) function – how its diameter controls the position of the oil–water interface inside the bowl • Flow path at port N in the illustration – what phase (oil or water) should normally leave there in purifier service

💭 Think About

• Trace the normal flow path of oil, water, and sludge in purifier mode and decide which phase should be leaving at port N under correct operation • Think about what happens to the oil–water interface inside the bowl if the ring dam opening is made larger or smaller – which way does the interface move? • Ask yourself: in clarifier mode, is there a water discharge at all, or is only one liquid phase removed?

✅ Before You Answer

• Confirm from the illustration which outlet is intended for oil discharge and which is for water discharge • Determine how changing ring dam diameter changes the back pressure on the light phase and the height of the interface in the bowl • Verify whether a clarifier (no water seal) would allow oil to exit from the same port as the water in a purifier, or if that port would be inactive