The water seal in a centrifuge, operating at normal speed, prevents the lube oil from discharging from the water outlet. Another function of the seal is to __________.
• Centrifuge bowl operation – how lube oil and water separate in a rotating bowl • Water seal purpose – why a water ring or water seal is used near the water outlet in a purifier/clarifier • Flow paths inside the centrifuge – where oil exits vs where separated water exits
• Think about what would physically happen inside the bowl if there were no water seal at the water outlet while operating at normal speed. • Ask yourself: besides blocking oil from leaving through the water outlet, what else must the seal water allow or control so that separation and discharge can continue? • Consider which choice describes a realistic hydraulic/flow function in a separator, rather than a chemical or temperature effect.
• Eliminate any option that suggests creating emulsions between oil and water – does a separator aim to mix or to separate? • Check whether the option you’re considering actually relates to the movement and discharge path of separated water from the bowl. • Verify that your chosen option supports the basic separation process (oil one way, water another), not cooling, heating, or chemical treatment.
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