🔍 Key Concepts

• Flow path of steam when supplied through OR4 and how it affects HX5 and downstream equipment • Location and purpose of strainer MD9 in relation to pump PU4 and salinity cell SC5 • Effect of a restricted suction or discharge line on a centrifugal pump and overall distillate production

💭 Think About

• Trace the line that contains MD9: What component is it protecting, and is it on the suction or discharge side of that component? • If MD9 becomes fouled, what happens to pressure and flow on each side of the strainer, and how would that influence the pump operation and distillate output? • When operating on steam through OR4, which heat exchangers are providing heat for distillation, and how would reduced flow past MD9 change the amount of distillate that can be collected and pumped away?

✅ Before You Answer

• Verify which equipment (e.g., PU4, HX5, SC5) is directly upstream and downstream of MD9 on the schematic • Confirm whether CV3 is in the same flow path as MD9 or in a different part of the system • Check if the line with MD9 is essential to carry away produced distillate when steaming through OR4, or if there is an alternate path that would make that line unnecessary