🔍 Key Concepts

• Silica gel core dehydrators and how they remove moisture from liquid refrigerant • Flow direction in a vertical liquid line and its effect on contact time with the dehydrator core • Why manufacturers specify a certain inlet and outlet orientation for proper drainage and use of the full core

💭 Think About

• Think about how liquid refrigerant should move through a vertical canister so that it passes over as much of the silica gel surface as possible before exiting. • Consider whether liquid entering at the top or bottom will help avoid trapping gas at the outlet and ensure the core does not stay partially dry or partially flooded. • Ask yourself: in a vertical filter-drier, which flow direction best ensures that any separated vapor can rise away from the outlet while liquid continues through the dehydrator?

✅ Before You Answer

• Check which options specifically mention a vertical installation in the liquid line rather than horizontal or special drying agents. • Verify which flow direction (top-to-bottom vs bottom-to-top) would maximize contact time between liquid refrigerant and the silica gel core in a vertical cylinder. • Make sure the choice you pick matches common manufacturer installation practices for core-type liquid-line dehydrators in halocarbon systems.