🔍 Key Concepts

• Differences between sealed filter-driers and replaceable core (take-apart) shells in refrigeration systems • How housing construction (bolted flanges vs. welded/solid shells) affects serviceability • What the label wording and service connections imply about whether the desiccant can be changed

💭 Think About

• Look closely at how each device in the illustration is built: which one could practically be opened without cutting it out of the line? • Which units appear to be fully sealed, meant to be replaced as a whole, and which look like a permanent shell that stays in the line while only the inside element is changed? • What clues on the nameplate or body (shape, flanges, bolts, wording) suggest a take-apart or replaceable core design?

✅ Before You Answer

• Identify which option has a bolted or flanged cover that could be removed for internal access • Check which units have smooth welded shells with no mechanical joints, indicating they are throwaway types • Verify any label words that hint at a take-apart shell or replaceable core before choosing your answer