Which of the following illustrated thermal...

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Question 1 of 205eccef9dbacbc34ba4d45fb7

Which of the following illustrated thermal expansion valves would be appropriate to use on an evaporator coil with an 8 psi pressure drop, where externally adjustable superheat and a replaceable power element are both desired? See illustration GS-RA-06.

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🔍 Key Concepts

• Externally equalized vs. internally equalized thermal expansion valves and when an external equalizer is needed (pressure drop across the evaporator, here 8 psi). • How externally adjustable superheat is shown in a valve illustration (look for an adjustment stem/screw on the power head). • Visual features that indicate a replaceable power element/head on a TXV (separate top assembly that can be unscrewed from the valve body).

💭 Think About

• Which illustration clearly shows an external equalizer connection coming off the valve body, suitable for an evaporator with an 8 psi pressure drop? • On which valve can you see a distinct means of adjusting superheat at the top, and does that top section look like a separate, removable power element? • Eliminate any valves that appear internally equalized only, have no external adjustment, or have a permanently attached power head.

✅ Before You Answer

• Verify which valves show an external equalizer line connection versus only an inlet and outlet. • Check which valves show a visible adjustment feature on the top of the power head for superheat setting. • Confirm that the selected valve’s power head looks separate and removable from the main valve body (threaded joint or clamp line).

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