Author Question: What is the advantage of balanced port TEVs? A) Balanced port valves can retain good control over ... (Read 93 times)

bobbie · **on:** Jul 26, 2018

What is the advantage of balanced port TEVs?

A) Balanced port valves can retain good control over a wider range of operating conditions.
B) Balanced port valves can be converted from externally equalized valves to internally equalized simply by capping the equalizer port.
C) Balanced port valves equalize on the off cycle, making it easier for the compressor to start.
D) Balanced port valves can be installed upside down.

Question 2

Why do standard design thermostatic expansion valves need a minimum pressure drop to operate correctly?

A) The pressure difference across the pin acts as an opening force.
B) The internal adjustment springs have a minimum required torsion.
C) To insure that the pin seats tightly during operation
D) The bulb will not sense temperatures below 100 psig.