Rather than design an infinite variety of thermostatic expansion valve sizes to accommodate different capacities for heat removal, some manufacturers use a few standard valve body sizes in conjunction with what other feature?
Official USCG Answer & Rule Citation
Correct Answer: Option B — internal needle valve orifices of various sizes to accommodate different heat removal capacities
Manufacturers standardize thermostatic expansion valve bodies and utilize interchangeable internal needle valve orifices of varying capacities to cover different heat removal requirements without redesigning entire valve assemblies.
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