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Someone please correct me if I am wrong, but ZP is in relation to the thermal expansion valve. This valve limits pressure and flow through the evaporator. Sporlan uses SZ and SZP to designate the thermostatic charge and is related to refrigerant r404a.

Can anyone explain what the S is in relation to?

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Rick Bishop

Lvl 2
3y ago
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Wiki User

11y ago

A freezer valve that limits the pressure to the compressor.

Z for "Freezer" P for "Pressure limiting"

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Q: What does ZP stands for on a Sporlan TEV?
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