Piston vs. TXV Metering Devices
Piston vs. TXV Metering Devices
Oct 10, 2022
hvacrschool.com
This detailed diagram illustrates the internal structure and function of a thermostatic expansion valve (TXV), a key metering device in refrigeration and air conditioning systems. The valve controls refrigerant flow from the high-pressure liquid line (from the condenser) to the low-pressure expansion line leading to the evaporator, where the refrigerant changes into a boiling liquid/vapor mixture. The TXV comprises a body, piston (orifice), retainer, and flare nut for assembly. The thermostatic
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