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What is the expansion valve in HVAC & How it
works ????????????
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Answer Posted / vishal bagal
Expansion valve is the device install before Evaporator in let to maintain constant degree of super heat. The mass flow rate through this valve depends upon the pressure difference between condenser and Evaporator. Expansion valve is used to maintain liquid flow in Evaporator in such way that flow rate will match the amount of liquid being boiled off in the Evaporator.
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