what is a txv metering device
TXV or Thermostatic Expansion Valve are used in air conditioners and heat pumps to meter refrigerant. The TXV or Thermostatic Expansion Valve is preferred over other refrigeration metering devices because it only allows a specified amount of refrigerant to flow based on demand. Any type of refrigeration metering device creates a pressure drop in the refrigerant and with a pressure drop of the refrigerant a temperature drop also occurs.