OVERVIEW OF ELECTRONIC EXPANSION VALVES

OVERVIEW OF ELECTRONIC EXPANSION VALVES

  • Catalog No.： On standard products, specify the Catalog No. only.
  • Port Size： The inner diameter of the valve.
  • Capacity： Nominal capacity under standard operating conditions.
  • Connection (Copper Tube Solder) ：
    ・ODF (Outside Diameter Female)： "Connection size" is the outside diameter of the piping to be connected. Insert the piping into the connection tube of the valve and braze connection.
    ・ODM (Outside Diameter Male)： "Connection size" is the outside diameter of the valve connection tube. Cover the pipe, such as an expanded pipe, with the connection tube of the valve and braze connection.
    ・OD (Outer Diameter) : Outer diameter of the connection.
    ・ID (Inner Diameter) : Inner diameter of the connection.
  • Operating Pressure Differential (O.P.D)： The pressure difference between the inlet and outlet sides of the valve is within this range, the valve will open and close reliably.
  • Max. Working Pressure： The maximum usable pressure at which the valve will function without any problems under normal operating conditions.
  • Fluid Temperature： The temperature range of fluid that can flow inside the valve.
  • Energizing Ratio (Duty Cycle)： The proportion of energized time in a cycle, where one cycle is the sum of the energized and the unenergized time.
  • Pressure Indication： Gauge pressure
  • Condensing Temperature (CT)： The highest temperature of the liquid condition of refrigerant in the refrigerant cycle.
    (Temperature of saturated refrigerant liquid at the expansion valve inlet.)
  • Evaporating Temperature (ET)： The temperature at mixture condition of refrigerant gas and liquid to cool water or air load, etc.
    (Temperature of saturated refrigerant vapor at the expansion valve outlet.)
  • Subcooling (SC)： The degree of temperature reduction, without changes of pressure, against the pressure equivalent to the refrigerant liquid temperature.
    It is usually necessary to consider subcooling of approx. 1 to 3℃.
    (Difference between the temperature at the expansion valve inlet and the temperature equivalent to the refrigerant pressure.)
  • Superheat (SH)： The degree of temperature increase, without changes of pressure, against the pressure equivalent to the refrigerant gas temperature.
    (Difference between the temperature at the evaporator outlet and temperature equivalent to the evaporating pressure.)