No.4 ORIFICE EXPANSION VALVE For Thermostatic Expansion Valve RFKA



No.4 ORIFICE EXPANSION VALVE For Thermostatic Expansion Valve RFKA

 At OzSupply Australia we sell the Orifice Valve 4 for the Thermostatic Expansion Valves on series RFKA. RFKA series thermostatic expansion valves are used to adjust mass flow of refrigerant into the evaporator while controlling the refrigerant´s super-heat at the outlet of the evaporator. They can be used for various refrigerants under all working conditions. Possible applications are refrigeration systems like freezers, ice makers, dehumidifiers as well as air conditioners and heat pumps at various evaporation temperature ranges.


General specifications:

  • Applicable for all common HCFC and HFC refrigerants such as: R22, R134a, R404A, R407C, R410A, R507
  • Applicable medium temperature: -40C +70C
  • Applicable ambient temperature: -35C +55C
  • Relative humidity: 0 - 100% RH
  • Maximum working pressure: 3.5MPa
  • Certifications: PED


  • Thermal bulb utilizes cross charge technology, providing equal superheat degree over the whole evaporation temperature range
  • Thermal bulb utilizes cross injection technology, and the whole vaporizing temperature range share the same superheat degree
  • Valves with MOP function can be provided to prevent damages to compressor motor caused by excessive evaporation pressure
  • Wide vaporizing temperature range
  • Stable performance of super-heat adjustment

No.  Available:

  • Orifice No1
  • Orifice No2
  • Orifice No3
  • Orifice No4
  • Orifice No5