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Internal balance screw type thermodynamic expansion valve RFA Series

Internal balance screw type thermodynamic expansion valve RFA Series 1

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Models & Details for “ Internal balance screw type thermodynamic expansion valve”

RFA Series thermodynamic expansion valve,Model: RFN0.5A

Installation size:

Air inlet: Φ10mm ;

Air outlet: Φ12mm

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 0.81kw (kW);  0.23TR (cold ton); 700Kcal/h (kcal/hour)

R22 (R407c): 1.28kw (kW); 0.36TR (cold ton); 1100Kcal/h (kcal/hour)

HFC134a: 1.01kw (kW); 0.29TR (cold ton); 870Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN0.8A

Installation size:

Air inlet: Φ10mm  ; Air outlet: Φ12mm

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 1.16kw (kW); 0.33TR (cold ton);   1000Kcal/h (kcal/hour)

R22 (R407c): 1.86kw (kW); 0.53TR (cold ton); 1600Kcal/h (kcal/hour)

HFC134a: 1.45kw (kW); 0.41TR (cold ton); 1250Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN1.0A

Installation size:

      Air inlet: Φ10mm;  Air outlet: Φ12mm

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 1.40kw (kW);  0.40TR (cold ton); 1200Kcal/h (kcal/hour)

R22 (R407c): 2.33kw (kW); 0.66TR (cold ton); 2000Kcal/h (kcal/hour)

HFC134a: 1.75kw (kW);  0.50TR (cold ton); 1500Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN1.2A

Installation size:

Air inlet: Φ10mm ; Air outlet: Φ12mm

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 1.74kw (kW); 0.49TR (cold ton); 1500Kcal/h (kcal/hour)

R22 (R407c): 2.83kw (kW); 0.80TR (cold ton); 2500Kcal/h (kcal/hour)

HFC134a: 2.18kw (kW); 0.62TR (cold ton); 1870Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN1.5A

Installation size:

Air inlet: Φ10mm ; Air outlet: Φ12

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 2.21kw (kW); 0.63TR (cold ton); 1900Kcal/h (kcal/hour)

R22 (R407c): 3.60kw (kW); 1.02TR (cold ton); 3100Kcal/h (kcal/hour)

HFC134a: 2.76kw (kW); 0.78TR (cold ton); 2370Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN2.0A

Installation size:

Air inlet: Φ10mm ; Air outlet: Φ12

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 2.91kw (kW); 0.83TR (cold ton); 2500Kcal/h (kcal/hour)

R22 (R407c): 4.77kw (kW);1.36TR (cold ton);  4100Kcal/h (kcal/hour)

HFC134a: 3.64kw (kW);1.04TR (cold ton); 3130Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN3.0A

Installation size:

Air inlet: Φ10mm ; Air outlet: Φ12mm

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 5.81kw (kW);  1.65TR (cold ton); 5000Kcal/h (kcal/hour)

R22 (R407c): 10.00kw (kW); 2.84TR (cold ton); 8600Kcal/h (kcal/hour)

HFC134a: 7.26kw (kW);2.06TR (cold ton); 6250Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN4.0A

Installation size:

Air inlet: Φ10mm ;  Air outlet: Φ16

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 10.47kw (kW);2.98TR (cold ton);9000Kcal/h (kcal/hour)

R22 (R407c): 17.44kw (kW);  4.96TR (cold ton); 15000Kcal/h (kcal/hour)

HFC134a: 13.09kw (kW);3.72TR (cold ton);11250Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN5.0A

Installation size:

Air inlet: Φ10mm; Air outlet: Φ16mm

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 13.14kw (kW); 3.74TR (cold ton);11300Kcal/h (kcal/hour)

R22 (R407c): 21.51kw (kW); 6.12TR (cold ton); 18500Kcal/h (kcal/hour)

HFC134a: 16.43kw (kW);  4.67TR (cold ton); 14130Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN7.0A

Installation size:

      Air inlet: Φ16mm; Air outlet: Φ16mm

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 18.37kw (kW);  5.22TR (cold ton); 15800Kcal/h (kcal/hour)

R22 (R407c): 30.23kw (kW); 8.60TR (cold ton); 26000Kcal/h (kcal/hour)

HFC134a: 22.96kw (kW); 6.35TR (cold ton);  19750Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN9.0A

Installation size:

Air inlet: Φ16mm; Air outlet: Φ16mm

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 31.40kw (kW);  8.93TR (cold ton);27000Kcal/h (kcal/hour)

R22 (R407c): 53.49kw (kW); 15.21TR (cold ton);46000Kcal/h (kcal/hour)

HFC134a: 39.25kw (kW);  11.16TR (cold ton); 33750Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN11.0A

Installation size:

      Air inlet: Φ19mm;  Air outlet: Φ19mm

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 45.35kw (kW); 12.90TR (cold ton);39000Kcal/h (kcal/hour)

R22 (R407c): 69.77kw (kW); 19.80TR (cold ton);60000Kcal/h (kcal/hour)

     HFC134a: 57.20kw (kW); 16.25TR (cold ton);  49000Kcal/h (kcal/hour)


RFA Series thermodynamic expansion valve,Model: RFN13.0A

Installation size:

Air inlet: Φ19mm ; Air outlet: Φ19mm

Nominal cooling capacity: (based on evaporating temperature +5 ° C, condensing temperature +38 ° C working condition)

R12: 98.84kw (kW); 28.07TR (cold ton);85000Kcal/h (kcal/hour)

R22 (R407c): 157.00kw (kW); 44.60TR (cold tons);135000Kcal/h (kcal/hour)

HFC134a: 124.5kw (kW);35.40TR (cold ton);107000Kcal/h (kcal/hour)

Buying guide to “Internal balance screw type thermodynamic expansion valve ”
  • The item  is available for retail and wholesale;
  • The place of origin is in China,when you buy one or two,please consider freight(by air or by sea) into the cost;
  • Accept bulk order with Container delivery;
  • Please contact us to email:  [email protected]
General Knowledge on “Internal balance screw type thermodynamic expansion valve ”

The internal balance type thermal expansion valve is mainly composed of a valve body, a valve seat, a bonnet, a valve needle, an adjusting socket, an adjusting rod, a packing, a temperature sensing bag, a capillary tube and an elastic metal diaphragm,. The internal balanced expansion valve is installed on the inlet pipe of the evaporator, and the temperature sensing package is placed on the outlet pipe of the evaporator.

The temperature sensor is filled with refrigerant (generally the same as the working medium used in the system). When the temperature it feels changes, the pressure in the temperature sensing bag changes accordingly. Its pressure acts on the elastic metal diaphragm. The upper part of the metal diaphragm is affected by the working medium pressure in the temperature sensing bag, and the lower part is affected by the refrigerant pressure and spring. The opening of the valve hole is controlled to adjust the liquid supply of the evaporator.

When the amount of liquid entering the evaporator is less than the demand of the load of the evaporator, the superheat at the outlet of the evaporator increases, the pressure above the diaphragm is greater than the pressure below, so that the diaphragm moves down, push the regulating rod to compress the spring, open the needle valve, make the valve hole open, then the liquid supply increases.

When the superheat degree of the steam at the outlet of the evaporator decreases, the pressure on the diaphragm is less than the pressure below, and the diaphragm moves up, so that the valve hole is closed and the liquid supply quantity decreases. As the opening of the thermal expansion valve is based on the force balance, when the superheat is reduced to a certain value, the valve will close and stop the liquid supply. Therefore, in the operation process of refrigeration system, the thermal expansion valve can automatically adjust the liquid supply according to the change of heat load of evaporator, so that the system can run smoothly.

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