Thermostatic Expansion Valve RFKA Series

ref. Thermostatic Expansion Valve

RFKA series thermostatic expansion valves are used to adjust mass flow of refrigerant into the evaporator while controlling the refrigerant´s superheat 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.



Air conditioning Commercial Refrigeration Heat Pump

General characteristics

ModelPart numberConnection type in/out/extTemp Range [c]MOP [C]Outlet size flare [inch]Outlet size solder [mm]Refrigerant
RFKA02-5.2-24RFK-24007Flare / flare-40 to + 10-1/2-R407C
RFKA02E-5.2-20RFK-24008Flare / flare / flare-40 to + 10-1/2-R407C
RFKA02-5.2-27RFK-24009Flare / solder-40 to + 10--12R407C
RFKA02E-5.2-28RFK-24010Flare / solder / solder-40 to + 10--12R407C
RFKA02-5.2-32RFK-24011Flare / solder-40 to + 10-1/2-R407C
RFKA02E-5.2-18RFK-24012Flare / solder / solder-40 to + 10-1/2-R407C
RFKA03-3.4-21RFK-24013Flare / flare-40 to + 10-1/2-R407C
RFKA03E-3.4-15RFK-24014Flare / flare / flare-40 to + 10-1/2-R407C
RFKA03-3.4-03RFK-24015Flare / solder-40 to + 10--12R404A/R507
RFKA03E-3.4-02RFK-24016Flare / solder / solder-40 to + 10--12R404A/R508
RFKA03-3.4--09RFK-24017Flare / solder-40 to + 10-1/2-R404A/R509
RFKA03E-3.4-10RFK-24018Flare / solder / solder-40 to + 10-1/2-R404A/R510
RFKA04-4.0-23RFK-24019Flare / flare-40 to + 10-1/2-R404A/R511
RFKA04E-4.0-19RFK-24020Flare / flare / flare-40 to + 10-1/2-R404A/R512
RFKA04-4.0-29RFK-24021Flare / solder-40 to + 10--12R134a
RFKA04E-4.0-17RFK-24022Flare / solder / solder-40 to + 10--12R134a
RFKA04-4.0-30RFK-24023Flare / solder-40 to + 10-1/2-R134a
RFKA04E-4.0-31RFK-24024Flare / solder / solder-40 to + 10-1/2-R134a

Features

  • 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 superheat adjustment

General specifications

  • Applicable for all common HCFC and HFC refrigerants such as: R22, R134a, R404A, R407C, R410A, R507
  • Applicable medium temperature TS min/max: -40°C (-40°F)/+70°C (158°F)
  • Applicable ambient temperature: -35°C (-31°F) to +55°C (131°F)
  • Relative humidity: 0-100%RH
  • Maximum working pressure: 3.5MPa
  • Certifications: UL/CSA and PED Declaration

Technical Parameters

  • RFKA series angle shape valve
  • Inlet 3/8" flare connection
  • Capillary tube length 1,5m
  • Equalization port:
    • RFKA flare/flare type with 1/4" flare connection
    • RFKA flare/solder type with 6mm solder connection
Refrigerant Model Part number Connection type Temp. Range MOP Outlet size
In / Out / Ext. [°C] [°C] flare solder
[inch] [mm]
R22 RFKA01-4.8-22 RFK-24001 flare / flare -40 to +10 -- 1/2
RFKA01E-4.8-13 RFK-24002 flare / flare / flare -40 to +10 -- 1/2
RFKA01-4.8-26 RFK-24003 flare / solder -40 to +10 -- 12
RFKA01E-4.8-06 RFK-24004 flare / solder / solder -40 to +10 -- 12
RFKA01-4.8-07 RFK-24005 flare / solder -40 to +10 -- 1/2
RFKA01E-4.8-08 RFK-24006 flare / solder / solder -40 to +10 -- 1/2
R407C RFKA02-5.2-24 RFK-24007 flare / flare -40 to +10 -- 1/2
RFKA02E-5.2-20 RFK-24008 flare / flare / flare -40 to +10 -- 1/2
RFKA02-5.2-27 RFK-24009 flare / solder -40 to +10 -- 12
RFKA02E-5.2-28 RFK-24010 flare / solder / solder -40 to +10 -- 12
RFKA02-5.2-32 RFK-24011 flare / solder -40 to +10 -- 1/2
RFKA02E-5.2-18 RFK-24012 flare / solder / solder -40 to +10 -- 1/2
R404A
/
R507
RFKA03-3.4-21 RFK-24013 flare / flare -40 to +10 -- 1/2
RFKA03E-3.4-15 RFK-24014 flare / flare / flare -40 to +10 -- 1/2
RFKA03-3.4-03 RFK-24015 flare / solder -40 to +10 -- 12
RFKA03E-3.4-02 RFK-24016 flare / solder / solder -40 to +10 -- 12
RFKA03-3.4--09 RFK-24017 flare / solder -40 to +10 -- 1/2
RFKA03E-3.4-10 RFK-24018 flare / solder / solder -40 to +10 -- 1/2
R134a RFKA04-4.0-23 RFK-24019 flare / flare -40 to +10 -- 1/2
RFKA04E-4.0-19 RFK-24020 flare / flare / flare -40 to +10 -- 1/2
RFKA04-4.0-29 RFK-24021 flare / solder -40 to +10 -- 12
RFKA04E-4.0-17 RFK-24022 flare / solder / solder -40 to +10 -- 12
RFKA04-4.0-30 RFK-24023 flare / solder -40 to +10 -- 1/2
RFKA04E-4.0-31 RFK-24024 flare / solder / solder -40 to +10 -- 1/2
Note: Valves with MOP and with different range of t_ev for all refrigerants on request.

Nominal Capacity

No. Nominal Capacity in kW Valve orifice Model Valve orifice Part number
R22 R407C R404A / R507C R134a
0X 0,5 0,5 0,35 0,33 RFKA-023-0X RFK-24036
0 1,1 1,1 0,7 0,68 RFKA-023-00 RFK-24037
1 2,5 2,7 1,7 1,6 RFKA-023-01 RFK-24038
2 3,5 3,9 2,4 2,2 RFKA-023-02 RFK-24039
3 5,6 6,3 3,9 3,5 RFKA-023-03 RFK-24040
4 8,1 8,8 5,6 4,9 RFKA-023-04 RFK-24041
5 10,6 11,3 7,4 6,7 RFKA-023-05 RFK-24042
6 16,9 18,3 12 10,6 RFKA-023-06 RFK-24043

Note?Nominal capacity at t_ev = 5°C, t_c = 38°C, operating superheat 4K and subcooling 4K.

Dimensions

Thermal Expansion Valve RFKA Series . Dimensions

Inlet AOutlet BExternal Equalization C
ThreadThreadSolder ODFThreadSolder ODF
[inch][inch][mm][inch][inch][mm][inch]
3/8 1/2     1/4    
  12     6  
    1/2     1/4

Note: Version with Solder ODF in inch sizes for Outlet B and for External Equalization C on request.