Thermostatic Expansion Valve Series RFKH

Thermostatic Expansion Valve Thermostatic Expansion Valve Series RFKH

RFKH 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. Typical applications are refrigeration systems like freezers, ice makers, dehumidifiers as well as air conditioners and heat pumps at various evaporation temperature ranges.

Technical parameters

  • Features
    • Stainless steel capillary and sensing bulb
    • Exchangeable valve orifice, easy to stock holding, convenient for capacity match and repair
    • Thermal bulb utilizes cross charge technology, providing consistent superheat degree over the whole evaporation temperature range
    • Valves with MOP function can be provided to assure reliable compressor operation
    • Applicable in a wide evaporation temperature range
    • Reliable and consistent performance of superheat control
  • General specifications
    • Applicable for all common HCFC, HFC, HFO refrigerants such as: R22, R407C, R404A, R507A, R134a, R404A, R410A, R407A, R407F, R448A, R449A, R452A, R450A, R513A
    • Ambient temperature min./max.: -35°C / +55°C
    • Medium temperature TS min./max.: -40°C / +70°C
    • Max. operating pressure PS: 4.6 MPa (46 bar)
    • Installation position:
      • Preferably valve head upwards
      • Flow direction from inlet A to outlet B
    • Certifications: UL/CSA and PED declaration
  • Technical Parameters
    • RFKH series angle shape valve
    • Inlet 3/8" flare connection
    • Capillary tube length 1,5m
    • Equalization port:
      • RFKH flare/flare type with ¼” flare connection
      • RFKH flare/solder type with ¼” or 6mm solder connection

     

    Position Number Model Designation Legend
    1 Product Code Product Series
    RFKH Thermostatic Expansion Valve
    2 Refrigerant Description
    01 R22
    02 R407C
    03 R404A / R507A
    04 R134a
    05 R410A
    07 R407A / R407F
    08 R448A / R449A
    10 R450A
    11 R452A
    14 R513A
    3 Pressure Equalization Description
    E External pressure equalization
    Omitted Internal pressure equalization
    Miscellaneous Description
    xxxx Digits for additional information

     

     

    Tab. A : Models with Range N : Temperature Range from -40°C to +10°C [ without MOP ]

    Ref. Model Valve Body Part Number1 & 4) Connection Type Inlet ØA Outlet ØB Ext. ØC
    In / Out / Ext. Pressure Equal. Flare Flare Solder Flare Solder Solder
    [inch] [inch] [mm] [inch] [inch] [inch] [mm]
    R22 RFKH 01-6.0-22 10201002502 flare / flare 3/8 1/2 - - - - -
    RFKH01E-6.0-13 10201002402 flare / flare / flare 1/2 - - 1/4 - -
    RFKH01-6.0-26 10201002602 flare / solder - 12 - - - -
    RFKH01E-6.0-06 10201002102 flare / solder / solder - 12 - - - 6
    RFKH01-6.0-07 10201002202 flare / solder - - 1/2 - - -
    RFKH01E-6.0-08 10201002302 flare / solder / solder - - 1/2 - 1/4 -
    R407C RFKH02-6.3-24 10201002902 flare / flare 3/8 1/2 - - - - -
    RFKH02E-6.3-20 10201002802 flare / flare / flare 1/2 - - 1/4 - -
    RFKH02-6.3-27 10201003002 flare / solder - 12 - - - -
    RFKH02E-6.3-28 10201003102 flare / solder / solder - 12 - - - 6
    RFKH02-6.3-32 10201003202 flare / solder - - 1/2 - - -
    RFKH02E-6.3-18 10201002702 flare / solder / solder - - 1/2 - 1/4 -
    R404A / R507A RFKH03-4.8-21 10201003702 flare / flare 3/8 1/2 - - - - -
    RFKH03E-4.8-15 10201003802 flare / flare / flare 1/2 - - 1/4 - -
    RFKH03-4.8-03 10201003402 flare / solder - 12 - - - -
    RFKH03E-4.8-02 10201003302 flare / solder / solder - 12 - - - 6
    RFKH03-4.8-09 10201003502 flare / solder - - 1/2 - - -
    RFKH03E-4.8-10 10201003602 flare / solder / solder - - 1/2 - 1/4 -
    R134a RFKH04-2.9-23 10201004102 flare / flare 3/8 1/2 - - - - -
    RFKH04E-2.9-19 10201004002 flare / flare / flare 1/2 - - 1/4 - -
    RFKH04-2.9-29 10201004202 flare / solder - 12 - - - -
    RFKH04E-2.9-17 10201003902 flare / solder / solder - 12 - - - 6
    RFKH04-2.9-30 10201004302 flare / solder - - 1/2 - - -
    RFKH04E-2.9-31 10201004402 flare / solder / solder - - 1/2 - - 1/4
    R410A RFKH05-7.6-66 10201005702 flare / flare 3/8 1/2 - - - - -
    RFKH05E-7.6-33 10201005202 flare / flare / flare 1/2 - - 1/4 - -
    RFKH05-7.6-37 10201005602 flare / solder - 12 - - - -
    RFKH05E-7.6-36 10201005502 flare / solder / solder - 12 - - - 6
    RFKH05-7.6-35 10201005402 flare / solder - - 1/2 - - -
    RFKH05E-7.6-34 10201005302 flare / solder / solder - - 1/2 - - 1/4
    R407A / R407F RFKH07-6.0-43 10201004802 flare / flare 3/8 1/2 - - - - -
    RFKH07E-6.0-42 10201004702 flare / flare / flare 1/2 - - 1/4 - -
    RFKH07-6.0-44 10201004902 flare / solder - 12 - - - -
    RFKH07E-6.0-41 10201004602 flare / solder / solder - 12 - - - 6
    RFKH07-6.0-45 10201005002 flare / solder - - 1/2 - - -
    RFKH07E-6.0-46 10201005102 flare / solder / solder - - 1/2 - - 1/4
    R448A / R449A RFKH08-6.1-49 10201012802 flare / flare 3/8 1/2 - - - - -
    RFKH08E-6.1-48 10201012402 flare / flare / flare 1/2 - - 1/4 - -
    RFKH08-6.1-50 10201013302 flare / solder - 12 - - - -
    RFKH08E-6.1-47 10201012302 flare / solder / solder - 12 - - - 6
    RFKH08-6.1-51 10201012502 flare / solder - - 1/2 - - -
    RFKH08E-6.1-52 10201012602 flare / solder / solder - - 1/2 - 1/4 -
    R450A RFKH10-2.8-61 10201016102 flare / flare 3/8 1/2 - - - - -
    RFKH10E-2.8-60 10201016002 flare / flare / flare 1/2 - - 1/4 - -
    RFKH10-2.8-72 10201016202 flare / solder - 12 - - - -
    RFKH10E-2.8-59 10201015902 flare / solder / solder - 12 - - - 6
    RFKH10-2.8-63 10201016302 flare / solder - - 1/2 - - -
    RFKH10E-2.8-64 10201016402 flare / solder / solder - - 1/2 - 1/4 -
    R452A RFKH11-4.5-55 10201013602 flare / flare 3/8 1/2 - - - - -
    RFKH11E-4.5-54 10201013502 flare / flare / flare 1/2 - - 1/4 - -
    RFKH11-4.5-56 10201013702 flare / solder - 12 - - - -
    RFKH11E-4.5-53 10201013402 flare / solder / solder - 12 - - - 6
    RFKH11-4.5-57 10201013802 flare / solder - - 1/2 - - -
    RFKH11E-4.5-58 10201013902 flare / solder / solder - - 1/2 - 1/4 -
    R513A RFKH14-2.7-68 10201016802 flare / flare 3/8 1/2 - - - - -
    RFKH14E-2.7-67 10201016702 flare / flare / flare 1/2 - - 1/4 - -
    RFKH14-2.7-70 10201016902 flare / solder - 12 - - - -
    RFKH14E-2.7-65 10201016502 flare / solder / solder - 12 - - - 6
    RFKH14-2.7-71 10201017002 flare / solder - - 1/2 - - -
    RFKH14E-2.7-76 10201017102 flare / solder / solder - - 1/2 - 1/4 -

     

     

    Tab. B : Models with Range N : Temperature Range from -40°C to +10°C [ with MOP = +15°C ]

    Ref. Model Valve Body Part Number1 & 4) Connection Type Inlet ØA Outlet ØB Ext. ØC
    In / Out / Ext. Pressure Equal. Flare Flare Solder Flare Solder Solder
    [inch] [inch] [mm] [inch] [inch] [inch] [mm]
    R22 RFKH 01-6.0-205 10201006702 flare / flare 3/8 1/2 - - - - -
    RFKH01E-6.0-204 10201006602 flare / flare / flare 1/2 - - 1/4 - -
    RFKH01-6.0-206 10201008102 flare / solder - 12 - - - -
    RFKH01E-6.0-201 10201006302 flare / solder / solder - 12 - - - 6
    RFKH01-6.0-202 10201006402 flare / solder - - 1/2 - - -
    RFKH01E-6.0-203 10201006502 flare / solder / solder - - 1/2 - 1/4 -
    R407C RFKH02-6.3-209 10201007602 flare / flare 3/8 1/2 - - - - -
    RFKH02E-6.3-208 10201007502 flare / flare / flare 1/2 - - 1/4 - -
    RFKH02-6.3-210 10201007702 flare / solder - 12 - - - -
    RFKH02E-6.3-211 10201007802 flare / solder / solder - 12 - - - 6
    RFKH02-6.3-212 10201007902 flare / solder - - 1/2 - - -
    RFKH02E-6.3-207 10201007402 flare / solder / solder - - 1/2 - 1/4 -
    R404A / R507A RFKH03-4.8-218 10201008702 flare / flare 3/8 1/2 - - - - -
    RFKH03E-4.8-216 10201008502 flare / flare / flare 1/2 - - 1/4 - -
    RFKH03-4.8-214 10201008302 flare / solder - 12 - - - -
    RFKH03E-4.8-213 10201008202 flare / solder / solder - 12 - - - 6
    RFKH03-4.8-215 10201008402 flare / solder - - 1/2 - - -
    RFKH03E-4.8-217 10201008602 flare / solder / solder - - 1/2 - 1/4 -
    R134a RFKH04-2.9-221 10201009502 flare / flare 3/8 1/2 - - - - -
    RFKH04E-2.9-220 10201009402 flare / flare / flare 1/2 - - 1/4 - -
    RFKH04-2.9-223 10201009702 flare / solder - 12 - - - -
    RFKH04E-2.9-219 10201009302 flare / solder / solder - 12 - - - 6
    RFKH04-2.9-222 10201009602 flare / solder - - 1/2 - - -
    RFKH04E-2.9-224 10201009802 flare / solder / solder - - 1/2 - - 1/4
    R410A RFKH05-7.6-230 10201010402 flare / flare 3/8 1/2 - - - - -
    RFKH05E-7.6-225 10201009902 flare / flare / flare 1/2 - - 1/4 - -
    RFKH05-7.6-229 10201010302 flare / solder - 12 - - - -
    RFKH05E-7.6-228 10201010202 flare / solder / solder - 12 - - - 6
    RFKH05-7.6-227 10201010102 flare / solder - - 1/2 - - -
    RFKH05E-7.6-226 10201010002 flare / solder / solder - - 1/2 - - 1/4
    R407A / R407F RFKH07-6.0-233 10201011302 flare / flare 3/8 1/2 - - - - -
    RFKH07E-6.0-232 10201011202 flare / flare / flare 1/2 - - 1/4 - -
    RFKH07-6.0-234 10201011402 flare / solder - 12 - - - -
    RFKH07E-6.0-231 10201011102 flare / solder / solder - 12 - - - 6
    RFKH07-6.0-235 10201011502 flare / solder - - 1/2 - - -
    RFKH07E-6.0-236 10201011602 flare / solder / solder - - 1/2 - - 1/4

     

     

    Tab. C : Models with Range NL : Temperature Range from -40°C to -15°C [ with MOP = -10°C ]

    Ref. Model Valve Body Part Number1 & 4) Connection Type Inlet ØA Outlet ØB Ext. ØC
    In / Out / Ext. Pressure Equal. Flare Flare Solder Flare Solder Solder
    [inch] [inch] [mm] [inch] [inch] [inch] [mm]
    R22 RFKH 01-6.0-305 10201007202 flare / flare 3/8 1/2 - - - - -
    RFKH01E-6.0-304 10201007102 flare / flare / flare 1/2 - - 1/4 - -
    RFKH01-6.0-306 10201007302 flare / solder - 12 - - - -
    RFKH01E-6.0-301 10201006802 flare / solder / solder - 12 - - - 6
    RFKH01-6.0-302 10201006902 flare / solder - - 1/2 - - -
    RFKH01E-6.0-303 10201008002 flare / solder / solder - - 1/2 - 1/4 -
    R404A / R507A RFKH03-4.8-312 10201009202 flare / flare 3/8 1/2 - - - - -
    RFKH03E-4.8-311 10201009102 flare / flare / flare 1/2 - - 1/4 - -
    RFKH03-4.8-308 10201008902 flare / solder - 12 - - - -
    RFKH03E-4.8-307 10201008802 flare / solder / solder - 12 - - - 6
    RFKH03-4.8-309 10201009002 flare / solder - - 1/2 - - -
    RFKH03E-4.8-69 10201012202 flare / solder / solder - - 1/2 - 1/4 -
    R410A RFKH05-7.6-318 10201011002 flare / flare 3/8 1/2 - - - - -
    RFKH05E-7.6-313 10201010502 flare / flare / flare 1/2 - - 1/4 - -
    RFKH05-7.6-317 10201010902 flare / solder - 12 - - - -
    RFKH05E-7.6-316 10201010802 flare / solder / solder - 12 - - - 6
    RFKH05-7.6-315 10201010702 flare / solder - - 1/2 - - -
    RFKH05E-7.6-314 10201010602 flare / solder / solder - - 1/2 - - 1/4

    Note:

    • 1) Extent of delivery: valve body and bulb strap
    • 2) Different evaporation temperature range on request
    • 3) MOP function on request
    • 4) Part Number is referred to Multi Pack

     

     

    Tab. D : Models with Range B : Temperature Range from -60°C to -25°C [ without MOP ]

    Ref. Model Valve Body Part Number1 & 4) Connection Type Inlet ØA Outlet ØB Ext. ØC
    In / Out / Ext. Pressure Equal. Flare Flare Solder Flare Solder Solder
    [inch] [inch] [mm] [inch] [inch] [inch] [mm]
    R407A / R407F RFKH03-4.8-106 10201017902 flare / flare 3/8 1/2 - - - - -
    RFKH03E-4.8-105 10201017802 flare / flare / flare 1/2 - - 1/4 - -
    RFKH03-4.8-102 10201017502 flare / solder - 12 - - - -
    RFKH03E-4.8-101 10201017402 flare / solder / solder - 12 - - - 6
    RFKH03-4.8-103 10201017602 flare / solder - - 1/2 - - -
    RFKH03E-4.8-104 10201017702 flare / solder / solder - - 1/2 - 1/4 -

     

     

    Tab. E : Models with Range B : Temperature Range from -60°C to -25°C [ with MOP -20°C ]

    Ref. Model Valve Body Part Number1 & 4) Connection Type Inlet ØA Outlet ØB Ext. ØC
    In / Out / Ext. Pressure Equal. Flare Flare Solder Flare Solder Solder
    [inch] [inch] [mm] [inch] [inch] [inch] [mm]
    R404A / R507A RFKH03-4.8-406 10201015602 flare / flare 3/8 1/2 - - - - -
    RFKH03E-4.8-405 10201014402 flare / flare / flare 1/2 - - 1/4 - -
    RFKH03-4.8-402 10201015802 flare / solder - 12 - - - -
    RFKH03E-4.8-401 10201015302 flare / solder / solder - 12 - - - 6
    RFKH03-4.8-403 10201015402 flare / solder - - 1/2 - - -
    RFKH03E-4.8-404 10201015502 flare / solder / solder - - 1/2 - 1/4 -

    Note:

    • 1) Extent of delivery: valve body and bulb strap
    • 2) Different evaporation temperature range on request
    • 3) MOP function on request
    • 4) Part Number is referred to Multi Pack
  • Dimensions

    Valve Body - Connection Type: flare/flare/flare

    Valve Body - Connection Type: flare/flare/flare

     

    Valve Body - Connection Type::flare/solder/solder

    Valve Body - Connection Type: flare/solder/solder

  • Models with MOP function

    RFKH valves can be selected with MOP (Max. Operating Pressure) function. MOP protects the compressor motor against excessive evaporating pressure during normal operation. R407AR407F Ambient temperature min./max.: -35°C / +55

     

    Refrigerant Range N Range NM Range NL Range B
    ( -40°C to +10°C) (-40°C to -5°C) (-40°C to -15°C) (-60°C to -25°C)
    MOP = +15°C MOP = 0°C MOP = -10°C MOP = -20°C
    R22 6,9 bar (abs.) - STD 4,1 bar (abs.) – O.R. 2,4 bar (abs.) - STD N.A.
    R407C 6,6 bar (abs.) - STD N.A. N.A. N.A.
    R404A / R507A 8,6 bar (abs.) - STD 5,2 bar (abs.) – O.R. 3,4 bar (abs.) - STD 3,0 bar (abs.) - STD
    R134a 3,8 bar (abs.) - STD 2,1 bar (abs.) – O.R. 1,0 bar (abs.) – O.R. N.A.
    R410A 11,4 bar (abs.) - STD 8,0 bar (abs.) – O.R. 4,8 bar (abs.) - STD N.A.
    R407A / R407F 6,9 bar (abs.) - STD N.A. N.A. N.A.
    R448A / R449A 7,5 bar (abs.) - O.R. 4,3 bar (abs.) – O.R. 2,7 bar (abs.) - O.R. 2,47 bar (abs.) - O.R.
    R450A 3,5 bar (abs.) - O.R. 1,7 bar (abs.) – O.R. 0,8 bar (abs.) - O.R. N.A.
    R452A 8,1 bar (abs.) - O.R. 4,8 bar (abs.) – O.R. 3,1 bar (abs.) - O.R. 2,76 bar (abs.) - O.R.
    R513A 4,3 bar (abs.) - O.R. 2,3 bar (abs.) – O.R. 0,9 bar (abs.) - O.R. N.A.

    Note:

    • STD : Standard product
    • O.R. : On Request
    • N.A. : Not Available
  • Accessories - Orifice

    Orifice Number Valve orifice Model Valve orifice Part number Nominal Capacity1) [ kW ]
    R22 R407C R404A R507A R134a R410A R407A R407F
    0X RFKH-023-0X 10202001702 1 1 0,7 0,69 1,3 1
    0 RFKH-023-00 10202001002 1,9 2,1 1,4 1,2 2,5 1,8
    1 RFKH-023-01 10202001102 3,8 4 2,8 2,1 5 3,7
    2 RFKH-023-02 10202001202 5,1 5,4 4 2,7 6,2 5,1
    3 RFKH-023-03 10202001302 8,6 9,2 6,8 4,4 11,2 8,6
    4 RFKH-023-04 10202001402 13,2 13,9 10,8 6,5 17 13,4
    5 RFKH-023-05 10202001502 18,1 18,5 14,1 8,6 21,3 17,6
    6 RFKH-023-06 10202001602 21,3 22,1 16,8 10,3 26,8 21,2

     

    Orifice Number Valve orifice Model Valve orifice Part number Nominal Capacity1) [ kW ]
    R448A R449A R450A R452A R513A
    0X RFKH-023-0X 10202001702 1,1 1 0,6 0,8 0,6
    0 RFKH-023-00 10202001002 2,1 2 1,1 1,5 1
    1 RFKH-023-01 10202001102 4 4 1,9 3 1,8
    2 RFKH-023-02 10202001202 5 4,9 2,3 3,7 2,2
    3 RFKH-023-03 10202001302 8,9 8,8 4,2 6,7 4
    4 RFKH-023-04 10202001402 13,6 13,4 6,3 10,1 6,1
    5 RFKH-023-05 10202001502 17 16,8 7,9 12,7 7,6
    6 RFKH-023-06 10202001602 21,4 21,1 9,9 16 9,6

    Note:

    • 1) Nominal working conditions:
      • • Condensing temperature 38°C; evaporating temperature +4,4°C; liquid temperature 37°C
    • 2) R407C data based on dew point conditions
    • 3) Nominal capacity based on
      • • Static Superheat (SS) 5K (for models without MOP) and 4K (for models with MOP)
      • • Opening Superheat(OS) 6K
  • Solder Adapters for RFKH Inlet A

    Model Part Number1) SAE Flare Ø e Solder Connection Ø d
    RFK-A04-038010 20200001602 3/8" 3/8"
    RFK-A04-038011 20201002502 10mm
    RFK-A04-038012 20201002602 1/4"
    RFK-A04-038013 20201002702 6mm

    Note:

    • 1) Copper pipe and flare nut are in the extent of delivery
  • Solder Adapters for RFKH External Pressure Equalization C

    Model Part Number1) SAE Flare Ø e Solder Connection Ø d
    RFKA-038-03 20201000502 1/4" 6mm
    RFKA-038-04 20201000602 1/4"

    Note:

    • 1) Copper pipe and flare nut are in the extent of delivery
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