The thermostatic expansion valve (TXV) is also known in the field simply as the expansion valve. It regulates the flow of refrigerant into the evaporator so as to keep the superheat at the evaporator outlet constant: the sensing bulb reads the temperature of the evaporator outlet pipe, and the valve opens and closes accordingly.
This category contains Danfoss TE, TN, TS and TEZ, Sanhua RFKA, RFKH and RFG, Honeywell and Sporlan thermostatic expansion valves, as well as the top and bottom bodies of the Danfoss modular system. Orifices are in a separate category.
How to Choose the Right Valve
- Refrigerant: The valve is set for a specific refrigerant (R134a, R404A, R407C, R410A, R22…); it is not used for another refrigerant.
- Internally / externally equalised: If the pressure drop across the evaporator is high or a distributor is used, an externally equalised valve is chosen.
- Connection: Flare or solder (ODF solder connection).
- Capacity and MOP: The valve/orifice size is selected according to the system capacity; in low-temperature applications a valve with MOP is preferred.
Brand: Sanhua
Model: 41.01.004
To precisely balance the amount of refrigerant flowing to the evaporator in refrigeration and air conditioning systems, the Sanhua RFKA1E-4.8-08 Thermostatic Expansion Valve delivers efficient and stable expansion performance thanks to its compatibility with R22 refrigerant. With its brass body and ..
$37.21
Ex Tax:$31.01
Brand: Sanhua
Model: 41.03.008
Country of Manufacture: China
Brand: Sanhua
Valve / Orifice Type: Thermostatic Valve
Series: RFKH
Connection Type: Flare
Refrigerant: R407C
Evaporating Temperature Range: +50/-40oC
Equalization Type: External Equalizer
Design: RFKH Type Body with Interchangeable Orifice (0X ~ 6)
Connection ..
$37.21
Ex Tax:$31.01
Brand: Sanhua
Model: 41.04.009
Country of Manufacture: China
Brand: Sanhua
Valve / Orifice Type: Thermostatic Valve
Series: RFKH
Connection Type: Solder
Refrigerant: R134a
Evaporating Temperature Range: +50/-40oC
Equalization Type: Internal Equalizer
Design: RFKH Type Body with Interchangeable Orifice (0X ~ 6)
Connection..
$33.24
Ex Tax:$27.70
Brand: Sanhua
Model: 41.04.010
Country of Manufacture: China
Brand: Sanhua
Valve / Orifice Type: Thermostatic Valve
Series: RFKH
Connection Type: Solder
Refrigerant: R134a
Evaporating Temperature Range: +50/-40oC
Equalization Type: External Equalizer
Design: RFKH Type Body with Interchangeable Orifice (0X ~ 6)
Connection..
$37.21
Ex Tax:$31.01
-250x250w.jpg "Sanhua RFKH03-4.8-09A Thermostatic Expansion Valve – R404A/R507A, Internally Equalized, 1/2\" Solder Outlet, 4.8 USRT")
Brand: Sanhua
Model: 41.04.056
Sanhua RFKH03-4.8-09A, R404A/R507A refrigerant-specific thermostatic expansion valve (TXV). It continuously adjusts the refrigerant flow entering the evaporator according to the superheat at the evaporator outlet.
Internally Equalized Body (No Equalizer Port): For Evaporators with Low Pressure Drop
..
$33.43
Ex Tax:$27.86
-250x250w.jpg "Sanhua RFKH03-4.8-21A Thermostatic Expansion Valve – R404A/R507A, Internal Equalizer, 1/2\" Flare Outlet, 4.8 USRT")
Brand: Sanhua
Model: 41.04.054
Sanhua RFKH03-4.8-21A is a thermostatic expansion valve (TXV) made for R404A/R507A refrigerant. It continuously adjusts the refrigerant flow entering the evaporator according to the superheat at the evaporator outlet.
Internally Equalized Body (No Equalizer Port): For Evaporators with Low Pressure D..
$33.43
Ex Tax:$27.86
-250x250w.jpg "Sanhua RFKH03-4.8-406A Thermostatic Expansion Valve – R404A/R507A, Range B (−60…−25 °C), MOP −20 °C, 1/2\" Flare")
Brand: Sanhua
Model: 41.02.011
Sanhua RFKH03-4.8-406A, R404A / R507A refrigerant-specific thermostatic expansion valve (TXV). It has two important differences from other RFKH models: Range B low-temperature range and MOP function.
Range B + MOP: For Deep Freezer Applications, with Compressor Protection
1) Range B (−60 … −25 °C): ..
$32.60
Ex Tax:$27.17
Brand: Sanhua
Model: 41.03.010
Country of Manufacture: China
Brand: Sanhua
Valve / Orifice Type: Thermostatic Valve
Series: RFKH
Connection Type: Solder
Refrigerant: R404A
Evaporating Operating Range: +50/-40oC
Equalization Type: External Equalizer
Design: RFKH Type Body with Interchangeable Orifice (0X ~ 6)
Connection S..
$36.50
Ex Tax:$30.42
-250x250h.jpg "Sanhua RFKH03E-4.8-10A Thermostatic Expansion Valve – R404A / R507A, External Equalizer, 1/2\" Solder Outlet, 4.8 USRT")
Brand: Sanhua
Model: 41.04.057
Sanhua RFKH03E-4.8-10A is a thermostatic expansion valve (TXV) made for R404A / R507A refrigerants. It continuously adjusts the refrigerant flow entering the evaporator according to the superheat at the evaporator outlet.
Externally Equalized (E) Body: Correct Superheat on Evaporators with Pressure ..
$36.50
Ex Tax:$30.42
-250x250h.jpg "Sanhua RFKH03E-4.8-15A Thermostatic Expansion Valve – R404A / R507A, External Equalizer, 1/2\" Flare Outlet, 4.8 USRT")
Brand: Sanhua
Model: 41.04.055
Sanhua RFKH03E-4.8-15A is a thermostatic expansion valve (TXV) made for R404A / R507A refrigerants. It continuously adjusts the refrigerant flow entering the evaporator according to the superheat at the evaporator outlet.
Externally Equalized (E) Body: Correct Superheat on Evaporators with Pressure ..
$37.21
Ex Tax:$31.01
Brand: Sanhua
Model: 41.03.020
Precisely balancing the amount of refrigerant entering the evaporator in refrigeration systems, the Sanhua RFKH03E-4.8-309 Thermostatic Expansion Valve offers efficient and stable expansion control thanks to its internally equalized (internal equalizer, solder) design for R404A and its MOP charge. W..
$33.89
Ex Tax:$28.24
Brand: Sanhua
Model: 41.03.016
Country of Manufacture: China
Brand: Sanhua
Valve / Orifice Type: Thermostatic Valve
Series: RFKH
Connection Type: Solder
Refrigerant: R404A
Evaporating Temperature Range: +50/-40oC
Equalization Type: External Equalizer
Design: RFKH Type Body with Interchangeable Orifice (0X ~ 6)
Connection..
$37.21
Ex Tax:$31.01
-250x250w.jpg "Sanhua RFKH04-2.9-23A Thermostatic Expansion Valve – R134a, Internal Equalizer, 1/2\" Flare Outlet, 2.9 USRT")
Brand: Sanhua
Model: 41.04.070
Sanhua RFKH04-2.9-23A is a thermostatic expansion valve (TXV) made for R134a refrigerant. It continuously adjusts the refrigerant flow entering the evaporator according to the superheat at the evaporator outlet.
Internally Equalized Body (No Equalizer Port): For Evaporators with Low Pressure Drop
Th..
$34.07
Ex Tax:$28.39
-250x250w.jpg "Sanhua RFKH04-2.9-30A Thermostatic Expansion Valve – R134a, Internal Equalizer, 1/2\" Solder Outlet, 2.9 USRT")
Brand: Sanhua
Model: 41.04.072
Sanhua RFKH04-2.9-30A is a thermostatic expansion valve (TXV) made for R134a refrigerant. It continuously adjusts the refrigerant flow entering the evaporator according to the superheat at the evaporator outlet.
Internally Equalized Body (No Equalizer Port): For Evaporators with Low Pressure Drop
Th..
$34.07
Ex Tax:$28.39
-250x250h.jpg "Sanhua RFKH04E-2.9-19A Thermostatic Expansion Valve – R134a, External Equalizer, 1/2\" Flare Outlet, 2.9 USRT")
Brand: Sanhua
Model: 41.04.071
Sanhua RFKH04E-2.9-19A is a thermostatic expansion valve (TXV) made for R134a refrigerants. It continuously adjusts the refrigerant flow entering the evaporator according to the superheat at the evaporator outlet.
Externally Equalized (E) Body: Correct Superheat on Evaporators with Pressure Drop
The..
$38.13
Ex Tax:$31.78
-250x250h.jpg "Sanhua RFKH04E-2.9-31A Thermostatic Expansion Valve – R134a, External Equalizer, 1/2\" Solder Outlet, 2.9 USRT")
Brand: Sanhua
Model: 41.04.073
Sanhua RFKH04E-2.9-31A is a thermostatic expansion valve (TXV) made for R134a refrigerants. It continuously adjusts the refrigerant flow entering the evaporator according to the superheat at the evaporator outlet.
Externally Equalized (E) Body: Correct Superheat on Evaporators with Pressure Drop
The..
$38.13
Ex Tax:$31.78
Brand: Sanhua
Model: 41.03.015
Country of Manufacture: China
Brand: Sanhua
Valve / Orifice Type: Thermostatic Valve
Series: RFKH
Connection Type: Flare
Refrigerant: R448/R449
Evaporating Temperature Range: +10/-40oC
Equalization Type: Internal Equalizer
Design: RFKH Type Body with Interchangeable Orifice (0X ~ 6)
Connect..
$33.89
Ex Tax:$28.24
Brand: Sanhua
Model: 41.03.014
Country of Manufacture: China
Brand: Sanhua
Valve / Orifice Type: Thermostatic Valve
Series: RFKH
Connection Type: Solder
Refrigerant: R448/R449
Evaporating Temperature Range: +10/-40oC
Equalization Type: External Equalizer
Design: RFKH Type Body with Interchangeable Orifice (0X ~ 6)
Connec..
$33.89
Ex Tax:$28.24