Danfoss TGE 10, TGE 20, TGE 40, TGE Data sheet
Data Sheet
Thermostatic expansion valves
Type TGE
The TGE series of thermostatic expansion valves have balanced port design
TGE is a dedicated designed series of thermostatic expansion valves for all standard refrigerants.
The tight design meets the environmental demands for today and future. Versions for non standard refrigerants can be produced to order.
Applications
• Water chillers
• Bus A/C
• Rooftop units
• Heat pumps
• Refrigerated containers
• Others A/C and refrigeration system
AI246186497192en-001001
Thermostatic expansion valves, Type TGE
Features
•Refrigerants: R410A, R32, R452B, R454B, R22, R134a, R1234ze, R407F, R407A, R404A, R507, R407C and R290
•Capacity range: 3.5 – 52 TR / 12 – 182 kW for R410A
•Balance port design
•Biflow with expansion in both directions
•Low hysteresis
•Long lifetime for heat pump applications
•Mechanical connections types solder ODF, flare, MIO, ORFS are available
•Laser welded, stainless steel power element, capillary tube, and bulb
•MOP (Max. Operating Pressure) function is available
•Optional bleed function
•PS / MWP (maximum working pressure): 49 bar/ 711 psig
•Straightway flow
•Adjustable superheat setting
•UL certified
© Danfoss | Climate Solutions | 2021.06 |
AI246186497192en-001001 | 2 |
Thermostatic expansion valves, Type TGE
Functions
Figure 1: Balanced port design TGE 10 |
Figure 2: Double balanced port design TGE 20 and TGE 40 |
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4 |
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6 |
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7 |
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Danfoss |
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67N47.10 |
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8 |
1 |
Bulb with capillary tube |
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5 |
Cone |
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2 |
Thermostatic element |
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6 |
Valve body |
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3 |
Thrust pad |
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7 |
Static SH adjustment spindle |
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4 |
Push pin seal |
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8 |
Protective cap |
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Balanced port design and advantage
The TGE series of thermostatic expansion valves have balanced port design.
Balanced port design prevents changes in pressure drop across the valve from influencing operation and provides excellent control on applications having widely varying operating conditions.
Balanced port TXV’s are recommended in refrigeration and air conditioning systems with any combinations of these conditions:
1.Widely varying head pressures
2.Widely varying evaporator loads
3.Widely varying pressure drop across the TXV
4.Fluctuating or extremely low liquid temperatures
5.Intermittent liquid line flash gas
TGE valves are designed for biflow operations. TGE 10 has minor capacity reduction in reverse flow.
© Danfoss | Climate Solutions | 2021.06 |
AI246186497192en-001001 | 3 |
Thermostatic expansion valves, Type TGE
The central push pin is fitted with a robust seal (Pos 4) that ensures maximum tightness for the life of the valve.
Static superheat (SS) can be adjusted by the setting spindle (Pos 7), see Figure 1: Balanced port design TGE 10 & .Figure 2: Double balanced port design TGE 20 and TGE 40
The standard superheat setting (SS) is 4K / 7.2 °F and adjustable for 0 – 8K / 0 – 14.4 °F.
SS = Static Superheat
OS = Opening Superheat
SH = SS + OS = total superheat
Example:
Static superheat SS = 4K / 7.2 °F
Opening superheat OS = 4K / 7.2 °F
The opening superheat is 4K / 7.2 °F, i.e. from the point the valve begins to open up to rated capacity. Opening superheat is determined by the design and cannot be changed.
Total superheat SH = SS + OS
SH = 4 + 4 = 8K / 14.4 °F
Total superheat SH can be altered by changing SS (by using the setting spindle).
© Danfoss | Climate Solutions | 2021.06 |
AI246186497192en-001001 | 4 |
Thermostatic expansion valves, Type TGE
Applications
Figure 3: A diagram of a traditional refrigeration plant where TGE is used for flow in one direction only.
TGE |
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Outdoor coil |
EVR |
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SGI/SGN |
DCL/DML |
Figure 4: A conventional split heat pump system shown in cooling mode. This system has two TGE thermostatic expansion valves with fixed direction flow. An NRV check valve is placed in series with each TGE to allow liquid refrigerant to bypass when flow is opposite the TXV fixed direction
Indoor coil |
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Outdoor coil |
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STF |
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TGE |
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TGE |
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SGI/SGN |
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DCB/DMB |
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NRV |
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NRV |
© Danfoss | Climate Solutions | 2021.06 |
AI246186497192en-001001 | 5 |
Thermostatic expansion valves, Type TGE
Figure 5: A heat pump system similar to that in fig. 4 but with a more compact design, where the distance between evaporator and condenser is very short. This system has only one bi–flow TGE valve metering liquid refrigerant eƒectively in both directions. Changeover is by means of a 4–way valve. A suction filter drier is often placed in suction lines just before the compressor. The normal flow direction of TGE is determined by the primary function, i.e. cooling or heating
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Outdoor coil |
Indoor coil |
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STF |
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DML/DCL |
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TGE |
© Danfoss | Climate Solutions | 2021.06 |
AI246186497192en-001001 | 6 |
Thermostatic expansion valves, Type TGE
Product specification
Technical data
Max. temperature on thermostatic element:
MAH : 150 °C / 302 °F
K : 150 °C / 302 °F
N: 100 °C / 210 °F
Max. temperature on valve body: 110 °C / 230 °F
Max. working pressure: 49 bar / 711 psig.
Max. test pressure: 54 bar / 783 psig.
Table 1: Standard evaporating temperature ranges
Charge |
Temperature range |
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MAH |
-30 |
– 15 °C / -22 |
– 60 °F |
N |
-40 |
– 10 °C / -40 |
–50 °F without MOP |
K |
–25 – 10 °C, MOP 15 °C / –15 – 50 °F, MOP 60 °F |
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Table 2: Max. operating pressure
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Refrigerant |
Range K: –25 – 10 °C / –15 – 50 °F, MOP +15 °C / +60 °F |
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MOP point in evaporating pressure pe |
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R410A |
11.4 bar / 165 psig |
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R22 |
6.9 bar / 100 psig |
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R134a |
3.8 bar / 55 psig |
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R407C |
6.6 bar / 95 psig |
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R404A/ R507 |
8.3 bar / 120 psig |
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NOTE:
MOP for R32, R452B, R454B, R1234ze, R407F, R407A and R290, please contact Danfoss for more info.
Table 3: Connections
Type |
Inlet solder ODF |
Inlet solder ODF |
Outlet solder ODF |
Outlet solder ODF [mm] |
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[inch] |
[mm] |
[inch] |
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TGE 10 |
3⁄8, 1⁄2, 5⁄8, 7⁄8 |
10, 12, 16, 22 |
5⁄8, 7⁄8, 11⁄8 |
16, 22, 28 |
TGE 20 |
5⁄8 , 7⁄8 , 11⁄8 |
16, 22, 28 |
5⁄8 , 7⁄8 , 11⁄8 , 13⁄8 |
16, 22, 28, 35 |
TGE 40 |
7⁄8 , 11⁄8 |
22, 28 |
7⁄8 , 11⁄8 , 13⁄8 |
22, 28, 35 |
Table 4: Capillary tube length
Type |
Capillary tube length |
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TGE 10 / TGE 20 |
1.5 m |
59 inch |
TGE 40 |
3 m |
118 inch |
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Valve options
In addition to the standard programme, variants of following options may be available:
•Refrigerants
•Evaporating temperature range
•MOP point
•Static superheat setting (0K – 8K / 0 – 14.4 °F)
•Mechanical connections
•Bleed function (15% or 30%)
NOTE:
Please contact your nearest Danfoss sales oˆce to discuss valve options.
Refrigerants
Refrigerants: R410A, R32, R452B, R454B, R22, R134a, R1234ze, R407F, R407A, R404A, R507, R407C and R290.
© Danfoss | Climate Solutions | 2021.06 |
AI246186497192en-001001 | 7 |
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