Danfoss T 2, TE 2 Data sheet
Data Sheet
Thermostatic expansion valve
Type T 2 and TE 2
Thermostatic expansion valves maintain a constant superheat level at the evaporator outlet
Thermostatic expansion valves regulate the injection of refrigerant liquid into evaporators.
Injection is controlled by the refrigerant superheat.
Therefore the valves are especially suitable for liquid injection in ”dry“ evaporators where the superheat at the evaporator outlet is proportional to the evaporator load.
AI241486443133en-001401
Thermostatic expansion valve, type T 2 and TE 2
Features
•Large temperature range
◦Equally applicable to freezing, refrigeration and air conditioning applications.
•Interchangeable oriƒce assembly
◦easy storage
◦easy capacity matching
◦better service.
◦easy cleaning and replacement of ƒlter
•Rated capacities from 1 to 20.5 kW / 0.3 to 5.8 TR for R407C
•Can be supplied with MOP (Max. Operating Pressure).
◦Protects the compressor motor against excessive evaporating pressure during normal operation
•Stainless steel bulb and Danfoss patented bulb strap
◦Fast and easy to install
◦Good temperature transfer from pipe to bulb
•Valves for special temperature ranges can be supplied
•Design protected
© Danfoss | Climate Solutions | 2021.03 |
AI241486443133en-001401 | 2 |
Thermostatic expansion valve, type T 2 and TE 2
Functions
Figure 1: Functions
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4 |
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3 |
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1Thermostatic element (diaphragm)
2Interchangeable oriƒce assembly
3Valve body
4Superheat setting spindle (see instructions)
T2 and TE2 valves have an interchangeable oriƒce assembly.
The oriƒce assembly is suitable for all versions of valve body and refrigerants and in all evaporating temperature ranges.
The charge in the thermostatic element depends on the refrigerant and evaporating temperature range.
The valves are available with internal (T2) or external (TE2) pressure equalization.
External pressure equalization should always be used on systems with liquid distributors. The bulb gives fast and precise reaction to temperature changes in the evaporator. The bulb is ƒxed with a Danfoss patented bulb strap for quick, easy and reliable connection. The valves are able to withstand the e…ects that normally occur with hot gas defrosting.
To ensure long operating life, the valve cone and seat are made of a special alloy with particularly good wear qualities.
© Danfoss | Climate Solutions | 2021.03 |
AI241486443133en-001401 | 3 |
Thermostatic expansion valve, type T 2 and TE 2
Product speci€cation
Technical data
Max. temperature
Bulb, when valve is installed: 100 °C
Bulb, element not mounted: 60 °C
Min. temperature
T2 – TE2: -60 °C
Max. test pressure
PT = 38 bar
Max. working pressure
PS/MWP = 34 bar
Table 1: Technical data
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Range N |
Range NM |
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Range NL |
Range B |
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Refrigerant |
-40 °C – 10 °C |
-40 °C – -5 °C |
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-40 °C – -15 °C |
-60 °C – -25 °C |
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MOP-point in evaporating temperature t |
e |
and evaporating pressure p (1) |
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e |
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15 °C / 60 °F |
0 °C / 32 °F |
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-10 °C / 15 °F |
-20 °C / -4 °F |
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R22 |
100 psig / 6.9 bar (abs) |
60 psig / 4.0 bar (abs) |
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35 psig / 2.4 bar (abs) |
20 psig / 1.4 bar (abs) |
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R407C |
95 psig / 6.6 bar (abs) |
– |
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– |
– |
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R134a |
55 psig / 3.8 bar (abs) |
30 psig / 2.0 bar (abs) |
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15 psig / 1.0 bar (abs) |
– |
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R404A/R507 |
120 psig / 8.3 bar (abs) |
75 psig / 5.2 bar (abs) |
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50 psig / 3.4 bar (abs) |
30 psig / 2.1 bar (abs) |
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(1) Pe in bar gauge
Superheat
SS = static superheat OS = opening superheat
SH = SS + OS = total superheat Qnom = rated capacity
Qmax= maximum capacity
Static superheat SS can be adjusted with setting spindle. Standard superheat setting SS is 4K for all standard valves.
The opening superheat OS is 6 K from when opening begins to where the valve gives its rated capacity Qnom.
Example
Static superheat SS = 5 K Opening superheat OS = 6 K Total superheat SH = 5 + 6 = 11 K
Table 2: Range N: -40 to 50 °F
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Rated capacity in tons (TR) |
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Ori‚ce no. |
R22 |
R407C |
R134a |
R513A |
R404A |
R407A |
R407F |
R448A |
R449A |
R454C |
R455A |
R1234yf |
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R507 |
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0X |
0.25 |
0.26 |
0.19 |
0.16 |
0.18 |
0.25 |
0.28 |
0.26 |
0.25 |
0.22 |
0.24 |
0.14 |
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0 |
0.51 |
0.51 |
0.34 |
0.29 |
0.37 |
0.49 |
0.56 |
0.51 |
0.49 |
0.42 |
0.47 |
0.25 |
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1 |
1 |
1 |
0.59 |
0.51 |
0.75 |
1 |
1.1 |
1 |
0.97 |
0.79 |
0.93 |
0.43 |
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2 |
1.3 |
1.4 |
0.73 |
0.62 |
1 |
1.3 |
1.5 |
1.4 |
1.3 |
1 |
1.3 |
0.53 |
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3 |
2.3 |
2.3 |
1.2 |
1 |
1.8 |
2.3 |
2.6 |
2.3 |
2.3 |
1.8 |
2.2 |
0.88 |
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4 |
3.4 |
3.5 |
1.8 |
1.5 |
2.8 |
3.5 |
4.1 |
3.6 |
3.5 |
2.6 |
3.3 |
1.3 |
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5 |
4.8 |
4.7 |
2.4 |
2 |
3.7 |
4.6 |
5.4 |
4.6 |
4.5 |
3.4 |
4.2 |
1.7 |
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6 |
5.6 |
5.6 |
2.9 |
2.5 |
4.4 |
5.6 |
6.5 |
5.7 |
5.5 |
4.2 |
5.2 |
2.1 |
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The rated capacity is based on:
Evaporating temperature te = 40 °F
Condensing temperature tc = 100 °F
Refrigerant temperature ahead of valve tl = 98 °F
© Danfoss | Climate Solutions | 2021.03 |
AI241486443133en-001401 | 4 |
Thermostatic expansion valve, type T 2 and TE 2
Table 3: Range N: -40 to 10 °C
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Rated capacity in kW |
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Ori‚ce no. |
R22 |
R407C |
R134a |
R513A |
R404A |
R407A |
R407F |
R448A |
R449A |
R454C |
R455A |
R1234yf |
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R507 |
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0X |
0.9 |
0.92 |
0.68 |
0.58 |
0.64 |
0.88 |
1 |
0.9 |
0.88 |
0.77 |
0.86 |
0.49 |
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0 |
1.8 |
1.8 |
1.2 |
1 |
1.3 |
1.7 |
2 |
1.8 |
1.7 |
1.5 |
1.7 |
0.87 |
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1 |
3.5 |
3.5 |
2.1 |
1.8 |
2.6 |
3.4 |
3.9 |
3.5 |
3.4 |
2.8 |
3.3 |
1.5 |
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2 |
4.7 |
4.8 |
2.6 |
2.2 |
3.7 |
4.7 |
5.4 |
4.8 |
4.6 |
3.6 |
4.4 |
1.8 |
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3 |
8 |
8.1 |
4.3 |
3.7 |
6.3 |
8 |
9.2 |
8.1 |
7.9 |
6.2 |
7.6 |
3.1 |
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4 |
12.1 |
12.4 |
6.4 |
5.4 |
9.9 |
12.4 |
14.3 |
12.6 |
12.1 |
9.3 |
11.5 |
4.6 |
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5 |
16.7 |
16.5 |
8.4 |
6.9 |
13 |
16.3 |
19 |
16.3 |
15.7 |
11.8 |
14.7 |
5.9 |
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6 |
19.7 |
19.7 |
10.1 |
8.6 |
15.5 |
19.6 |
22.9 |
19.8 |
19.1 |
14.8 |
18.3 |
7.3 |
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The rated capacity is based on:
Evaporating temperature te = 4.4 °C
Condensing temperature tc = 38 °C
Refrigerant temperature ahead of valve tl = 37 °C
Valve selection based on capacity calculation
As for extended capacity calculations and valve selection based on capacities and refrigerants, please refer to Coolselector®2. Rated and extended capacities are calculated with the Coolselector®2 calculation engine to ARI standards with the ASEREP equations based on laboratory measurements of selected valves.
How to select a valve
Example: Refrigerant = R407C Q (capacity) = 1.1kW
Tcond (condensing temperature) = 25 °C Tevap (evaporator temperature) = -30 °C Tsub (subcooling temperature) = 2 K Dpd (distributer pressure drop) = 1 bar Q (capacity) = 1.1kW
fsub (subcooling correction factor) = 0.98 fp (distribution correction factor) = 0.96
Q |
= selected capacity |
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fsub×fp |
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1.1 |
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= 1.17 kW |
0.98 × 0.96 |
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The selection will be: TE2 oriƒce 00 (1.21 kW > 1.17 kW)
Table 4: Capacity in kW, range N -40 °C to 10 °C. Opening superheat sh= 6 K
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Valve type |
Ori‚ce no. |
Cond. temp. [°C] |
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Evaporating [°C] |
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-40 |
-30 |
-20 |
-10 |
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T2 / TE2 |
0X |
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0.76 |
0.83 |
0.88 |
0.9 |
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T2 / TE2 |
00 |
25 |
0.99 |
1.21 |
1.42 |
1.6 |
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T2 / TE2 |
1 |
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1.41 |
1.8 |
2.27 |
2.77 |
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Table 5: Subcooling correction factor 'fsub'
Subcooling [K] |
2 |
4 |
10 |
15 |
Correction factor |
0.98 |
1 |
1.07 |
1.12 |
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© Danfoss | Climate Solutions | 2021.03 |
AI241486443133en-001401 | 5 |
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