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 orice assembly

◦ easy storage ◦ easy capacity matching ◦ better service. ◦ easy cleaning and replacement of lter

• 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

4

3

1

2

Danfoss

68Z05.14.20

1234Thermostatic element (diaphragm)

Interchangeable orice assembly

Valve body

Superheat setting spindle (see instructions)

Thermostatic expansion valve, type T 2 and TE 2

Functions

Figure 1: Functions

T2 and TE2 valves have an interchangeable orice assembly.

The orice 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 xed 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.

Refrigerant

Range N

-40 °C – 10 °C

Range NM

-40 °C – -5 °C

Range NL

-40 °C – -15 °C

Range B

-60 °C – -25 °C

MOP-point in evaporating temperature te and evaporating pressure p

e

(1)

15 °C / 60 °F

0 °C / 32 °F

-10 °C / 15 °F

-20 °C / -4 °F

R22

100 psig / 6.9 bar (abs)

60 psig / 4.0 bar (abs)

35 psig / 2.4 bar (abs)

20 psig / 1.4 bar (abs)

R407C

95 psig / 6.6 bar (abs)

–––

R134a

55 psig / 3.8 bar (abs)

30 psig / 2.0 bar (abs)

15 psig / 1.0 bar (abs)

–

R404A/R507

120 psig / 8.3 bar (abs)

75 psig / 5.2 bar (abs)

50 psig / 3.4 bar (abs)

30 psig / 2.1 bar (abs)

Orice no.

Rated capacity in tons (TR)

R22

R407C

R134a

R513A

R404A

R507

R407A

R407F

R448A

R449A

R454C

R455A

R1234yf

0X

0.25

0.26

0.19

0.16

0.18

0.25

0.28

0.26

0.25

0.22

0.24

0.1400.51

0.51

0.34

0.29

0.37

0.49

0.56

0.51

0.49

0.42

0.47

0.251110.59

0.51

0.7511.110.97

0.79

0.93

0.4321.3

1.4

0.73

0.6211.3

1.5

1.4

1.311.3

0.5332.3

2.3

1.211.8

2.3

2.6

2.3

1.8

2.2

0.8843.4

3.5

1.8

1.5

2.8

3.5

4.1

3.6

3.5

2.6

3.3

1.354.8

4.7

2.423.7

4.6

5.4

4.6

4.5

3.4

4.2

1.765.6

5.6

2.9

2.5

4.4

5.6

6.5

5.7

5.5

4.2

5.2

2.1

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

(1)

Pe in bar gauge

Superheat

SS = static superheat OS = opening superheat SH = SS + OS = total superheat Q

= rated capacity

nom

Q

= maximum capacity

max

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 Q

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

nom

.

The rated capacity is based on: Evaporating temperature te = 40 °F Condensing temperature tc = 100 °F Refrigerant temperature ahead of valve tl = 98 °F

Orice no.

Rated capacity in kW

R22

R407C

R134a

R513A

R404A

R507

R407A

R407F

R448A

R449A

R454C

R455A

R1234yf

0X

0.9

0.92

0.68

0.58

0.64

0.8810.9

0.88

0.77

0.86

0.4901.8

1.8

1.211.3

1.721.8

1.7

1.5

1.7

0.8713.5

3.5

2.1

1.8

2.6

3.4

3.9

3.5

3.4

2.8

3.3

1.524.7

4.8

2.6

2.2

3.7

4.7

5.4

4.8

4.6

3.6

4.4

1.838

8.1

4.3

3.7

6.389.2

8.1

7.9

6.2

7.6

3.1412.1

12.4

6.4

5.4

9.9

12.4

14.3

12.6

12.1

9.3

11.5

4.6516.7

16.5

8.4

6.91316.31916.3

15.7

11.8

14.7

5.9619.7

19.7

10.1

8.6

15.5

19.6

22.9

19.8

19.1

14.8

18.3

7.3

Valve type

Orice

no.

Cond. temp. [°C]

Evaporating [°C]

-40

-30

-20

-10

T2 / TE2

0X250.76

0.83

0.88

0.9

T2 / TE2000.99

1.21

1.42

1.6

T2 / TE211.41

1.8

2.27

2.77

Subcooling [K]241015

Correction factor

0.98

1

1.07

1.12

Thermostatic expansion valve, type T 2 and TE 2

Table 3: Range N: -40 to 10 °C

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

fsub× fp

0.98 × 0.96

The selection will be: TE2 orice 00 (1.21 kW > 1.17 kW)

Table 4: Capacity in kW, range N -40 °C to 10 °C. Opening superheat sh= 6 K

= selectedcapacity

1.1 = 1.17kW

Table 5: Subcooling correction factor 'fsub'