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3.5 ELECTRONIC EXPANSION VALVE SELECTION - R134a refrigerant
ΔPC (bar) - Pressure head according to the temperature
20
25
5.2
6.1
-40
-35
5.1
6.0
-30
4.9
5.8
-25
4.7
5.6
-20
4.4
5.3
-15
4.1
5.0
-10
--
4.7
-5
--
4.2
0
--
--
--
--
5
10
--
--
15
--
--
Table 1: determine the design pressure head ΔP from the saturated evaporating temperature Tevap and condensing temperature Tcond for the chosen refrigerant.
Tliq [°C]
-22
-16
-10
CF
0.59
0.61
0.64
Table 2: identify the Correction Factor CF at the temperature nearest to Tliq (if no certain data is available, assume Tliq = Tcond – 5°C)
Tevap. 15°C
4
6
E2V09B
1.7
2.1
E2V11B
3.1
3.7
E2V14B
4.7
5.7
E2V18B
6.7
8.2
E2V24B
13.3
16.2
E2V35B
26.7
32.7
E4V55A
64.8
79.3
E4V65A
89
109
E4V85A
125
153
E4V95A
171
210
Tevap. 10°C
4
6
E2V09B
1.7
2.1
E2V11B
3
3.7
E2V14B
4.6
5.6
E2V18B
6.5
8
E2V24B
13
15.9
E2V35B
26.2
32.1
E4V55A
63.6
77.8
89.9
E4V65A
87
107
E4V85A
123
150
E4V95A
168
206
Table 3: The equivalent cooling capacity values in the table refer to a liquid temperature at the valve inlet = 38°C. For temperatures other than 38°C, in the table identify the
valve with the equivalent capacity RATING that is higher than or equal to the required rated cooling capacity CAP multiplied by the coeffi cient shown in Table 2. To allow for any
uncertainty in the design data, the values in the tables correspond to 80% of the maximum effective cooling capacity .
Tcond – Saturated condensing temperature (°C)
30
35
40
7.2
8.4
9.7
7.0
8.2
9.5
6.9
8.0
9.3
6.6
7.8
9.1
6.4
7.6
8.8
6.1
7.2
8.5
5.7
6.9
8.2
5.3
6.5
7.7
4.8
6.0
7.3
4.2
5.4
6.7
--
4.7
6.0
--
4.0
5.3
CF – Correction factor for the temperature (°C) of the liquid at the valve inlet
-4
2
8
0.67
0.70
0.74
RATING (kW) – Equivalent cooling capacity of the CAREL valves
ΔPv [bar]
8
10
12
14
2.4
2.7
3
3.2
4.3
4.8
5.3
5.7
6.6
7.4
8.1
8.8
9.4
10.5
11.5
12.5
18.8
21
23
24.8
37.8
42.2
46.3
50
91.6
102
112
121
126
141
154
166
177
198
217
234
242
271
297
321
ΔPv [bar]
8
10
12
14
2.4
2.7
2.9
3.2
4.2
4.7
5.2
5.6
6.5
7.3
8
8.6
9.2
10.3
11.3
12.2
18.4
20.6
22.5
24.4
37.1
41.5
45.4
49.1
100
110
119
124
138
151
163
174
194
213
230
238
266
291
315
45
50
55
60
11.1
12.7
14.4
16.3
10.9
12.5
14.2
16.1
10.8
12.3
14.1
16.0
10.5
12.1
13.8
15.7
10.3
11.9
13.6
15.5
10.0
11.5
13.3
15.2
9.6
11.2
12.9
14.8
9.2
10.8
12.5
14.4
8.7
10.3
12.0
13.9
8.1
9.7
11.4
13.3
7.5
9.0
10.8
12.7
6.7
8.3
10.0
11.9
14
20
26
32
0.78
0.82
0.87
0.93
Tevap. 5°C
16
4
3.4
E2V09B
1.7
6.1
E2V11B
2.9
9.4
E2V14B
4.5
13.3
E2V18B
6.4
26.5
E2V24B
12.8
53.4
E2V35B
25.7
130
E4V55A
62.3
76.3
178
E4V65A
85.6
250
E4V85A
120
343
E4V95A
165
Tevap. 0°C
16
4
3.4
E2V09B
1.6
6
E2V11B
2.9
9.2
E2V14B
4.4
13.1
E2V18B
6.3
26
E2V24B
12.5
52.4
E2V35B
25.2
30.8
127
E4V55A
61
74.7
175
E4V65A
83.9
246
E4V85A
118
337
E4V95A
162
10
65
18.4
18.2
18.0
17.8
17.6
17.3
16.9
16.5
16.0
15.4
14.7
14.0
38
44
50
1.00
1.08
1.17
ΔPv [bar]
6
8
10
12
2
2.3
2.6
2.9
3.6
4.2
4.7
5.1
5.5
6.4
7.1
7.8
7.8
9.1
10.1
11.1
15.6
18
20.2
22.1
31.5
36.4
40.6
44.5
88.1
99
108
105
121
135
148
147
170
190
209
202
233
261
286
ΔPv [bar]
6
8
10
12
2
2.3
2.6
2.8
3.5
4.1
4.6
5
5.4
6.2
7
7.7
7.7
8.9
9.9
10.9
15.3
17.7
19.8
21.6
35.6
39.8
43.6
86.3
96
106
103
119
133
145
144
167
186
204
198
228
255
280
+030220815 rel. 1.0 del 08.05.07
R134a
56
62
1.28
1.42
14
16
3.1
3.3
5.5
5.9
8.4
9
12
12.8
23.9
25.5
48.1
51.4
117
125
160
171
225
241
309
330
14
16
3
3.2
5.4
5.8
8.3
8.8
11.7
12.6
23.4
25
47.1
50.4
114
122
157
168
221
236
302
323
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