ΔPC (bar) - Pressure head according to the temperature
20
25
-40
8
9.4
-35
7.8
9.1
-30
7.5
8.8
-25
7.1
8.4
-20
6.7
8
-15
6.1
7.5
-10
5.6
6.9
-5
4.9
6.2
0
4.1
5.5
5
4.6
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
0.63
0.65
0.68
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
1.8
2.2
E2V11B
3.2
3.9
E2V14B
4.9
6
E2V18B
7.0
8.6
E2V24B
14.0
17.1
19.7
E2V35B
28.1
34.5
39.8
E4V55A
68.2
83.5
E4V65A
94
115
E4V85A
132
161
E4V95A
181
221
Tevap. 10°C
4
6
E2V09B
1.8
2.2
E2V11B
3.2
3.9
E2V14B
4.9
6
E2V18B
6.9
8.5
E2V24B
13.8
16.9
19.6
E2V35B
27.8
34.1
39.4
E4V55A
67.5
82.7
E4V65A
93
114
E4V85A
130
160
E4V95A
179
219
Tevap. 5°C
4
6
E2V09B
1.8
2.2
E2V11B
3.2
3.9
E2V14B
4.8
5.9
E2V18B
6.9
8.4
E2V24B
13.7
16.7
19.3
E2V35B
27.5
33.7
38.9
E4V55A
66.7
81.7
94.4
E4V65A
91.7
112
E4V85A
129
158
E4V95A
177
216
250
Tevap. 0°C
6
8
E2V09B
2.1
2.5
E2V11B
3.8
4.4
E2V14B
5.8
6.7
E2V18B
8.3
9.6
10.7
E2V24B
16.5
19.1
21.3
E2V35B
33.3
38.5
E4V55A
80.7
93.2
104.2
E4V65A
110.9
128
E4V85A
156
180
E4V95A
214
247
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
10.9
12.5
14.3
10.6
12.2
14
10.3
11.9
13.7
9.9
11.5
13.3
9.5
11.1
12.9
9
10.6
12.4
8.4
10
11.8
7.7
9.3
11.1
7
8.6
10.4
6.1
7.7
9.5
5.1
6.7
8.5
4
5.7
7.4
CF – Correction factor for the temperature (°C) of the liquid at the valve inlet
-4
2
8
0.71
0.73
0.77
RATING (kW) – Equivalent cooling capacity of the CAREL valves