Alco EX Series Data Sheet

Alco EX Series Data Sheet
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Technical Data
ALCO Controls EX4 / EX5 / EX6 / EX7 / EX8 are stepper motor
driven valves for precise control of refrigerant mass flow in air
conditioning, refrigeration, heat pumps, close control, and
industrial process cooling applications.
The Control Valves can be used as thermo-expansion duty,
liquid injection duty, hot gas bypass, evaporator pressure
regulator, crankcase pressure regulator, head pressure
regulator, or liquid level control.
This data sheet describes only the performance of the valves.
Operation of required controllers, driver boards and sensors
are part of other documentations (see page 29).
EX4 / EX5 / EX6 (Uni-flow/Bi-flow)
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Multifunction as expansion valves, hot gas bypass, suction
gas throttling, head pressure, liquid level actuator etc.
Fully hermetic design (no thread joints between valve body
and motor compartment)
Applicable to all common refrigerants (HCFC, HFC) and for
subcritical CO2 applications
Stepper motor driven
Short opening and closing time
Very fast full stroke time
High resolution and excellent repeatability
Bi-flow versions for heat pump applications
Positive shut-off function to eliminate the use of an
additional solenoid valve
Linear flow capacity
Extremely wide capacity range (10 … 100%)
Continuous modulation of mass flow, no stress (liquid
hammering) in the refrigeration circuit
Direct coupling of motor and valve for high reliability (no
gear mechanism)
Ceramic slide and port for accurate flow and minimal wear
Balanced force design
Corrosion resistant stainless steel body and connections
Europe patent No. 0743476, USA patent No. 5735501,
Japan patent No. 28225789
EX7 (Uni-flow/Bi-flow)
EX8 (Uni-flow)
Selection table
Type
Part No. Flow pattern Capacity range
EX4-I21
800 615
3/8” ODF
5/8” ODF
EX4-M21
800 616
10 mm ODF
16 mm ODF
EX5-U21
800 618
5/8” (16 mm) ODF
7/8” (22 mm) ODF
EX6-I21
800 620
7/8” ODF
1-1/8” ODF
EX6-M21
800 621
EX7-I21
800 624
EX7-M21
800 625
Uni-flow
10 … 100%
Inlet connection
Outlet connection
22 mm ODF
28 mm ODF
1-1/8” (28 mm) ODF
1-3/8” (35 mm) ODF
1-1/8” (28 mm) ODF
1-3/8” (35 mm) ODF
EX8-M21
800 629
42 mm ODF
42 mm ODF
EX8-U21
800 630
1-3/8” (35 mm) ODF
1-3/8” (35 mm) ODF
EX8-I21
800 631
1-5/8” ODF
1-5/8” ODF
EX4-U31
800 617
5/8” (16 mm) ODF
5/8” (16 mm) ODF
7/8” (22 mm) ODF
7/8” (22 mm) ODF
1-1/8” ODF
1-1/8” ODF
Bi-flow
(Heat pump)
EX5-U31
800 619
EX6-I31
800 622
EX6-M31
800 623
28 mm ODF
28 mm ODF
EX7-U31
800 626
1-3/8” (35 mm) ODF
1-3/8” (35 mm) ODF
Electric connector
M12 plug
EX4/5/6/7/8 are delivered without cable/connector assembly (order separately).
EX48_35008_EN_R10.doc
1 / 32
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Cable and connector assembly
Type
Part No.
EX5-N15
804 650
EX5-N30
804 651
EX5-N60
804 652
EX5-L60
804 655
Temperature
Range
Length
Connector type to
valve
Connector type to driver board
or controller
M12
Loose wires
Illustration
1.5 m
-25 … +80°C
3.0 m
6.0 m
-50 …+80°C
6.0 m
M12, low temp.
Introduction
Guidelines for selection of electrical control valves
Thermostatic expansion valves and mechanical regulator valves
have been used in the refrigeration and air conditioning industry
to control superheat and refrigerant mass flow since its very
beginning. As today’s systems require improved energy
efficiency, tighter temperature control, wider range of operating
conditions and incorporate new features like remote monitoring
and diagnostics, the application of electronically operated
valves becomes mandatory. Only they offer the controls
performance necessary to meet these needs.
As more new refrigerants appear on the market requiring an
ever increasing number of different charges and settings for
thermostatic expansion valves, electrical control valves can
solve this problem too.
ALCO electrical control valves are the solution for the
challenges above. The latest technology and more than 80
years of experience in design and production of flow controls
including Thermo® expansion valves have been incorporated in
the design of the EX4, EX5, EX6, EX7 and EX8.
The following guideline should be taken in to the consideration
in order to obtain full advantages of ECV:
Published capacities are maximum. There are no reserve
capacities.
Larger size of valve leads to shorter pull down period and
shorter travel time i.e. faster respond. For example, EX7
has maximum 3.2 seconds travel time. The valve has
approximately 1.6 seconds travel time at 50% capacity
operation.
Construction
EX4/EX5/EX6/EX7/EX8 consist of two main internal
assemblies, the valve and the stepper motor. The stepper motor
is connected directly to the slide and cage assembly of the
valve. Similar to the technology used in compressors, the motor
is exposed to refrigerant and lubricant and the materials used
are identical. The housing of the motor and valve assembly is
fully hermetic, utilising exclusively brazing and welding
technologies and eliminating all gaskets.
This design offers several technical advantages. The motor is
direct coupled to the valve assembly for easy and reliable
movement of the valve slide, no need for any other seals and
eliminating the use of bellows and diaphragms which could be
subject to lifetime limitations and leaks.
Four electrical pins connect the motor to the outside. These
pins are applied to the housing using melting-glass process
technology. The EX4/5/6/7/8 pins require a M12 electrical
connector.
The complete housing of the ECVs is made from stainless steel.
Unlike to mechanical expansion valves, EX4/5/6/7/8 are
equipped with ceramic slide port.
Features:
Wide range regulation (10 … 100%) with one slide orifice
for each valve
Linear characteristic over entire capacity range
Positive shut-off
EX48_35008_EN_R10.doc
ALCO Selection Tool
For easy and quick selection of Electrical Control Valves an
Excel based selection tool can be ordered from the ALCO sales
offices, or use the quick selection tables mentioned in this
datasheet.
Example:
System with R407C having two different operating conditions:
A) 110 kW capacity at +4°C/+50°C with two stages compressor
at 50%/100% capacity
B) 137 kW at +4°C/+30°C with two stages compressor at
50%/100% capacity
EX6 with 126 kW covers condition A, however is not sufficient
to cover condition B. It is recommended to select the larger
valve EX7 which offers 337 kW at condition A and 293 kW at
condition B.
Condition A:
Full load ratio =
110
= 33%
337
Partial load ratio =
(110 / 2)
= 16%
337
Condition B:
Full load ratio =
137
= 47%
293
(137 / 2)
= 23%
293
The capacity ratios of system to valve are in all conditions
higher than 10%. It is recommended to use EX7 rather EX6.
Partial load ratio =
2 / 32
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
EX4/EX5/EX6/EX7/EX8 nominal and extended capacities as expansion valves and liquid injection valves
Nominal Capacities (10% … 100%), kW
Valve Type
R 407C
R 22
EX4
2 ... 17.4
2 ... 16.5
EX5
5 ... 53
5 ... 50
EX6
15 ... 126
15 ... 120
EX7
35 ... 347
35 ... 330
EX8
100 ... 925
90 ... 880
R 134a
1 ... 12.8
4 ... 39
10 ... 93
25 ... 255
70 ... 680
R 404A
1 ... 11.5
4 ... 35
10 ... 84
25 ... 230
60 ... 613
R 410A
2 ... 19.3
6 ... 58
15 ... 140
40 ... 385
100 ... 1027
R 23
2 ... 17.8
5 ... 54
13 ... 130
-
R 124
1 ... 9.2
3 ... 28
7 ... 67
-
R 744
3 ... 33.5
10 ... 102
24 ... 244
70 ... 670
180 ... 1789
Note 1: EX Bi-flow versions are not released for use with R124 and R23 refrigerants.
Note 2: EX Bi-flow versions have identical capacity in both flow direction.
The nominal capacity (Qn) is based on the following conditions:
Refrigerant
Evaporating temperature
Condensing temperature
R 22, R 134a, R 404A, R 410A
+4°C
+38°C
R 407C
+4°C dew point
+38°C bubble / +43°C dew point
R 124
+20°C
+80°C
R 23
-60°C
-25°C
R 744
-40°C
-10°C
Overview of working pressure regardless of applied refrigerant type
Valve type
Flow pattern
Maximum working pressure PS
EX4, EX5, EX6, EX7
Uni-flow/Bi-flow
45 bar
EX8
Uni-flow
45 bar
Subcooling
1K
1K
1K
1K
1K
Factory test pressure PT
49.5 bar
49.5 bar
Capacity Diagrams (kW)
Qn, kW
35
30
R744 (33.5 kW)
R410A (19.3 kW)
25
R23 (17,8 kW)
R407C (17.4 kW)
20
R22 (16.5 kW)
R134a (12.8 kW)
R404A (11.5 kW)
15
34
EX4
19
18
17
17
R124 (9.2 kW)
13
12
9
10
5
0
0
50
00
100
150
200
250
300
350
400
450
500
550
600
650
700
750
Number of Steps
110
R744 (102 kW)
R410A (58 kW)
100
90
EX5
R23 (54 kW)
R407C (53 kW)
80
70
Qn, kW
102
R22 (50 kW)
R134a (39 kW)
R404A (35 kW)
60
50
58
53
54
50
R124 (28 kW)
40
39
35
28
30
20
10
0
0
50
00
100
150
200
250
300
350
400
450
500
550
600
650
700
750
Number of Steps
EX48_35008_EN_R10.doc
3 / 32
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
250
244
R744 (244 kW)
R410A (140 kW)
200
EX6
R23 (130 kW)
R407C (126 kW)
R22 (120 kW)
Qn, kW
150
140
130
126
120
R134a (93 kW)
R404A (84 kW)
100
93
84
67
R124 (67 kW)
50
0
0
0
100
50
150
200
250
300
350
400
450
500
550
600
650
700
750
Number of Steps
700
670
EX7
R744 (670 kW)
600
R410A (385 kW)
500
R407C (347 kW)
Qn, kW
R22 (330 kW)
400
385
347
330
R134a (255 kW)
R404A (230 kW)
300
255
230
200
100
0
0
0
200
400
600
800
1000
1200
1400
1600
Number of Steps
1200
1100
Qn, kW
900
R407C (925 kW)
800
R22 (880 kW)
700
R134a (680 kW)
600
R404A (613 kW)
1027
925
880
EX8
R410A (1027 kW)
1000
680
613
500
400
300
200
100
0
0
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
Number of Steps
EX48_35008_EN_R10.doc
4 / 32
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities as expansion and liquid injection valves
The following tables provide the capacity of valves at different conditions considering 1.5 bar pressure drop through liquid line:
Condensing
temperature
°C
60
55
50
45
40
35
30
25
20
Extended capacity kW
R 410A
15
10
5
0
17
51
123
339
18
53
127
350
935
18
53
128
351
936
17
52
124
342
913
16
49
118
324
864
15
45
108
296
789
13
38
93
255
680
10
29
71
195
520
4
13
31
84
225
17
52
126
348
18
55
132
362
965
18
55
133
366
975
18
54
131
361
962
17
52
126
348
927
16
49
118
326
869
15
44
107
294
786
13
38
91
251
669
9
28
68
188
501
3
10
23
64
172
18
53
129
354
19
56
135
370
988
19
57
137
377
1006
19
57
136
375
1001
18
55
133
366
977
18
53
127
349
932
16
49
118
325
866
15
44
106
291
775
12
37
89
244
652
9
27
65
178
475
1
4
10
28
76
18
54
130
358
19
57
137
377
1005
19
58
140
386
1029
19
58
141
387
1031
19
57
138
381
1015
18
55
134
368
981
17
52
126
348
928
16
48
117
321
855
14
43
103
284
758
12
36
86
236
629
8
25
60
166
443
15
10
EX48_35008_EN_R10.doc
Evaporating temperature °C
-5
-10 -15 -20 -25
18
54
131
360
19
57
138
381
1016
20
59
142
392
1045
20
60
144
395
1054
20
59
142
392
1045
19
58
139
382
1019
18
55
133
366
976
17
52
125
344
916
16
47
114
314
837
14
42
100
276
735
11
34
82
225
600
18
54
131
361
19
58
139
383
1021
20
60
144
396
1056
20
60
146
401
1070
20
60
145
400
1067
20
59
143
393
1048
19
57
138
380
1013
18
54
131
361
964
17
51
122
337
898
15
46
111
305
813
13
40
96
265
706
18
54
131
360
19
58
139
383
1023
20
60
145
398
1061
20
61
147
405
1080
20
61
147
406
1082
20
60
146
401
1069
20
59
142
390
1041
19
56
136
375
1000
18
53
129
354
944
16
49
119
327
873
15
44
107
294
783
18
54
130
358
19
58
139
382
1020
20
60
145
398
1062
20
61
148
407
1085
21
62
149
409
1091
20
61
148
406
1083
20
60
145
398
1061
19
58
140
385
1027
18
55
133
367
979
17
52
125
344
917
16
47
115
315
841
5 / 32
18
53
129
354
19
57
138
380
1014
20
60
144
397
1059
20
61
148
407
1085
21
62
149
411
1095
21
62
149
409
1092
20
61
147
403
1075
20
59
143
392
1046
19
57
137
377
1005
18
54
130
357
951
17
50
121
332
885
Valve
Type
-30
-35
-40
-45
18
53
127
350
19
57
137
377
1005
20
59
143
394
1052
20
61
147
405
1082
21
62
149
411
1095
21
62
149
411
1095
20
61
148
406
1083
20
60
144
397
1058
19
58
139
383
1023
18
55
133
366
976
17
52
125
344
917
17
52
125
344
19
56
135
372
992
20
59
142
391
1043
20
61
146
403
1075
21
62
149
409
1091
21
62
149
410
1095
20
61
148
407
1086
20
60
145
399
1065
19
58
141
388
1034
19
56
135
372
992
18
53
128
352
940
17
51
123
338
18
55
133
366
978
19
58
140
386
1030
20
60
145
399
1064
20
61
148
406
1084
20
62
149
409
1090
20
61
148
406
1084
20
60
146
400
1067
20
59
142
390
1040
19
57
137
376
1003
18
54
130
358
956
17
50
120
331
18
54
131
360
961
19
57
138
380
1015
20
59
143
394
1052
20
61
146
402
1073
20
61
148
406
1082
20
61
147
405
1079
20
60
145
399
1065
20
59
142
390
1042
19
57
137
378
1008
18
55
132
362
965
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities as expansion and liquid injection valves
The following tables provide the capacity of valves at different conditions considering 1.5 bar pressure drop through liquid line:
Condensing temperature
Dew point
°C
Bubble point
°C
64
60
59
55
54
50
50
45
45
40
40
35
35
30
30
25
26
20
21
15
16
10
EX48_35008_EN_R10.doc
Extended capacity kW
R 407C
15
10
5
0
16
50
119
328
874
17
50
120
330
879
16
50
118
326
869
16
48
115
316
843
15
46
109
300
801
14
42
101
278
742
12
38
90
248
661
10
32
75
207
552
7
23
54
148
395
17
51
120
332
884
17
51
122
336
895
17
51
121
334
891
16
50
119
327
873
16
48
114
315
840
15
45
108
297
793
14
42
99
273
729
12
37
88
241
644
10
30
72
199
530
7
21
50
137
365
17
51
121
333
889
17
52
123
339
904
17
52
123
340
906
17
51
122
336
894
16
50
118
326
870
16
48
113
312
832
15
45
106
292
779
13
41
97
266
710
12
36
85
233
621
9
29
69
189
503
6
19
45
123
329
17
51
121
333
889
17
52
124
341
909
17
52
125
343
915
17
52
124
341
909
17
51
121
334
891
16
49
117
323
860
15
47
111
306
817
14
44
103
285
760
13
39
94
258
687
11
34
81
223
594
9
27
64
176
470
Valve
Evaporating temperature °C
-5
-10
-15
-20
-25
17
51
121
332
885
17
52
124
341
908
17
53
125
345
919
17
53
125
344
918
17
52
123
339
905
17
50
120
330
880
16
48
115
317
844
15
46
108
299
796
14
42
100
276
735
12
38
90
247
658
11
32
76
210
561
17
50
119
329
877
17
52
123
339
904
17
53
125
345
919
17
53
125
346
921
17
52
124
342
913
17
51
122
335
894
16
49
118
324
864
15
47
112
309
823
14
44
105
289
770
13
40
96
265
705
12
36
85
234
624
6 / 32
16
50
118
325
867
17
51
122
336
897
17
52
125
343
914
17
53
125
345
920
17
52
125
344
916
17
52
123
338
901
16
50
119
329
876
16
48
115
316
841
15
46
108
299
796
14
42
101
277
740
13
38
91
251
670
16
49
116
320
854
17
51
121
332
886
17
52
123
340
907
17
52
125
344
916
17
52
125
343
915
17
52
123
339
904
17
51
120
331
883
16
49
116
320
853
15
47
111
305
814
14
44
104
287
764
13
40
96
264
704
16
48
114
314
838
16
50
119
328
873
17
51
122
336
896
17
52
124
341
908
17
52
124
341
910
17
52
123
338
902
17
51
121
332
885
16
49
117
322
860
16
47
112
309
825
15
45
106
293
781
14
42
99
273
727
type
-30
-35
-40
-45
15
47
112
308
821
16
49
117
322
858
17
51
120
331
883
17
51
122
337
897
17
52
123
338
902
17
51
122
337
897
17
51
120
331
884
16
49
117
323
861
16
48
113
312
831
15
45
108
297
791
14
43
101
279
743
15
46
109
301
802
16
48
114
315
840
16
50
118
325
868
17
51
120
332
884
17
51
121
334
891
17
51
121
334
889
17
50
120
329
878
16
49
117
322
859
16
48
113
312
832
15
46
108
299
796
14
43
103
282
753
15
45
106
293
781
15
47
112
308
821
16
49
116
319
851
16
50
118
326
869
17
50
120
330
878
17
50
120
330
879
16
50
119
326
870
16
49
116
320
854
16
48
113
311
829
15
46
109
299
797
14
43
103
284
757
14
43
103
285
759
15
46
109
301
801
16
48
113
312
832
16
49
116
320
853
16
49
118
324
864
16
50
118
325
866
16
49
117
323
860
16
48
115
317
846
15
47
112
309
824
15
46
108
298
795
14
43
103
284
758
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities as expansion and liquid injection valves
The following tables provide the capacity of valves at different conditions considering 1.5 bar pressure drop through liquid line:
Condensing
temperature
°C
60
55
50
45
40
35
30
25
Extended capacity kW
R 22
15
10
5
0
17
51
123
337
900
16
50
119
328
876
16
48
114
314
838
15
45
107
295
787
13
41
98
270
719
12
36
86
237
632
10
29
70
194
516
7
20
47
130
347
17
52
126
345
921
17
51
123
339
903
16
50
119
327
873
16
47
113
311
830
15
44
106
290
774
13
40
96
264
703
11
35
83
229
611
9
28
67
184
491
6
18
43
117
312
18
53
128
351
936
17
52
126
346
923
17
51
123
337
899
16
49
118
324
864
15
46
111
306
817
14
43
103
284
757
13
39
93
256
682
11
33
80
220
587
9
26
63
173
461
5
15
37
101
269
18
54
129
355
946
18
53
128
352
938
17
52
125
345
919
17
51
121
334
890
16
48
116
319
850
15
45
109
300
799
14
42
100
276
735
12
37
90
246
656
10
32
76
209
557
8
24
58
160
426
4
12
29
80
214
20
15
10
EX48_35008_EN_R10.doc
Valve
Evaporating temperature °C
-5
-10 -15 -20 -25
-30
-35
-40
-45
18
54
130
357
952
18
54
129
355
948
18
53
127
350
933
17
52
124
341
909
16
50
119
328
875
16
47
113
312
831
15
44
106
291
776
13
40
97
266
709
12
36
85
235
627
10
30
71
196
524
7
22
53
145
386
17
53
127
350
932
18
53
128
353
941
18
54
128
353
942
18
53
127
350
934
17
52
125
345
919
17
51
122
336
896
16
49
118
325
866
16
47
113
311
829
15
45
107
294
784
14
42
100
274
731
13
38
91
251
669
17
52
126
345
921
17
53
127
350
932
18
53
127
351
935
17
53
127
348
929
17
52
125
344
916
17
51
122
336
896
16
49
118
326
869
16
47
114
313
835
15
45
108
298
793
14
42
102
279
745
13
39
94
258
689
17
52
124
340
908
17
52
126
345
921
17
53
126
347
925
17
52
126
346
922
17
52
124
342
911
17
51
122
335
893
16
49
118
326
868
16
48
114
314
837
15
45
109
300
799
14
43
103
283
754
13
40
96
263
702
17
51
122
335
893
17
52
124
340
908
17
52
125
343
914
17
52
124
342
912
17
51
123
339
903
17
50
121
333
888
16
49
118
324
865
16
48
114
314
836
15
46
109
300
801
14
43
104
285
759
13
40
97
267
711
18
54
130
358
954
18
54
130
357
953
18
54
129
354
943
17
52
126
346
923
17
51
122
335
894
16
49
117
321
856
15
46
110
303
808
14
43
102
281
749
13
39
93
254
678
11
34
81
222
593
9
28
66
182
485
18
54
130
357
953
18
54
130
358
955
18
54
129
355
948
17
53
127
349
932
17
52
124
340
907
16
50
119
327
873
16
47
113
312
831
15
44
106
292
779
13
41
98
269
718
12
37
88
241
644
10
31
76
208
554
18
54
129
356
948
18
54
130
357
953
18
54
129
356
949
18
53
128
351
936
17
52
125
343
915
17
50
121
332
885
16
48
116
318
848
15
46
109
301
802
14
42
102
280
747
13
39
93
256
682
11
34
82
227
604
7 / 32
18
53
128
353
941
18
54
129
356
949
18
54
129
355
947
18
53
128
351
937
17
52
125
345
919
17
51
122
335
893
16
49
117
322
859
15
46
112
307
818
14
44
105
288
768
13
40
97
266
710
12
36
87
241
642
Type
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities as expansion and liquid injection valves
The following tables provide the capacity of valves at different conditions considering 1.5 bar pressure drop through liquid line:
Condensing
temperature
°C
60
55
50
45
40
35
30
25
Extended capacity kW
R 134a
15
10
5
0
13
39
93
255
679
12
38
91
249
663
12
36
87
238
636
11
34
81
223
595
10
31
74
202
539
9
27
63
173
463
7
20
49
133
356
3
10
23
63
169
13
39
94
257
686
13
39
92
253
676
12
38
90
246
655
12
36
85
234
623
11
33
79
217
578
10
30
71
194
517
8
25
60
164
436
6
18
44
121
322
2
5
12
34
90
13
39
94
258
688
13
39
93
256
683
13
38
91
250
668
12
37
88
241
642
11
35
83
227
606
10
32
76
209
556
9
28
67
184
492
8
23
55
152
406
5
16
38
105
281
13
39
94
257
686
13
39
94
257
685
13
39
92
253
675
12
38
90
246
655
12
36
85
234
625
11
34
80
219
584
10
30
73
199
531
9
26
63
173
462
7
21
51
139
370
4
13
32
87
231
20
15
10
EX48_35008_EN_R10.doc
Valve
Evaporating temperature °C
-5
-10 -15 -20 -25
-30
-35
-40
-45
13
39
93
255
680
13
39
93
256
683
13
39
93
254
677
12
38
91
248
662
12
37
87
239
638
11
35
83
226
604
11
32
76
210
559
9
29
69
188
501
8
25
58
160
427
6
19
45
123
328
3
9
22
61
162
12
35
84
231
616
12
36
86
237
632
12
37
88
240
640
12
37
88
240
641
12
36
87
238
634
12
36
85
232
620
11
34
82
224
599
11
33
78
214
570
10
31
73
200
533
9
28
67
183
488
8
25
59
162
432
11
34
82
224
598
12
35
84
231
616
12
36
86
235
627
12
36
86
236
629
12
36
85
234
625
12
35
84
230
613
11
34
81
223
595
11
33
78
213
569
10
31
73
201
536
9
28
68
186
495
8
26
61
167
445
11
33
79
217
580
11
34
82
225
599
12
35
84
229
611
12
35
84
231
616
12
35
84
230
614
11
35
83
227
604
11
34
80
221
588
11
32
77
212
565
10
31
73
201
535
9
29
68
187
498
9
26
62
170
452
11
32
77
210
560
11
33
80
218
582
11
34
81
223
595
11
35
82
226
602
11
34
82
225
601
11
34
81
223
594
11
33
79
217
580
11
32
76
210
559
10
31
73
199
532
9
29
68
187
498
9
26
62
171
455
13
39
92
252
672
13
39
93
254
678
13
39
92
253
676
13
38
91
249
664
12
37
88
242
645
12
35
84
231
616
11
33
79
217
578
10
30
72
198
529
9
27
64
175
467
7
22
53
145
388
5
16
38
104
277
12
38
90
248
661
13
38
92
251
670
13
38
92
251
671
12
38
91
249
663
12
37
89
243
647
12
36
85
234
623
11
34
81
221
590
10
31
75
206
548
9
28
68
186
495
8
25
59
161
428
6
20
47
128
341
12
37
89
243
648
12
38
90
247
659
12
38
91
249
663
12
38
90
247
658
12
37
88
242
646
12
36
86
235
625
11
34
82
224
597
11
32
77
210
560
10
29
70
193
514
9
26
62
171
456
7
22
52
144
384
8 / 32
12
36
87
237
633
12
37
88
242
647
12
37
89
245
653
12
37
89
244
651
12
37
88
240
641
12
36
85
234
624
11
34
82
225
600
11
33
78
213
567
10
30
72
197
526
9
27
65
178
475
8
24
56
155
413
Type
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities as expansion and liquid injection valves
The following tables provide the capacity of valves at different conditions considering 1.5 bar pressure drop through liquid line:
Condensing
temperature
°C
60
55
50
45
40
35
30
25
20
R 404A / R507
15
10
5
0
9
28
68
186
495
10
30
72
198
527
10
31
74
203
541
10
31
74
201
537
10
29
71
193
515
9
27
65
178
474
8
23
56
153
409
6
17
42
114
305
1
3
8
21
56
9
28
68
187
498
10
31
73
201
535
10
32
76
208
555
10
32
77
210
559
10
31
75
205
547
10
30
71
195
519
9
27
65
177
472
8
23
55
150
400
5
16
40
108
289
9
28
68
186
496
10
31
74
202
538
11
32
77
211
564
11
33
79
215
574
11
33
78
214
570
10
31
75
207
551
10
30
71
194
517
9
27
64
174
465
7
22
53
146
388
5
15
37
101
268
9
28
67
184
491
10
31
74
202
537
11
32
78
213
567
11
33
80
219
583
11
33
80
219
585
11
33
79
215
574
10
31
75
206
550
10
29
70
191
510
8
26
62
170
453
7
21
51
139
371
5
14
33
91
242
15
10
EX48_35008_EN_R10.doc
Extended capacity kW
Valve
Evaporating temperature °C
-5
-10 -15 -20 -25
-30
-35
-40
-45
9
28
66
181
482
10
30
73
200
533
11
32
78
213
567
11
33
80
220
587
11
34
81
223
594
11
34
81
221
590
11
33
78
215
573
10
31
74
204
543
9
28
68
187
499
8
25
60
164
437
7
20
48
131
350
8
23
56
153
407
9
27
64
176
470
10
30
71
194
518
10
32
76
208
553
11
33
79
217
578
11
34
81
223
594
11
34
82
225
600
11
34
82
224
597
11
33
80
219
585
11
32
77
212
564
10
31
73
201
535
7
22
53
145
387
8
26
62
169
451
9
29
69
188
501
10
31
74
202
539
11
32
78
213
567
11
33
80
219
585
11
34
81
223
593
11
34
81
223
593
11
33
80
220
585
11
32
78
213
569
10
31
75
204
544
7
21
50
137
366
8
25
59
162
432
9
28
66
181
484
10
30
72
196
524
10
32
76
208
553
11
33
79
215
573
11
33
80
219
584
11
34
80
220
587
11
33
80
218
582
11
33
78
214
569
10
31
75
206
548
6
20
47
129
344
8
23
56
154
411
9
27
64
174
465
9
29
69
190
506
10
31
74
202
538
11
32
77
210
560
11
33
79
215
573
11
33
79
217
579
11
33
79
216
576
11
32
78
213
566
10
31
75
206
549
9
27
65
177
471
10
30
72
197
525
11
32
77
211
562
11
33
80
220
586
11
34
82
225
598
11
34
82
225
599
11
34
81
221
588
11
32
78
213
566
10
30
73
200
532
9
28
66
181
484
8
24
57
156
417
9
26
63
172
458
10
29
70
193
514
10
32
76
208
555
11
33
80
219
582
11
34
82
225
598
11
34
83
226
603
11
34
82
224
598
11
33
80
218
582
10
32
76
208
555
10
29
71
194
516
9
26
64
174
464
8
25
61
166
443
9
29
69
188
501
10
31
75
204
545
11
33
79
216
575
11
34
81
223
595
11
34
83
226
604
11
34
83
226
603
11
34
81
222
592
11
33
78
214
571
10
31
74
202
540
9
28
68
186
496
9 / 32
8
24
58
160
425
9
28
67
182
486
10
30
73
200
532
11
32
78
212
566
11
34
81
221
588
11
34
82
225
600
11
34
83
226
603
11
34
82
224
596
11
33
80
218
580
10
32
76
208
555
10
30
71
195
519
Type
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities as expansion and liquid injection valves
The following tables provide the capacity of valves at different conditions considering 1.5 bar pressure drop through liquid line:
Condensing
temperature
°C
-10
-15
-20
-25
-30
-35
-45
17
53
127
16
50
119
15
45
109
13
40
96
11
33
78
7
22
53
-40
-50
18
55
132
17
52
125
16
48
117
14
44
106
13
38
92
10
30
73
6
19
46
-45
Condensing
temperature
°C
100
95
90
85
80
75
70
65
60
Extended capacity kW
R 23
Evaporating temperature °C
-55
19
56
135
18
54
130
17
51
122
15
47
113
14
42
101
12
36
86
9
28
67
5
15
37
EX48_35008_EN_R10.doc
-60
19
57
138
18
55
133
17
53
127
16
49
118
15
45
108
13
40
96
11
33
80
8
25
60
-65
19
58
139
19
56
135
18
54
130
17
51
122
16
47
114
14
43
103
12
37
90
10
30
73
-70
19
58
140
19
57
137
18
55
132
17
52
125
16
49
117
15
45
108
13
40
96
11
34
82
-75
19
58
140
19
57
137
18
55
133
17
53
127
16
50
120
15
46
111
14
42
101
12
37
88
-80
19
58
140
19
57
137
18
55
134
18
53
128
17
51
122
16
47
114
14
43
104
13
39
93
-85
19
58
139
19
57
137
18
55
133
18
53
129
17
51
122
16
48
115
15
44
106
13
40
96
Type
-90
19
57
138
19
57
136
18
55
133
18
53
128
17
51
123
16
48
116
15
45
108
13
41
98
-95
19
57
137
18
56
135
18
55
132
18
53
128
17
51
123
16
48
116
15
45
108
14
41
99
-100
18
56
135
18
55
134
18
54
131
17
53
127
17
51
122
16
48
116
15
45
108
14
41
100
Extended capacity kW
R 124
30
7
22
53
8
24
57
8
25
61
9
26
63
9
27
64
9
27
64
9
26
62
8
25
60
8
23
56
Valve
Valve
Evaporating temperature °C
25
7
21
51
8
23
56
8
25
59
9
26
62
9
27
63
9
27
64
9
26
63
8
26
61
8
24
58
20
7
20
49
7
23
54
8
24
58
8
25
61
9
26
63
9
27
64
9
27
64
9
26
62
8
25
60
15
6
19
47
7
22
52
8
24
56
8
25
60
8
26
62
9
26
63
9
27
63
9
26
63
8
26
61
10
6
18
44
7
21
50
7
23
54
8
24
58
8
25
61
9
26
62
9
26
63
9
26
63
8
26
62
10 / 32
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
Type
5
6
17
42
7
20
47
7
22
52
8
23
56
8
25
59
8
25
61
9
26
62
9
26
62
8
26
62
0
5
16
39
6
19
45
7
21
50
7
23
54
8
24
57
8
25
60
8
25
61
8
26
62
8
26
61
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
EX4
EX5
EX6
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities as expansion and liquid injection valves
The following tables provide the capacity of valves at different conditions considering 1.5 bar pressure drop through liquid line:
Condensing
temperature
°C
10
Extended capacity kW
R 744
8
5
0
-5
-10
5
15
36
99
-
12
36
86
237
-
18
55
132
362
12
37
89
244
-
22
68
164
450
19
57
137
376
12
38
90
247
659
26
79
189
518
23
71
170
466
19
58
139
383
1023
12
37
89
245
654
5
0
-5
-10
-15
Evaporating temperature °C
-15
-20
-25
-30
29
87
208
572
27
81
195
535
24
72
173
475
1267
19
59
140
385
1028
12
36
87
239
639
31
94
225
617
29
90
215
589
27
83
198
544
1452
24
73
174
477
1275
19
58
139
382
1021
11
35
84
229
613
-20
-25
-30
-35
-40
EX48_35008_EN_R10.doc
11 / 32
33
99
238
653
32
96
231
634
30
91
218
598
1598
27
83
199
547
1460
24
72
173
475
1269
19
57
137
376
1003
11
33
79
216
576
34
104
249
683
33
102
244
670
32
98
234
642
1715
30
91
219
601
1604
27
83
198
544
1452
23
71
171
468
1250
18
56
133
365
974
10
30
72
198
528
Valve
Type
-35
-40
-45
-50
35
108
257
707
35
106
254
699
34
103
247
677
1809
32
98
234
644
1718
30
91
217
597
1594
27
82
195
536
1431
23
70
166
457
1220
18
53
128
350
935
9
27
64
175
466
36
110
264
726
36
110
263
722
35
107
257
705
1883
34
103
247
678
1809
32
97
233
639
1705
29
89
214
588
1570
26
80
191
523
1398
22
67
161
442
1179
17
51
121
332
887
7
22
53
145
386
37
113
269
740
37
113
269
739
36
111
265
727
1942
35
107
257
705
1881
34
102
245
671
1793
31
96
229
628
1677
29
87
209
574
1532
25
77
185
507
1353
21
64
154
423
1129
16
47
113
310
828
5
16
37
103
275
38
114
273
750
38
115
274
753
37
113
271
744
1987
36
110
264
725
1937
35
106
254
697
1861
33
100
240
660
1761
31
93
223
613
1636
28
85
202
556
1483
24
74
177
486
1298
20
61
146
400
1068
14
43
103
284
759
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
22.07.2008
Alco Controls
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
EX4/EX5/EX6/EX7/EX8 Nominal and extended capacities as hot gas bypass regulator
Nominal Capacities, kW
Valve Type
Kv, m3/h
EX4
0.21
EX5
0.68
EX6
1.57
EX7
5.58
EX8
16.95
R 22/R 407C
4.9
16
37
131
399
R 134a
3.4
11
26
92
278
R 404A/R 507
4.6
15
35
126
382
The nominal capacity (Qn) is based on the following conditions:
Refrigerant
Evaporating temperature
Condensing temperature
R 22, R 134a, R 404A, R 507
+4°C
+38°C
R 407C
+4°C dew point
+38°C bubble / +43°C dew point
Subcooling
1K
1K
Remarks: Note 1: Bi-flow versions are not released for hot gas bypass applications.
Note 2: EX4, EX5, EX6, EX7 and EX8 must be installed with motor downward in hot gas line applications.
This insures the valve life expectancy.
Extended capacities, kW
Liquid / Condensing temperature
°C
60 bubble point for all refrigerants
(64 dew point for R407C)
50 bubble point for all refrigerants
(54 dew point for R407C)
40 bubble point for all refrigerants
(45 dew point for R407C)
30 bubble point for all refrigerants
(35 dew point for R407C)
EX48_35008_EN_R10.doc
R 22 / R 407C
R 134a
R 404A / R 507
Valve
type
7
23
54
191
581
6.1
20
46
163
495
4.9
16
38
136
414
4.3
14
32
112
340
4.9
16
38
135
411
4.3
14
32
115
348
3.7
12
27
95
289
2.8
9
22
78
236
5.8
19
45
161
488
5.5
18
41
147
447
4.9
16
36
130
394
4
13
31
111
336
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
EX4
EX5
EX6
EX7
EX8
12 / 32
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
EX6/EX7/EX8 Nominal and extended capacities as suction pressure regulator (evaporator or crankcase)
Nominal Capacities, kW
Valve Type
Kv, m3/h
EX6
1.57
EX7
5.58
EX8
16.95
R 407C
3.9
14
42
R 22
4.1
15
45
R 134a
3.1
11
34
The nominal capacity (Qn) is based on the following conditions:
Refrigerant
Evaporating temperature
Condensing temperature
+4°C
+38°C
R 22, R 134a, R 404A
+4°C dew point
+38°C bubble / +43°C dew point
R 407C
R 404A
3.5
13
38
Subcooling
1K
1K
Pressure Drop
0.15 bar
0.15 bar
Remarks: Bi-flow versions are not released for use below -40°C.
EX6, EX7 and EX8 must be installed with motor downward in suction line applications.
This insures the valve life expectancy.
Multiply above nominal capacities by following factors to obtain capacities at different pressure drops:
∆P, bar
Correction factor
0.10
0.82
0.15
1.00
0.20
1.15
0.30
1.41
Example: EX6 provides 3.5 kW at 0.15 bar pressure drop with R404A: 3.5*1.41 = 4.9 kW capacity at 0.3 bar pressure drop.
Extended capacities in kW, suction pressure regulator duty
Condensing
R 22
temperature
°C
60
50
40
30
20
10
5
4
13
41
4
15
45
5
16
49
5
17
53
5
19
56
3
12
37
4
13
41
4
15
45
4
16
48
5
17
52
Condensing temperature
Dew point
°C
Bubble point
°C
64
60
54
50
45
40
35
30
26
20
EX48_35008_EN_R10.doc
Extended capacity kW
Valve
Evaporating temperature °C
0
-10
-20
type
3
11
34
3
12
37
4
13
41
4
14
44
4
15
47
R 407C
10
3
12
36
4
14
41
4
15
46
5
17
51
5
18
55
3
9
27
3
10
30
3
11
33
3
12
36
4
13
39
2
7
22
2
8
24
2
9
27
3
9
29
3
10
31
-30
-40
2
5
17
2
6
19
2
7
21
2
7
22
2
8
24
1
4
12
1
5
14
1
5
15
2
5
16
2
6
18
Valve
Extended capacity kW
Evaporating temperature °C
5
0
-10
3
11
33
3
12
37
4
14
42
4
15
46
5
16
50
3
10
29
3
11
34
3
12
38
4
14
41
4
15
45
2
8
23
2
9
27
3
10
30
3
11
33
3
12
36
13 / 32
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
type
-20
2
6
18
2
7
21
2
8
23
2
9
26
3
9
28
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities in kW, suction pressure regulator duty
Condensing
temperature
R 134a
°C
10
60
50
40
30
20
Condensing
temperature
°C
60
50
40
30
20
3
10
30
3
11
34
3
12
38
4
14
41
4
15
45
Extended capacity kW
Valve
Evaporating temperature °C
5
0
-10
type
2
9
27
3
10
30
3
11
34
3
12
37
4
13
40
2
8
24
2
9
27
3
10
30
3
11
33
3
12
36
5
3
9
29
3
12
36
4
14
42
4
16
48
5
17
53
2
8
26
3
11
32
3
12
38
4
14
43
4
16
48
EX48_35008_EN_R10.doc
-20
1
4
13
1
5
15
2
6
17
2
6
19
2
7
21
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
Extended capacity kW
Valve
Evaporating temperature °C
0
-10
-20
type
R 404A / R 507
10
2
6
18
2
7
21
2
8
23
2
8
26
3
9
28
2
8
23
3
9
29
3
11
34
4
13
39
4
14
44
2
6
18
2
7
23
3
9
27
3
10
31
3
12
35
1
4
13
2
6
18
2
7
21
2
8
25
3
9
28
14 / 32
-30
-40
1
3
10
1
4
13
1
5
16
2
6
19
2
7
21
1
2
7
1
3
9
1
4
12
1
5
14
1
5
16
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
EX5/EX6/EX7/EX8 Nominal and extended capacities as condensing pressure regulator and liquid duty
Nominal Capacities, kW
Valve Type
Kv, m3/h
EX5
0.68
EX6
1.57
EX7
5.58
EX8
16.95
R 407C
18
43
153
463
R 22
20
46
162
491
R 134a
18
42
151
458
The nominal capacity (Qn) is based on the following conditions:
Refrigerant
Evaporating temperature
Condensing temperature
+4°C
+38°C
R 22, R 134a, R 404A
+4°C dew point
+38°C bubble / +43°C dew point
R 407C
R 404A
13
30
106
323
Subcooling
1K
1K
Pressure Drop
0.35 bar
0.35 bar
Multiply above nominal capacities by following factors to obtain capacities at different pressure drops.
∆P, bar
Correction factor
0.15
0.65
Extended capacities, kW
Condensing
R
temperature
°C
10
15
36
128
387
17
41
144
439
19
45
161
488
21
50
177
536
23
54
192
584
60
50
40
30
20
Condensing
temperature
°C
60
50
40
30
20
0.20
0.76
22
0
15
35
124
377
17
40
141
428
19
44
157
477
21
49
173
525
23
53
188
572
0.35
1.00
Extended capacity kW
Evaporating temperature °C
-10
-20
15
34
120
365
16
36
129
391
19
43
153
465
20
48
169
513
22
52
184
560
14
33
116
353
17
39
137
416
18
42
149
453
20
46
165
500
22
51
180
547
Extended capacity kW
-30
-40
14
32
112
341
16
36
129
391
17
41
145
439
19
45
160
486
21
49
175
533
13
30
108
328
15
35
124
377
17
39
140
426
19
44
156
472
21
48
171
519
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
Valve
type
R 134a Evaporating temperature °C
10
0
-10
-20
14
32
115
350
16
37
133
405
18
42
151
458
20
47
168
512
22
52
186
564
13
31
109
332
15
36
127
387
18
41
145
440
20
46
162
493
22
51
180
546
13
29
104
315
15
34
121
369
17
39
139
422
19
44
156
474
21
49
173
526
12
27
98
296
14
32
115
350
16
37
133
403
18
42
150
455
20
47
167
507
EX48_35008_EN_R10.doc
Valve
type
15 / 32
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities in kW, condensing pressure and liquid regulator
Extended capacity kW
Condensing
R 404A / R507 Evaporating temperature °C
temperature
°C
10
0
-10
-20
-30
8
19
66
202
11
24
87
264
13
30
106
321
15
35
123
375
17
40
141
427
60
50
40
30
20
8
17
62
189
10
23
82
250
12
28
101
306
14
33
119
360
16
38
136
412
Bubble point
°C
°C
64
60
54
50
45
40
35
30
26
20
EX48_35008_EN_R10.doc
6
15
53
160
9
20
73
220
11
26
91
276
13
30
108
329
15
35
125
380
6
13
48
146
8
19
67
205
10
24
85
260
12
29
103
312
14
34
120
363
Extended capacity kW
Condensing temperature
Dew point
7
16
58
175
9
22
78
236
12
27
96
291
14
32
114
345
16
37
131
397
0
13
30
108
327
15
36
128
388
18
41
147
446
20
47
166
503
22
52
184
558
-10
12
29
103
313
15
35
123
373
17
40
142
431
19
45
160
487
22
50
179
543
16 / 32
-40
5
12
43
130
8
17
62
189
10
23
80
243
12
27
97
295
14
32
114
346
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
Valve
R 407C Evaporating temperature °C
10
14
32
112
340
16
37
132
402
18
43
152
460
21
48
170
517
23
53
189
573
Valve
type
type
-20
12
28
98
298
14
33
118
358
17
38
137
415
19
44
155
471
21
49
173
526
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
EX5
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
EX6/EX7/EX8 Nominal and extended capacities for hot gas flow such as heat reclaim application
Nominal Capacities, kW
Valve Type
Kv, m3/h
EX6
1.57
EX7
5.58
EX8
16.95
R 22 / R 407C
11
39
119
R 134a
9
33
101
R 404° / R 507
10
36
108
The nominal capacity (Qn) is based on the following conditions:
Evaporating
Refrigerant
Condensing temperature
temperature
+4°C
+38°C
R 22, R 134a, R 404A, R 507, R410A
+4°C dew point +38°C bubble / +43°C dew point
R 407C
R 410A
13
47
144
Subcooling
1K
1K
Pressure
Drop
0.5 bar
0.5 bar
Isentropic
Efficiency
80%
80%
Remarks: Bi-flow versions are not released for hot gas flow applications.
EX6, EX7 and EX8 must be installed with motor downward in suction line applications.
This insures the valve life expectancy.
Extended capacities, kW
Condensing
Pressure
temperature
°C
drop
bar
0.1
60
0.5
1
0,1
50
0.5
1
0.1
40
0.5
1
0.1
30
0.5
1
EX48_35008_EN_R10.doc
Extended capacity kW
R 404A
15
10
5
0
4
15
45
9
32
99
13
45
137
5
16
49
10
35
107
14
49
149
5
16
50
10
36
109
14
50
152
5
16
49
10
35
108
14
49
149
4
14
43
9
31
95
12
44
132
4
16
47
10
34
104
13
48
145
4
16
49
10
35
107
14
49
148
4
16
48
10
35
105
13
48
146
4
14
42
8
30
92
12
42
127
4
15
46
9
33
101
13
46
141
4
16
47
10
34
104
13
48
144
4
15
47
10
34
103
13
47
142
4
13
40
8
29
88
11
40
122
4
15
44
9
32
98
13
45
136
4
15
46
9
33
101
13
46
140
4
15
46
9
33
101
13
46
139
Valve
Evaporating temperature °C
-5
-10
-15
-20
-25
4
13
38
8
28
84
11
39
117
4
14
43
9
31
95
12
43
131
4
15
45
9
32
98
13
45
136
4
15
45
9
32
98
13
45
135
3
12
36
7
26
80
10
37
112
4
14
41
8
30
91
12
42
127
4
14
43
9
31
95
12
44
132
4
14
43
9
31
95
12
43
132
17 / 32
3
11
35
7
25
76
10
35
106
4
13
40
8
29
88
11
40
122
4
14
42
9
30
92
12
42
128
4
14
42
9
31
93
12
42
128
3
11
33
7
24
72
9
33
101
4
13
38
8
28
84
11
38
117
4
13
40
8
29
89
11
41
124
4
13
41
8
30
90
12
41
124
3
10
31
6
22
68
9
31
95
3
12
36
7
26
80
10
37
112
4
13
39
8
28
86
11
39
119
4
13
40
8
29
87
11
40
120
Type
-30
-35
-40
-45
3
10
29
6
21
64
8
29
89
3
11
35
7
25
77
10
35
107
3
12
37
8
27
83
11
38
115
4
13
38
8
28
84
11
38
117
3
9
27
6
20
60
8
27
84
3
11
33
7
24
73
9
33
102
3
12
36
7
26
79
10
36
110
3
12
37
8
27
81
10
37
113
2
8
25
5
18
56
7
26
78
3
10
31
6
23
69
9
32
96
3
11
34
7
25
76
10
35
105
3
12
36
7
26
78
10
36
109
2
8
23
5
17
52
7
24
72
3
10
30
6
22
65
8
30
91
3
11
33
7
24
73
9
33
101
3
11
34
7
25
76
10
34
104
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities kW, hot gas flow such as heat reclaim applications
Condensing
Pressure
temperature
°C
drop
bar
40
Type
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
5
16
50
5
16
49
4
16
47
4
15
46
4
15
44
4
14
43
4
14
41
4
13
40
4
13
38
3
12
37
3
12
35
3
11
33
3
10
32
10
36
110
14
50
152
10
35
107
14
49
148
10
34
104
13
47
144
9
33
101
13
46
139
9
32
97
12
44
135
9
31
94
12
43
130
8
30
91
12
41
126
8
29
87
11
40
121
8
28
84
11
38
116
7
26
80
10
37
112
7
25
77
10
35
107
7
24
74
9
34
102
6
23
70
9
32
97
0,1
5
16
49
4
16
48
4
15
47
4
15
45
4
14
44
4
14
43
4
14
41
4
13
40
4
13
39
3
12
37
3
12
36
3
11
35
3
11
33
0.5
10
35
108
10
35
105
9
34
102
9
33
99
9
32
97
9
31
94
8
30
91
8
29
88
8
28
85
8
27
82
7
26
79
7
25
76
7
24
73
1
14
49
148
13
48
145
13
46
141
13
45
137
12
44
133
12
43
129
12
41
125
11
40
121
11
39
117
10
37
113
10
36
109
10
34
105
9
33
100
0.1
4
16
47
4
15
46
4
15
45
4
14
44
4
14
43
4
14
42
4
13
40
4
13
39
4
13
38
3
12
37
3
12
36
3
11
34
3
11
33
0.5
10
34
103
9
33
100
9
32
98
9
32
96
9
31
93
8
30
91
8
29
88
8
28
86
8
27
83
7
26
80
7
26
78
7
25
75
7
24
73
13
46
141
4
15
44
13
45
138
4
14
43
12
44
134
4
14
42
12
43
131
4
14
42
12
42
128
4
13
41
12
41
124
4
13
40
11
40
121
4
13
39
11
39
117
3
12
38
11
38
114
3
12
37
10
36
110
3
12
35
10
35
107
3
11
34
10
34
103
3
11
33
9
33
100
3
11
32
9
32
96
12
43
130
9
31
94
12
42
128
9
30
92
12
41
125
8
30
90
11
40
122
8
29
88
11
39
119
8
28
86
11
38
117
8
28
84
11
37
114
8
27
81
10
36
111
7
26
79
10
35
108
7
25
77
10
34
105
7
25
75
9
33
102
7
24
72
9
32
98
6
23
70
9
31
95
0.5
1
0.1
30
Evaporating temperature °C
10
1
50
Valve
15
0.1
60
Extended capacity kW
R 134a
0.5
1
EX48_35008_EN_R10.doc
18 / 32
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities kW, hot gas flow such as heat reclaim applications
Condensing
Pressure
temperature
°C
drop
bar
Type
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
6
20
59
12
43
131
5
19
58
12
42
129
5
19
57
12
41
126
5
18
55
11
40
123
5
18
54
11
39
119
5
17
53
11
38
116
5
17
51
10
37
113
5
16
50
10
36
110
4
16
48
10
35
107
4
15
47
10
34
103
4
15
45
9
33
100
4
14
44
9
32
97
4
14
42
9
31
94
17
60
183
5
19
58
17
59
179
5
19
57
16
58
175
5
18
56
16
56
171
5
18
54
15
55
167
5
17
53
15
53
162
5
17
52
15
52
158
5
17
51
14
51
154
5
16
49
14
49
149
4
16
48
13
48
145
4
15
47
13
46
140
4
15
45
13
45
135
4
14
44
12
43
131
4
14
42
12
42
128
17
59
178
12
41
126
16
57
175
11
40
123
16
56
171
11
40
120
15
55
167
11
39
117
15
54
163
11
38
115
15
52
159
10
37
112
14
51
155
10
36
109
14
50
151
10
35
106
14
49
147
10
34
103
13
47
143
9
33
100
13
46
139
9
32
97
13
44
135
9
31
94
12
43
131
5
18
56
11
40
123
5
18
55
11
40
120
5
18
54
11
39
118
5
17
52
11
38
115
5
17
51
10
37
113
5
16
50
10
36
110
5
16
49
10
35
108
4
16
48
10
35
105
4
15
47
9
34
103
4
15
45
9
33
100
4
15
44
9
32
97
4
14
43
9
31
94
4
14
42
8
30
92
1
16
56
170
15
55
167
15
54
163
15
53
160
14
52
157
14
50
153
14
49
149
14
48
146
13
47
142
13
46
139
12
44
135
12
43
131
12
42
127
0.1
5
17
53
5
17
52
5
17
51
5
16
50
4
16
49
4
16
48
4
15
46
4
15
45
4
15
44
4
14
43
4
14
42
4
14
41
4
13
40
0.5
11
38
115
10
37
113
10
37
111
10
36
109
10
35
107
10
34
104
9
34
102
9
33
100
9
32
97
9
31
95
9
30
93
8
30
90
8
29
88
1
15
52
159
14
51
156
14
50
153
14
49
150
14
48
147
13
47
144
13
46
141
13
45
138
12
44
134
12
43
131
12
42
128
12
41
124
11
40
121
0,1
0.5
1
0.1
0.5
30
Evaporating temperature °C
5
1
40
Valve
10
0.5
50
Extended capacity kW
15
0.1
60
R 22 / R 407C*
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
*) Condensing temperatures R 407C:
The relation between bubble points and dew points is as follows:
Bubble point
°C
Dew point
°C
60
64
50
54
40
45
30
35
EX48_35008_EN_R10.doc
19 / 32
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Extended capacities kW, hot gas flow such as heat reclaim applications
Condensing
Pressure
temperature
°C
drop
bar
40
Type
10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
6
21
63
6
20
62
6
20
60
5
19
58
5
19
57
5
18
55
5
18
53
5
17
52
5
16
50
4
16
48
4
15
46
4
15
44
13
47
143
19
66
200
13
46
140
18
64
196
13
45
137
18
63
191
12
44
133
17
61
186
12
43
130
17
60
182
12
41
126
16
58
177
11
40
122
16
56
171
11
39
118
15
55
166
11
38
115
15
53
161
10
36
111
14
51
155
10
35
107
14
49
150
10
34
103
13
47
144
9
32
99
13
46
138
0,1
6
22
67
6
22
66
6
21
65
6
21
63
6
20
62
6
20
60
5
19
59
5
19
57
5
18
55
5
18
54
5
17
52
5
17
50
4
16
48
0.5
14
49
149
14
48
146
13
47
143
13
46
140
13
45
137
12
44
133
12
43
130
12
42
126
11
40
123
11
39
119
11
38
115
10
37
111
10
35
108
1
19
69
209
19
67
204
19
66
200
18
64
196
18
63
191
17
61
186
17
60
182
16
58
177
16
57
172
15
55
167
15
53
161
14
51
156
14
50
151
0.1
6
22
67
6
22
66
6
21
65
6
21
63
6
20
62
6
20
60
5
19
59
5
19
58
5
18
56
5
18
54
5
17
53
5
17
51
5
16
50
0.5
14
49
148
13
48
146
13
47
143
13
46
140
13
45
137
12
44
134
12
43
131
12
42
127
11
41
124
11
40
121
11
39
117
11
37
114
10
36
110
19
68
207
6
21
65
19
67
203
6
21
64
18
66
199
6
21
63
18
64
195
6
20
61
18
63
191
6
20
60
17
61
187
5
19
59
17
60
182
5
19
58
16
59
178
5
19
56
16
57
173
5
18
55
16
55
168
5
18
53
15
54
164
5
17
52
15
52
159
5
17
51
14
51
154
5
16
49
13
47
143
18
65
199
13
46
141
18
64
195
13
45
138
18
63
192
13
45
135
17
62
188
12
44
133
17
61
185
12
43
130
17
60
181
12
42
127
16
58
177
12
41
124
16
57
173
11
40
121
16
56
169
11
39
118
15
54
165
11
38
115
15
53
160
10
37
112
14
51
156
10
36
109
14
50
152
0.5
1
0.1
30
Valve
6
21
64
1
50
Extended capacity kW
Evaporating temperature °C
15
0.1
60
R 410A
0.5
1
EX48_35008_EN_R10.doc
20 / 32
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
EX6
EX7
EX8
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Application of control valves in systems
The following schematics show the arrangement of integrated valves for different applications.
Legends:
TC
Pump
Thermo Expansion valve
Compressor
Condenser/Evaporator
P
Pressure transmitter
T
Temperature sensor
Flow direction
Check valve
Plate heat exchanger
Sight glass
Liquid Receiver
Solenoid valve
Suction accumulator
Four way reversing valve
Filter dryer
Overview applications:
Application 1: Expansion valve in cooling system
Application 2: Bi-Flow expansion valve in heat pump (except EX8)
Application 3: Expansion valve in heat pump (one valve)
Application 4: Expansion valve in heat pump (two valves)
Application 5: Expansion valve as liquid injection valve for desuperheating
Application 6: Expansion valve as liquid injection valve for subcooling
Application 7: Capacity control by means of hot gas bypass
Application 8: Capacity control by means of suction pressure throttling
Application 9: Crankcase pressure control
Application 10: Head pressure control
Application 11: Liquid level control
EX48_35008_EN_R10.doc
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page
22
22
23
23
24
24
25
25
26
26
27
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Application 1: Expansion valve in cooling system
2
EC3-X33
1
(1) = Expansion Valve
(2) = Superheat controller EC3-X33
Application 2: Bi-Flow expansion valve in heat pump (except EX8)
2
EC3-X33
1
(1) = Bi-Flow Expansion Valve
(2) = Superheat controller EC3-X33
EX48_35008_EN_R10.doc
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22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Application 3: Expansion valve in heat pump (one valve)
2
EC3-X33
1
(1) = Expansion Valve
(2) = Superheat controller EC3-X33
Application 4: Expansion valve in heat pump (two valves)
1
1
(1) = Expansion Valve, heating mode
(2) = Expansion Valve, cooling mode
EX48_35008_EN_R10.doc
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22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Application 5: Expansion valve as liquid injection valve for desuperheating
4-20mA/0-10V
1
T
2
3
TC
(1) = Temperature Controller
(2) = Stepper motor driver EXD-U00
(3) = Electrical Control Valve
Application 6: Expansion valve as liquid injection valve for subcooling
4-20mA/0-10V
1
2
3
T
TC
(1) = Temperature Controller
(2) = Stepper motor driver EXD-U00
(3) = Electrical Control Valve
EX48_35008_EN_R10.doc
24 / 32
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Application 7: Capacity control by means of hot gas bypass
2
3
4-20mA/0-10V
5
1
T
TC
4
Remarks:
(1) = Temperature Controller
(2) = Check Valve: It is important to install a check valve just
after T-connection as shown. Check valve will not allow return
of liquid refrigerant from condenser through electrical control
valve in to the evaporator during power interruption to system.
(3) = Hot gas bypass valve must be installed with motor
downward. This insures the valve life expectancy.
(4) = Liquid Distributor must be selected properly for hot gas
mass flow.
(5) = Stepper motor driver EXD-U00
Application 8: Capacity control by means of suction pressure throttling
Remarks:
(1) = Temperature Controller
(2) = Evaporator temperature regulator. EX6, EX7 and EX8
must be installed with motor downward in suction line
applications. This insures the valve life expectancy.
EX48_35008_EN_R10.doc
(3) This application may require additional liquid injection to
suction line for desuperheating of compressor by means of
suction line superheat control or discharge line temperature
control. Please consult Alco Controls for more details.
(4) = Stepper motor driver EXD-U00
25 / 32
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Application 9: Crankcase pressure control
Remarks:
(1) = Pressure Controller
(2) = Crankcase pressure regulator. ECVs must be installed
with motor downward in suction line applications. This insures
the valve life expectancy.
(3) = Stepper motor driver EXD-U00
Application 10: Head pressure control
P
2
1
3
4-20mA/0-10V
TC
(1) = Pressure Controller
(2) = Condensing pressure regulator
(3) = Stepper motor driver EXD-U00
EX48_35008_EN_R10.doc
26 / 32
22.07.2008
Alco Controls
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Application 11: Liquid level control
(1) = Level Controller
(2) = Liquid level sensor
(3) = Stepper motor driver EXD-U00
Note: ECVs are not released for use with ammonia.
EX48_35008_EN_R10.doc
27 / 32
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Driver and controller
In contrary to thermo-expansion and regulator valves, stepper
motor driven valves are not self operated actuators and require:
a stepper motor driver which generates the digital pulse
sequence needed to move the stepper motor in clockwise
or counter clockwise direction
an algorithm which determines the opening of the valve as
a function of system parameters and conditions.
Alco Controls offers several solutions for this task:
EC3-X33 Superheat controller as stand alone for all
applications and EC3-X32 Superheat controller for use in
TCP/IP networks. The modules contain all required algorithms
for full operation of ALCO ECVs. For further details please refer
to EC3X33 or EC3X32 technical data sheet.
EC3-33x Cold Room Controller is a digital temperature
controller primary for refrigeration applications such as cold
rooms. It features temperature control, superheat control and
defrost, compressor and fan management where applicable.
For further details please refer to EC33x technical data sheet.
The following information is for those customers who want
to develop their own driver/controller/algorithms:
Function
1) Motor
A 2-phase bipolar stepper motor drives the EX4/5/6/7/8. This
motor follows the basic operating characteristics of any stepper
motor i.e. the motor will be held in position unless current
pulses from a driver board initiate rotation in either direction.
The direction of the rotation depends on the phase relationship
of the current pulses, the amount of rotation is dependent on
the number of pulses. One pulse will drive the motor one step
i.e. the rotor will move by α=1.8°. Successive pulses will lead to
continuous rotation.
The drive shaft of the rotor is connected to a spindle which
transforms the rotation into linear motion of the valve slide.
1α
0
2α
3α
EXD-U Universal driver is a stepper motor driver which uses
an analogue input signal to define the valve opening. It enables
the operation of EX4/EX5/EX6/EX7/EX8 as:
• Electronic expansion valve
• Capacity control by means of hot gas bypass or evaporating
pressure regulator
• Crankcase pressure regulator
• Condenser pressure regulator
• Liquid level actuator
• Liquid injection valve
The input signal for the driver module can be 4…20mA or
0…10V. The output pulses provide the proportional
opening/closing of EX4/EX5/EX6/EX7/EX8 and consequently
the control of liquid or vapour refrigerant mass flow. The
universal driver module can be connected to any controller
which provides the analogue signal. This gives system
manufacturers the extreme flexibility to use any desired
controller in conjunction with the universal driver module to
achieve different functionality. For further details please refer to
EXD-U technical data sheet.
The patented valve control module VCM is a hybrid integrated
circuit, which provides the superheat algorithm and the stepper
motor driver to those customers, who want to integrate the
valve control into their own system controller. This solution is
mainly for OEMs having serial mass production systems.
2) Valve
The gate type valve is optimised to provide a wide range of
capacity with a linear relation between flow and positioning of
the valve (capacity vs. number of steps). Slide and ports are
made from ceramic for precise flow characteristics, high
resolution and infinite life.
The compliant slide eliminates undesirable horizontal forces
caused by differential pressure (across the valve) to the cage
assembly and shaft of stepper motor. The internal design of the
EX4/5/6/7/8 is patented.
Total valve travel is 750 full steps for EX4/5/6, 1600 steps for
EX7 and 2600 steps for EX8.
A mechanical stop in the fully closed position of the valve acts
as reference point. The controller is reset by driving the valve
towards the fully closed position against the mechanical stop.
By overdriving the valve i.e. applying more than the full number
of steps, it can be assured that the reference point is correct.
Pulse
1
2
3
M
Time
closed
Angular rotation (cross section of shaft)
EX48_35008_EN_R10.doc
28 / 32
M
open
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
4
8
10
9
1
7
6
5
3) Driving of stepper motor
There are many different options to drive stepper motors like
the one used in the EX4/5/6/7/8. Alco Controls stepper motors
need a driver board with chopper drive function (constant
current), an interface and a controller.
Chopper drive (constant current)
The stepper motor of EX4/5/6/7/8 is a bipolar, 2-phase
permanent-magnet motor and operates with constant DC
current in each phase. A driver board with chopper drive
function feeds a DC current as indicated below to the windings
of the stepper motor.
Time in ms
Current in A
0,5
2
6
3
0,0
0
1
2
3
4
5
6
7
8
9
10
Stainless steel body
Stepper motor
Electrical connector
Cage assembly
Shaft
Welding and/or brazing
Ceramic inlet port
Ceramic slide
Ceramic outlet port
Bearing
EX48_35008_EN_R10.doc
0,002
0,004
0,006
0,008
0,01
0,012
0,014
0,016
0,018
0,02
-0,5
4) Design of customised driver board
A suitable driver board must be selected according to the
electrical data of the stepper motor and based on the following
requirements:
•
Electrical output (four-stage switching sequence, see next
page)
•
Stepping rate: 500Hz for EX4/5/6/7/8
•
Chopper function, current:
29 / 32
Current
EX4/5/6
EX7
EX8
Operating
500 mA
750 mA
800 mA
Holding
100 mA
250 mA
500 mA
22.07.2008
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Alco Controls
Sequence for driving of stepper motor and valve
Direction
Valve
Reverse
direction
Number
of steps
Identification code of pins for electrical connections to third party
drivers/controllers
A
B
C
Current direction
D
+
-
+
-
Valve
Step 1
is
is
Step 2
-
+
+
-
opening
closing
Step 3
-
+
-
+
Step 4
+
-
-
+
Remark
↓
↓
The sequence is repeated from step 5 to 8 similar to step 1 to 4
Step 5
+
-
+
-
Step 6
-
+
+
-
Step 7
-
+
-
+
Step 8
+
-
-
+
Remark
The sequence is repeated from step 9 to 12 similar to step 1 to 4
↓
↓
EX4/EX5/EX6/EX7/EX8
identification code of pins
for
electrical connection to
third party drivers/controllers
M12 plug and cable assembly (EX5-xxx)
for EX4/EX5/EX6/EX7/EX8
Cable, wire colour
A
B
C
D
EX48_35008_EN_R10.doc
White
Black
Blue
Brown
30 / 32
22.07.2008
Alco Controls
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Technical data
CE marking
EX4/EX5/EX6:
EX7/EX8:
Compatibility
(not released for use with
inflammable refrigerants)
MOPD (maximum operating
pressure differential)
Max. working pressure, PS
Ambient temperature
Storage temperature
Medium temperature range
Bi-flow version:
Uni-flow version
Salt spray test
Humidity
Connections
not required
required, Cat I, Module A
HCFCs, HFCs, CO2
Mineral and POE lubricants
EX4/EX5/EX6/EX7: 35 bar
EX8: 30 bar
45 bar
-40 to +55°C
-40 to +70°C
TS: -40 to +80°C
TS: -50 to +100°C
non-corrosion stainless steel
body
5 to 95% r.H.
ODF stainless steel fittings
Protection accordance to
IEC 529, DIN 40050
IP67 with Alco supplied cable
connector assembly
Vibration for non-connected and fastened valve
4g
(0 to 1000 Hz, 1 octave /min.)
Shock
Net weight (kg)
20g at 11 ms
80g at 1 ms
0.5 kg (EX4), 0.52 kg (EX5), 0.60
kg (EX6), 1.1 kg (EX7), 1.5 kg
(EX8)
External leakage
≤ 3 gram / year
Seat leakage
Positive shut-off better than
solenoid valves
Accessories
See table on page 2
Package and delivery
(individual)
without electrical connector
EX4/EX5/EX6: 30 mH ± 25%
EX7: 20 mH ± 25%
EX8: 22 mH ± 25%
2 phase full step
Electrical data
Stepper motor type
Bi-polar, phase current
by chopper control (constant
current)
Phase inductance
Electrical connection
Reccom. driver supply voltg.
4 pin terminal via plug
24 VDC (nominal)
Step mode
Step angle
Driver supply voltage range
18 … 36 VDC
Total number of steps
Phase current, operating
EX4/EX5/EX6: 500mA max,
-10%
EX7: 750mA ±10%
EX8: 800mA ±10%
EX4/EX5/EX6: 100mA
EX7: 250mA
EX8: 500mA
Stepping rate
EX4/EX5/EX6: 3.5W
EX7/EX8: 5W
Full travel time
Holding current
Nominal input power per
phase
Winding resistance per
phase
Reference position
EX48_35008_EN_R10.doc
31 / 32
1.8° per step ± 8%
EX4/EX5/EX6: 750 full steps
EX7: 1600 full steps
EX8: 2600 full steps
500Hz
EX4/EX5/EX6: 13Ohm ±10%
EX7: 8Ohm ±10%
EX8: 6Ohm ±10%
EX4/EX5/EX6: 1.5 seconds
EX7: 3.2 seconds
EX8: 5.2 seconds
Mechanical stop at fully close position
22.07.2008
Alco Controls
EX4 / EX5 / EX6 / EX7 / EX8
Electrical Control Valves
Dimensions EX4 / EX5 / EX6 / EX7
Dimensions EX8
Valve Type Ø A x Ø F (ODF)
B
C
D
E
H1
H2
EX4-I21
3/8" x 5/8"
8
45
55
11
113
25
EX4-M21
10 x 16 mm
8
45
55
11
113
25
EX4-U31
16 x 16 mm
(5/8" x 5/8")
11
55
55
11
113
25
EX5-U21
5/8" x 7/8"
(16 x 22 mm)
11
55
65
16
113
25
EX5-U31
7/8" x 7/8"
(22 x 22 mm)
16
65
65
16
113
25
EX6-I21
7/8" x 1-1/8"
16
65
75
19
113
25
EX6-M21
22 x 28 mm
16
65
75
19
113
25
EX6-I31
1-1/8" x 1-1/8"
19
75
75
19
113
25
EX6-M31
28 x 28 mm
19
75
75
19
113
25
EX7-I21
1-1/8" x 1-3/8"
20
77.5 82.5
23
157
42
EX7-M21
28 x 35 mm
20
77.5 82.5
23
157
42
EX7-U31
1-3/8 x 1-3/8
(35 x 35 mm)
23
82.5 82.5
23
157
42
EX8-M21
42 x 42 mm
20
80
80
20
200
56
EX8-U21
1-3/8 x 1-3/8
(35 x 35 mm)
20
80
80
20
200
56
Ex8-I21
1-3/8 x 1-3/8
20
80
80
20
200
56
ALCO CONTROLS is not to be held responsible for erroneous literature
regarding capacities, dimensions, applications, etc. stated herein.
Products, specifications and data in this literature are subject to change
without notice. The information given herein is based on technical data
and tests which ALCO CONTROLS believes to be reliable and which
are in compliance with technical knowledge of today. It is intended only
Emerson Electric GmbH & Co. OHG
ALCO CONTROLS
Heerstraße 111
71332 Waiblingen
Germany
Phone ...49-(0)7151-509-0
Fax ...49-(0)7151-509-200
www.emersonclimate.eu
EX48_35008_EN_R10.doc
for use by persons having the appropriate technical knowledge and
skills, at their own discretion and risk. Since conditions of use are
outside of ALCO'S control we can not assume any liability for results
obtained or damages occurred due to improper application.
This document replaces all earlier versions.
Benelux
Denmark & Finland
Eastern Europe, Turkey & Iran
France, Greece, Maghreb
Deutschland, Österreich, Schweiz
Italia
Middle East & Africa
Poland
Russia & Cis
España & Portugal
Sweden & Norway
UK & Ireland
32 / 32
Phone.:
+31 (0)773 240 234
+32 (0)87 305 565
+32 (0)87 305 061
+33 (0)478 668 570
+49 (0)6109 6059 0
+39 02 961 78 1
+97 148 832 828
+48 (0)22 458 9205
+7 495 981 9811
+34 93 4 123 752
+32 (0)87 305 565
+44 (0)1 189 838 000
Fax:
+31 (0)773 240 235
+49 24 08 929 568
+32 (0)87 305 506
+33 (0)478 668 571
+49 (0)6109 6059 40
+39 02 961 78 888
+97 148 832 848
+48 (0)22 458 9255
+7 495 981 9816
+34 93 4 124 215
+49 24 08 929 568
+44 (0)1 189 838 001
22.07.2008
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