Data Sheet
ENVIRO-SEAL Bellows Seal
D101641X012
Product Bulletin
59.1:070
December 2012
6
Table 7. Flow C oefficients with ENVIRO-SEAL Bellows Seal and easy-eValves
VALVE
DESIGN
VALVE
SIZE,
NPS
BELLOWS SEAL
TRAVEL
FULL-SIZE TRIM RESTRICTED TRIM
mm Inch
Quick
Opening
Linear
Equal
Percentage
Quick
Opening
Linear
Equal
Percentage
C
v
ED,EDR,ET,
and ETR (Flow Down)
1
1-1/2
2
3
4
14.2
14.2
22.2
(1)
28.6
38.1
(2)
0.56
0.56
0.88
(1)
1.125
1.50
(2)
21.5
40.4
74.7
152
243
17.8
32.5
65.1
126
192
9.37
21.0
31.4
81.5
148
---
26.8
31.2
91.9
130
---
22.5
33.3
102
113
---
11.1
24.3
70.7
112
C
g
1
1-1/2
2
3
4
14.2
14.2
22.2
(1)
28.6
38.1
(2)
0.56
0.56
0.88
(1)
1.125
1.50
(2)
641
1300
2390
4740
7990
559
1090
2130
4130
6680
325
695
1070
2690
5000
---
990
1120
3170
4750
---
760
1110
3490
4220
---
357
783
2370
4040
ES (Flow Up)
C
v
1/2
3/4
1
1-1/2
2
3
4
14.2
14.2
14.2
14.2
22.2
(1)
28.6
38.1
(2)
0.56
0.56
0.56
0.56
0.88
(1)
1.125
1.50
(2)
6.53
14.2
21.2
38.0
67.2
140
228
---
---
16.8
28.4
60.6
117
174
---
---
11.3
20.4
30.9
73.1
125
---
---
---
30.0
39.4
115
183
---
---
---
19.5
30.9
88.8
139
---
---
---
10.0
20.8
67.5
121
C
g
1/2
3/4
1
1.5
2
3
4
14.2
14.2
14.2
14.2
22.2
(1)
28.6
38.1
(2)
0.56
0.56
0.56
0.56
0.88
(1)
1.125
1.50
(2)
206
415
688
1325
2410
4780
8000
---
---
565
967
2100
4100
6170
---
---
367
679
1090
2540
4250
---
---
---
992
1350
3990
6280
---
---
---
659
1050
3060
4910
---
---
---
334
710
2320
4230
EZ (Flow Up)
C
v
1/2
3/4
1
1.5
2
3
4
14.2
14.2
14.2
14.2
22.2
(1)
28.6
38.1
(2)
0.56
0.56
0.56
0.56
0.88
(1)
1.125
1.50
(2)
4.44
9.72
16.8
33.6
58.5
127
221
---
---
11.6
27.5
46.2
93.4
168
---
---
9.15
13.1
38.8
73.4
118
---
---
---
19.0
17.9
88.4
86.7
---
---
---
12.0
15.7
80.4
86.8
---
---
---
10.0
15.9
71.5
72.7
C
g
1/2
3/4
1
1-1/2
2
3
4
14.2
14.2
14.2
14.2
22.2
(1)
28.6
38.1
(2)
0.56
0.56
0.56
0.56
0.88
(1)
1.125
1.50
(2)
168
341
475
1250
2140
4490
7940
---
---
375
921
1630
3460
5860
---
---
299
417
1330
2400
3770
---
---
---
727
687
3120
2910
---
---
---
380
599
2783
2979
---
---
---
302
605
2450
2570
Note: Bellows seal travel is 75% of maximum rated valve travel.
1. 19.1 mm (0.75 inch) travel for restricted trim.
2. 28.6 mm (1.125 inch) travel for restricted trim.