• Eccentric butterfly valve
  • Eccentric butterfly valve

Eccentric butterfly valve

Material of eccentric butterfly valve:  WCB,WC6,LCB,CF8,CF8M.CF3.CF3M,CN7M,904L

Size of eccentric butterfly valve:  2inch(DN50) - 160 inch (DN4000)

Pressure of eccentric butterfly valve:  150LB(PN10)-600LB(PN100)

Connection type:  Flange(FF,RF,) BW, WAFER

Kind of drive:  Wrench,Gear,Electric actuators and pneumatic actuators

Operating temperature :  -100℃ - 400℃

Working medium :  water, gas,oil,

Catalogue:

butterfly valve.pdf


Introduction for eccentric butterfly valve:

For the structure of the eccentricity butterfly valve, they have two types, one type is double eccentric butterfly valve and another type is triple Eccentric Butterfly Valve, the seal of this valves is very good and the sealing face  is very wear-resisting.when the valve is under the complete open state, the sealing face for disc will break away from the valve sealing face of seat completely; when it is opened from 0 to 90°, the sealing face for disc  will break away from the  sealing face of seat upon opening; when it is closed from 90° to 0° and only upon closing, the sealing face for disc can contact and press onto the valve seat sealing face tightly.this type of the valves mainly used in high pressure and high temperature intra-domain.about the material of the seat ,we can choose graphite ,PTFE or other  stainless steel.


Features for eccentric butterfly valve

Design standard as per: API 609, ASME B16.34, GB/T12238, JB/T 8527.

Small installation space, light weight, and maintenance friendly;

Good sealing effect and long service life;

Simple structure and small opening/closing torque;

Good flow adjusting ability, high precision of flow characteristic curve and good dynamic adjustment stability;

For soft seat the leakage rate: ANSI B 16.104 Ⅵ.

It can used for high pressure and high temperature intra-domain.

Double eccentric butterfly valve


inch
L
L1
D
D1
D2
H2
H1
H
M
Z-d
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
2"
1.72
43
4.25
108
6.00
152
4.75
120.5
3.62
92
4.33
110
11.02
280
13.58
345
M18
4-19
3"
1.93
49
4.50
114
7.50
190
6.00
152.5
5.00
127
4.92
125
12.40
315
14.96
380
M18
4-19
4"
2.20
56
5.00
127
9.00
229
7.50
190.5
6.19
157
5.70
145
13.78
350
16.34
415
M20
8-19
5"
2.50
64
5.50
140
10.00
254
8.50
216
7.32
186
6.50
165
15.35
390
17.91
455
M20
8-22
6"
2.75
70
5.50
140
11.00
279
9.50
241.5
8.50
216
6.89
175
17.91
455
21.45
545
M20
8-22
8"
2.80
71
5.90
150
13.50
343
11.75
298.5
10.62
270
8.26
210
20.67
252
24.21
615
M24
8-22
10"
3.00
76
6.30
160
16.00
406
14.25
362
12.75
324
9.84
250
23.81
605
27.36
695
M24
12-25
12"
3.38
86
4.00
178
19.00
483
17.00
298.5
15.00
381
11.24
285
28.74
730
32.78
830
M27
12-25
14"
3.63
92
4.20
190
21.00
533
18.75
362
16.25
413
12.60
320
31.50
800
35.43
900
M27
12-29
16"
4.00
102
8.50
216
23.00
597
21.25
432
18.50
470
13.98
355
34.25
840
38.58
980
M30
16-29
18"
4.50
114
8.74
222
25.00
635
22.75
476
21.00
533
14.96
380
36.22
920
40.55
1030
M30
16-32
20"
5.00
127
9.00
229
27.50
399
25.00
540
23.00
584
16.34
415
39.37
1000
43.70
1110
M33
20-32
24"
6.06
154
10.50
267
32.00
813
29.50
578
27.25
692
18.70
475
45.51
1155
51.37
1305
M33
20-35
30"
6.50
165
11.50
292
38.75
985
36.00
635
33.75
857
22.38
580
54.13
1375
60.03
1525
M39
28-35
32"
7.50
190
12.50
318
41.75
1060
38.50
749.5
36.00
914
24.80
630
56.50
1435
62.40
1585
M39
28-41
36"
8.00
203
13.00
330
46.00
1168
42.75
914
40.25
1022
26.77
680
62.40
1585
69.48
1765
M20
32-41



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