一个“8盲”或“奇观盲”是一种管道配件，用于提供积极的隔离．
如图所示，一个眼罩基本上是由两个金属圆盘通过一条金属条相互连接而成。一个是实心圆盘，另一个是空心的。中空的阀瓣允许流体流动，固体阀瓣用于积极隔离。您可以简单地将眼镜盲板旋转180度来关闭或打开管道，让液体通过。
标准尺寸的眼镜百叶窗或8百叶窗
眼镜百叶窗的标准尺寸见英寸。他们和你一样ASME B16.48．
|
管 大小 |
150 # 法兰 |
|||||
|
一个
|
B
|
C
|
D
|
E
|
F
|
|
|
1/2 "
|
5／8
|
1-3/4
|
2-3/8
|
5／8
|
1 - 1/2
|
1／4
|
|
3/4＂
|
13/16
|
2-1/8
|
4
|
5／8
|
1 - 1/2
|
1／4
|
|
1”
|
1-1/8
|
2 - 1/2
|
3-1/8
|
9/16
|
1 - 1/2
|
1／4
|
|
1 1/4”
|
1-5/8
|
2-7/8
|
3 - 1/2
|
9/16
|
1 - 1/2
|
1／4
|
|
1 - 1/2”
|
1-7/8
|
3-1/4
|
3-7/8
|
9/16
|
1 - 1/2
|
1／4
|
|
2＂
|
2-3/8
|
4
|
4-3/4
|
11/16
|
2
|
1／4
|
|
2 - 1/2 "
|
2-7/8
|
4-3/4
|
半
|
11/16
|
2
|
1／4
|
|
3”
|
3 - 1/2
|
5-1/4
|
6
|
11/16
|
2 - 1/2
|
1／4
|
|
3 - 1/2”
|
4
|
6-1/4
|
7
|
3／4
|
2 - 1/2
|
3／8
|
|
4＂
|
4 1/2
|
6-3/4
|
5
|
3／4
|
2 - 1/2
|
3／8
|
|
5”
|
5-9/16
|
7-5/8
|
份81/2
|
7／8
|
3.
|
3／8
|
|
6”
|
6-5/8
|
8-5/8
|
九个半
|
7／8
|
3.
|
1／2
|
|
8”
|
8-5/8
|
10-7/8
|
11-3/4
|
7／8
|
3.
|
1／2
|
|
10＂
|
10-3/4
|
13-1/4
|
14-1/4
|
1
|
4
|
5／8
|
|
12 "
|
12-3/4
|
16
|
17
|
1
|
4
|
3／4
|
|
14”
|
14
|
17-5/8
|
18-3/4
|
1-1/8
|
4-1/4
|
3／4
|
|
16“
|
16
|
20-1/8
|
21-1/4
|
1-1/8
|
4-1/4
|
7／8
|
|
18”
|
18
|
21-1/2
|
22-3/4
|
1 1/4
|
4 1/2
|
1
|
|
20”
|
20.
|
距离
|
25
|
1 1/4
|
4-3/4
|
1-1/8
|
|
24＂
|
24
|
28-1/8
|
29又1/2
|
1-3/8
|
半
|
1 1/4
|
|
管 大小 |
300 # 法兰 |
|||||
|
一个
|
B
|
C
|
D
|
E
|
F
|
|
|
1/2 "
|
5／8
|
2
|
2-5/8
|
5／8
|
1 - 1/2
|
1／4
|
|
3/4＂
|
13/16
|
2 - 1/2
|
3-1/4
|
3／4
|
1 - 1/2
|
1／4
|
|
1”
|
1-1/8
|
4
|
3 - 1/2
|
11/16
|
1 - 1/2
|
1／4
|
|
1 1/4”
|
1-5/8
|
3-1/8
|
3-7/8
|
11/16
|
1 - 1/2
|
1／4
|
|
1 - 1/2”
|
1-7/8
|
3-5/8
|
4 1/2
|
7／8
|
2
|
1／4
|
|
2＂
|
2-3/8
|
4-1/4
|
5
|
3／4
|
2
|
3／8
|
|
2 - 1/2 "
|
2-7/8
|
5
|
5-7/8
|
7／8
|
2 - 1/2
|
3／8
|
|
3”
|
3 - 1/2
|
5-3/4
|
6-5/8
|
7／8
|
2 - 1/2
|
3／8
|
|
3 - 1/2”
|
4
|
6-3/8
|
7-1/4
|
7／8
|
2 - 1/2
|
1／2
|
|
4＂
|
4 1/2
|
7
|
7-7/8
|
7／8
|
2 - 1/2
|
1／2
|
|
5”
|
5-5/8
|
8-3/8
|
9-1/4
|
7／8
|
3.
|
5／8
|
|
6”
|
6-5/8
|
九又四分之三
|
10-5/8
|
7／8
|
3.
|
5／8
|
|
8”
|
8-5/8
|
12
|
13
|
1
|
3 - 1/2
|
7／8
|
|
10＂
|
10-3/4
|
14-1/8
|
15-1/4
|
1-1/8
|
4
|
1
|
|
12 "
|
12-3/4
|
16-1/2
|
17-3/4
|
1 1/4
|
4
|
1-1/8
|
|
14”
|
14
|
19
|
20-1/4
|
1 1/4
|
4-3/4
|
1 1/4
|
|
16“
|
16
|
21-1/8
|
22-1/2
|
1-3/8
|
4-7/8
|
1 - 1/2
|
|
18”
|
18
|
23-3/8
|
24-3/4
|
1-3/8
|
4 1/2
|
1-5/8
|
|
20”
|
20.
|
25-5/8
|
27
|
1-3/8
|
4-3/4
|
1-3/4
|
|
24＂
|
24
|
30-3/8
|
32
|
1-5/8
|
半
|
2
|
|
管 大小 |
600 # 法兰 |
|||||
|
一个
|
B
|
C
|
D
|
E
|
F
|
|
|
1/2 "
|
5／8
|
2
|
2-5/8
|
5／8
|
1 - 1/2
|
1／4
|
|
3/4＂
|
13/16
|
2 - 1/2
|
3-1/4
|
3／4
|
1 - 1/2
|
1／4
|
|
1”
|
1-1/8
|
4
|
3 - 1/2
|
3／4
|
2
|
1／4
|
|
1 1/4”
|
1-7/16
|
3-1/8
|
3-7/8
|
3／4
|
2
|
3／8
|
|
1 - 1/2”
|
1-11/16
|
3-5/8
|
4 1/2
|
7／8
|
2-5/8
|
3／8
|
|
2＂
|
2-1/8
|
4-1/4
|
5
|
3／4
|
2
|
3／8
|
|
2 - 1/2 "
|
2-5/8
|
5
|
5-7/8
|
7／8
|
2-5/8
|
1／2
|
|
3”
|
3-1/4
|
5-3/4
|
6-5/8
|
7／8
|
2-5/8
|
1／2
|
|
3 - 1/2”
|
3-3/4
|
6-1/4
|
7-1/4
|
1
|
3.
|
5／8
|
|
4＂
|
4-1/4
|
5
|
份81/2
|
1
|
3.
|
5／8
|
|
5”
|
5-1/4
|
9-3/8
|
10 1/2
|
1-1/8
|
3-3/8
|
3／4
|
|
6”
|
6-3/8
|
10-3/8
|
已经降至11
|
1-1/8
|
3-3/8
|
7／8
|
|
8”
|
8-3/8
|
12-1/2
|
13-3/4
|
1 1/4
|
3-3/4
|
1-1/8
|
|
10＂
|
10-7/16
|
15-5/8
|
17
|
1-3/8
|
4-1/8
|
1-3/8
|
|
12 "
|
12-3/8
|
17-7/8
|
19-1/4
|
1-3/8
|
4-1/8
|
1-5/8
|
|
14”
|
13-5/8
|
19-1/4
|
20-3/4
|
1 - 1/2
|
4 1/2
|
1-3/4
|
|
16“
|
15-5/8
|
22-1/8
|
距离
|
1-5/8
|
4-7/8
|
2
|
|
18”
|
17-5/8
|
24
|
25-3/4
|
1-3/4
|
5-1/4
|
2-1/8
|
|
20”
|
19-5/16
|
26-3/4
|
28-1/2
|
1-3/4
|
5-1/4
|
2 - 1/2
|
|
24＂
|
23-1/2
|
31
|
33
|
2
|
6
|
2-7/8
|
|
管 大小 |
900 # 法兰 |
|||||
|
一个
|
B
|
C
|
D
|
E
|
F
|
|
|
1/2 "
|
0.625
|
2.375
|
3.25
|
-
|
1.50
|
1／4
|
|
3/4＂
|
0.0825
|
2.625
|
3．50
|
0.875
|
1.625
|
1／4
|
|
1”
|
１．０５
|
3．0
|
4．0
|
1．0
|
2.25
|
1／4
|
|
1 1/4”
|
1.44
|
3.375
|
4.375
|
1．0
|
2.25
|
3／8
|
|
1 - 1/2”
|
1.68
|
3．5
|
4.875
|
1.125
|
2.625
|
3／8
|
|
2＂
|
2.16
|
5．5
|
6.5
|
1．0
|
2.25
|
1／2
|
|
2 - 1/2 "
|
2.64
|
6.375
|
7．5
|
1.125
|
2.625
|
1／2
|
|
3”
|
3.25
|
6.5
|
7．5
|
1．0
|
2.625
|
5／8
|
|
4＂
|
4.25
|
8．0
|
9.25
|
1．25
|
3．0
|
3／4
|
|
5”
|
5．3
|
9.625
|
11.0
|
1.375
|
3.375
|
7／8
|
|
6”
|
6.36
|
11.25
|
12．5
|
1．25
|
3.375
|
1
|
|
8”
|
8.33
|
14.0
|
15.5
|
1．5
|
3.75
|
1-3/8
|
|
10＂
|
10.42
|
17.0
|
18.5
|
1．5
|
4.125
|
1-5/8
|
|
12 "
|
12.39
|
19．5
|
21.0
|
1．5
|
4.125
|
1-7/8
|
|
14”
|
13.62
|
20.375
|
22.0
|
1.625
|
4．5
|
2-1/8
|
|
16“
|
15.62
|
22.5
|
24.25
|
1.75
|
4.875
|
2-3/8
|
|
18”
|
17.62
|
25.0
|
27.0
|
2．0
|
5.25
|
2-5/8
|
|
20”
|
19.56
|
27.375
|
29.5
|
2.125
|
5.25
|
2-7/8
|
|
24＂
|
23.5
|
32.875
|
35.5
|
2.625
|
6．0
|
3 - 1/2
|
|
管 大小 |
1500 # 法兰 |
|||||
|
一个
|
B
|
C
|
D
|
E
|
F
|
|
|
1/2 "
|
0.625
|
2.375
|
3.25
|
-
|
1.50
|
1／4
|
|
3/4＂
|
0.82
|
2.625
|
3．50
|
0.875
|
1.625
|
3／8
|
|
1”
|
１．０５
|
3．0
|
4．0
|
1．0
|
2．5
|
3／8
|
|
1 1/4”
|
1.375
|
3.375
|
4.375
|
1．0
|
2．5
|
3／8
|
|
1 - 1/2”
|
1.61
|
3.75
|
4.875
|
1.125
|
2.75
|
1／2
|
|
2＂
|
2.07
|
5．5
|
6.5
|
1．0
|
2.75
|
1／2
|
|
2 - 1/2 "
|
2.47
|
6.375
|
7．5
|
1.125
|
3．0
|
5／8
|
|
3”
|
3.07
|
6.75
|
8．0
|
1．25
|
3．0
|
3／4
|
|
4＂
|
4.03
|
8.125
|
9．5
|
1.375
|
3．5
|
7／8
|
|
5”
|
5.05
|
9.875
|
11．5
|
1.625
|
3．5
|
1-1/8
|
|
6”
|
6.06
|
11.0
|
12．5
|
1．5
|
3．5
|
1-3/8
|
|
8”
|
7.98
|
13.75
|
15.5
|
1.75
|
4．0
|
1-5/8
|
|
10＂
|
10.02
|
17.0
|
19.0
|
2．0
|
4．5
|
2
|
|
12 "
|
11.94
|
20.375
|
22.5
|
2.125
|
4．5
|
2-3/8
|
|
14”
|
13.12
|
22.625
|
25.0
|
2.375
|
5．0
|
2-5/8
|
|
16“
|
15.0
|
25.125
|
27.75
|
2.625
|
5.25
|
3.
|
|
18”
|
16.88
|
27.625
|
30.5
|
2.875
|
5.75
|
3-3/8
|
|
20”
|
18.81
|
29.625
|
32.75
|
3.125
|
6．0
|
3-3/4
|
|
24＂
|
22.62
|
35.375
|
39.0
|
3.625
|
7．0
|
4-3/8
|
|
管 大小 |
2500 # 法兰 |
|||||
|
一个
|
B
|
C
|
D
|
E
|
F
|
|
|
1/2 "
|
0.625
|
2.625
|
3．5
|
-
|
1.50
|
3／8
|
|
3/4＂
|
0.82
|
2.875
|
3.75
|
0.875
|
1.625
|
3／8
|
|
1”
|
１．０５
|
3.25
|
4.25
|
1．0
|
2．5
|
3／8
|
|
1 1/4”
|
1.38
|
4．0
|
5.125
|
1.125
|
2．5
|
1／2
|
|
1 - 1/2”
|
1.61
|
4．5
|
5.75
|
1．25
|
2.75
|
5／8
|
|
2＂
|
2.07
|
5.625
|
6.75
|
1.125
|
2.75
|
5／8
|
|
2 - 1/2 "
|
2.47
|
6.5
|
7.75
|
1．25
|
3．0
|
3／4
|
|
3”
|
3.07
|
7.625
|
9.0
|
1.375
|
3．0
|
7／8
|
|
4＂
|
4.03
|
9.125
|
10.75
|
1.625
|
3．5
|
1-1/8
|
|
5”
|
5.05
|
10.875
|
12.75
|
1.875
|
3．5
|
1-3/8
|
|
6”
|
6.06
|
12.375
|
14.5
|
2.125
|
3．5
|
2
|
|
8”
|
7.81
|
15.125
|
17.25
|
2.125
|
4．0
|
2-1/8
|
|
10＂
|
9.75
|
18.625
|
21.25
|
2.625
|
4．5
|
2-5/8
|
|
12 "
|
11.37
|
21.5
|
24.375
|
2.875
|
4．5
|
3-1/8
|
