A quick opening blind for a circular opening of a pressure pipe or pressure vessel, and a mechanical device that can be quickly opened or closed, generally by a cylinder flange, a head cover, a hook or a clamp, a seal, and a safety Components such as interlocking mechanism, opening and closing mechanism, boom and short section (when required).
Combined steel body：20#, 16 Mn, JB 4726, ASTM A694 F52
Seal material: O-type circle or U-type circle , Nitrile rubber, Fluororubber
Media：Water, Gas, Oil, Non-strength corrosion chemical materials (Intensity corrosion materials should be processed with stainless steel)
DN(mm)
Interface outer diameter(mm)
Wall thickness(mm) at different pressures(Mpa)
1.6-2.5
4.0
6.4
10
16
150
159
6
8
8
8
10
168
6
8
8
8
10
200
219
8
8
8
10
14
250
273
8
8
8
10
16
300
323.9
8
8
10
12
18
325
8
8
10
12
18
350
355.6
8
8
12
14
22
377
8
8
12
14
22
400
406.4
8
10
12
16
24
426
8
10
12
16
24
450
457
8
10
14
18
28
500
508
8
10
14
20
30
529
8
10
14
20
30
550
559
10
12
16
20
32
600
610
10
12
16
22
36
630
10
12
16
22
36
650
660
10
12
18
24
38
700
711
10
14
18
26
42
720
10
14
18
26
42
750
762
12
14
20
28
-
800
813
12
16
22
30
-
920
12
16
22
30
-
850
864
12
16
22
32
-
900
920
12
16
24
32
-
950
964
12
16
24
34
-
1000
1020
12
18
26
36
-
1050
1067
14
18
26
38
-
1100
1118
14
20
28
40
-
1150
1168
14
20
30
42
-
1200
1220
14
20
30
42
-
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