公称尺寸
阀体、阀盖的最小壁厚
DN
PN16
PN25
PN40
PN63
PN100
PN160
PN20
PN50
PN110
PN150
50
7.9
8.8
9.3
10.0
11.2
14.5
8.6
9.7
11.2
14.5
65
8.7
10.0
10.7
11.4
11.9
16.6
9.7
11.2
11.9
16.6
80
9.4
10.7
11.4
12.1
12.7
19.1
10.4
11.9
12.7
19.1
100
10.3
11.5
12.2
13.4
16.0
21.3
11.2
12.7
16.0
21.3
125
11.2
11.9
13.2
15.0
17.4
23.5
11.5
14.1
17.4
23.5
150
11.9
12.6
14.6
16.7
19.1
26.2
11.9
16.0
19.1
26.2
200
12.7
13.5
15.9
19.2
25.4
31.8
12.7
17.5
25.4
31.8
250
14.2
15.0
17.5
21.2
28.7
36.6
14.2
19.1
28.7
36.6
300
15.3
16.8
19.1
23.0
31.8
42.2
16.0
20.6
31.8
42.2
350
15.9
17.7
20.5
25.2
35.1
—
16.8
22.4
35.1
—
400
16.4
18.6
21.8
27.0
38.1
—
17.5
23.9
38.1
—
450
16.9
19.5
23.0
28.9
41.4
—
18.3
25.4
41.4
—
500
17.6
20.4
24.3
30.7
44.5
—
19.1
26.9
44.5
—
600
19.6
22.2
27.0
—
—
—
20.6
30.2
—
—
700
21.0
25.0
30.0
—
—
—
22.0
33.5
—
—
800
23.0
28.0
34.5
—
—
—
24.0
38.0
—
—
