Beijing Metalco Industry International Co.,Ltd
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Double orifice air valve

   

Main parts and materials

No.
Parts Name
Material
1
Sealing ring
NBR
2
Bolt
A3
3
Gasket
Asbestos
4
Bolt
A3
5
Bolt
A3
6
Bolt
A3
7
Stem
45#
8
Cover
Dutile Iron
9
Filer
Flexible Graphite
10
Stem nut
Dutile Iron
11
Cover
A3
12
Bead
Stailess Steel
13
Pin
Stailess Steel
14
Bolt
A3
15
Bolt
A3
16
Cover
Cast Iron
17
Plate
Dutile Iron
18
Ball
Stailess Steel
19
Sealing gasket
NBR
20
Body
Cast Iron
21
Plate
A3

Outline and connecting measurement

DN
D
D1
D2
H
L
b
Z–d
50
160
125
99
325
340
18
4–18
65
180
145
118
325
340
18
4-18
80
200
160
132
335
2340
19
4-18
100
220
180
156
340
340
20
8–18
150
285
240
211
395
470
22
8–18
200
340
295
266
420
470
24
12–23

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