Z41h-16c Dn32 Wcb Flange Type Manual High Temperature Resistant Gate Valve
The sealing principle of the gate valve is divided into, automatic sealing and forced sealing. When the cast steel gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, rely on the medium pressure to press the sealing surface of the gate to the other side of the valve seat to ensure the sealing surface, which is the automatic sealing.
|
Nominal pressure
|
1.6
|
2.5
|
4
|
6.4
|
10
|
16
|
|
Strength test
|
2.4
|
3.8
|
6
|
9.6
|
15
|
24
|
|
Water seal test
|
1.8
|
2.8
|
4.4
|
7
|
11
|
18
|
|
Upper seal test
|
1.8
|
2.8
|
4.4
|
7.04
|
11
|
18
|
|
Hermetic test
|
0.4-0.7
|
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Relative Standards
1)Design and manufacturing: GB/T12234
2)Flange connection: JB/T79
3)Face to Face: GB12221
4)Test and Inspection: JB/T9092
