Product Overview
The pneumatic centerline butterfly valve is composed of a centerline butterfly valve and a pneumatic actuator. The midline soft seal butterfly valve is a conventional butterfly valve preferred for pipelines, which has a simple structure, small flow resistance coefficient, and the flow characteristics tend to be straight, and will not retain debris. And it has the advantages of light weight, easy installation and small driving torque. This kind of valve can be used not only for cutting off the medium, but also for adjusting the flow of the medium. According to the user's requirements, the drive device can be manual, electric, pneumatic and other methods. The selection of parts of different materials and the use of sealing rings of different materials can adapt to different media and working conditions, so that the cost and performance can achieve the effect.
Main component materials
|
Part name |
Main material |
|
Valve body |
Ductile steel, cast steel, alloy steel, stainless steel |
|
Butterfly plates |
Gray cast iron, ductile steel, cast steel, stainless steel and special materials |
|
Seals |
All kinds of rubber, PTFE |
|
Stem |
2Cr13, stainless steel |
|
stuffing |
O-rings, flexible graphite |
Main technical parameters:
|
Nominal diameter |
DN（mm） |
50～1000 |
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|
Nominal pressure |
PN（MPa） |
0.6 |
1.0 |
1.6 |
|
Test pressure |
Strength test |
0.9 |
1.5 |
2.4 |
|
Seal test |
0.66 |
1.1 |
1.76 |
|
|
Hermetically sealed test |
0.6 |
0.6 |
0.6 |
|
|
Applicable media |
Air, water, sewage, steam, gas, oil, etc. |
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|
Drive form |
Pneumatic transmission |
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Connection Size (mm)
|
Nominal DN |
50 |
65 |
80 |
100 |
15 |
10 |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
600 |
700 |
800 |
900 |
1000 |
|
Flow coefficient (Kv) |
110 |
180 |
232 |
368 |
55 |
75 |
1240 |
2025 |
2712 |
3875 |
5038 |
6330 |
7755 |
11886 |
15375 |
19380 |
25695 |
31365 |
|
Range of motion |
0－90° |
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The permissible differential pressure ΔP |
Less than nominal pressure (1.6MPa) |
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The amount of leakage |
Press GB/T4213-92, 10-4 of kV value |
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|
Fundamental error |
±2.5% with locator |
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|
Return |
2.5% with locator |
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Dead zone |
1% with locator |
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Ambient temperature |
-20℃~+90℃ |
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