Ductile iron outperforms malleable iron due to its better mechanical characteristics to build valve body, which is a kind of pressure containing device.
For example, it has a 20% higher tensile strength and 70 to 80% better elongation. This difference comes from different formation process of modulated graphite molecules.
KITZ ductile iron valves are made of JIS FCD-S or ASTM A395 ductile iron. The history of the introduction of ductile iron valves on the market is rather short, however, the de-mand is steadily increasing as a result of their economic advantage as well as the fact that their wide range of service applications is comparable with cast steel valves.
• Tensile strength
• Elongation
• Charpy impact value
• Yield strength
Nominal pressure
Face-to face dimensions
End connection dimensions
Port
Product Code
Nominal Size
10
15
20
25
32
40
50
65
80
100
125
150
200
3/8
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
4
5
6
8
10K
ASME B16.10
JIS B2239
FULL PORT
10STBF
 
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FULL PORT
10STLBF
 
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20K
FULL PORT
20STLB
 
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•
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10K
KITZ Standard
3 WAY
10STLB4L(T)A
 
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20K
JIS B0203
Reduced
20ST
 
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20STL
 
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Class 400
ST
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