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General Specification - Technical Information<br />
Outline diMensiOn - (25MPa/40MPa)<br />
n-Ødb<br />
Ød2<br />
Ød1<br />
nb-Ødk<br />
ØW<br />
Flow Capability - (25Mpa/40Mpa)<br />
l<br />
Ød<br />
H<br />
H1<br />
50 65 80 100 125 150 200 250<br />
d 50 65 80 100 125 150 200 250<br />
d1 92 105 127 157.5 186 216 270 324<br />
d2 235 265 305 355 420 485 550 675<br />
L 398 465 530 655 800 920 1090 1310<br />
Lb 165 195 240 300 370 450 550 660<br />
H 630 745 858 1053 1285 1430 1768 1985<br />
H1 250 310 355 405 495 560 600 650<br />
W 166 208 256 256 306 358 358 418<br />
N 8 8 8 8 8 8 12 12<br />
Db 29.5 32.5 35.5 42 48 55 55 68<br />
Nb 4 4 4 4 4 4 4 4<br />
Dk 36 42 48 52 55 68 74 80<br />
Nominal Size 50 65 80 100 125 150 200 250<br />
Q(litre/min) 800 1,100 2,000 3,000 4,200 5,500 9,000 20,000<br />
Pressure drop (kPa)<br />
FlOW rate Vs. Pressure drOP<br />
900<br />
800<br />
700<br />
600<br />
500<br />
400<br />
300<br />
200<br />
100<br />
10²<br />
10³<br />
Flow rate (liter/Min)<br />
nominal Pipe size,mm<br />
50 65 80 100 125 150 200 250<br />
10⁴<br />
Flow Velocity limitation<br />
<strong>Descaling</strong> <strong>ValVes</strong><br />
allowable flow velocity in descaling<br />
piping system is generally considered<br />
as following limits.<br />
• For short to medium length within<br />
6m pipe runs : 8m/sec.<br />
• For long pipe length over 6m pipe<br />
runs : 6m/sec.<br />
• Other pipe runs except steel works<br />
descaling system : 5m/sec.<br />
7
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