CV VALUE

The following chart is the flow ratio of trunnion mounted ball valve.
cv indicates the gallons of water at temperature +60°F flowing through the valve bore in
pressure differential down 1LBS/inch2 (0.0068694757MPA).

SIZE CLASS150 CLASS300 CLASS600 CLASS900 CLASS1500
2″ 500 470 400 360 360
3″ 1300 1100 1000 1000 900
4″ 2300 2200 1800 1800 1600
6″ 5400 5400 4500 4300 4000
8″ 10000 10000 8900 8400 7900
10″ 17800 17100 14500 14000 13000
12″ 26000 25000 22000 21000 19000
14″ 32000 31000 28000 26000 24000
16″ 44000 42000 39000 36000 33000
18″ 58000 56000 51000 47500 42000
20″ 75000 72000 66000 60000 52000
24″ 111200 102000 92000 86000 81000
26″ 123000 108000 98000 91000
28″ 143000 123000 12200 112000

CVI GDR TRUNNION MOUNTED BALL VALVE TORQUE

SIZE Unit CLASS 150 CLASS 300 CLASS 400 CLASS 600 CLASS 900
DN IN Formula Torque
at 20
bar
Formula Torque
at 50
bar
Formula Torque
at 64
bar
Formula Torque
at 100
bar
Formula Torque
at 150
bar
150 6 N.m 176+7.36P 355 176+7.36P 612 176+7.36P 712 176+7.36P 1008 569+9.46P 2243
200 8 415+11.6P 712 415+11.6P 1095 415+11.6P 1272 415+11.62P 2395 982+24.93P 5125
250 10 500+19.1p 970 552+25.4p 2005 552+25.4p 2396 552+25.4p 3401 1318+30.6p 6657
300 12 901+33.8p 1735 901+33.8p 2851 901+33.8p 3370 901+33.8p 4752 2384+5488p 12410
350 14 973+45p 2060 973+45p 7500 973+45p 4238 1287+61.7p 8155 2896+74.97p 16225
400 16 1582+77.3p 3441 1582+77.3p 5990 1582+77.3p 7182 1582+77.3p 11250 3789+103.4p 19000
450 18 1897+86p 3978 1897+86p 6816 1897+86p 8208 4907+97.3p 16220 4907+116.6p 25125
500 20 2385+108.8p 5017 2385+108.8p 7825 2385+108.8p 10355 5488+141.3p 23040 2385+108.8p 29965
1. This table of the torque is the valve breaking torque at maximum pressure differential, for choosing the operators.2. Formula in the table can be used to calculate the stem torques at other pressure differential. Example: calculated stem torque
of DN250, PN100 valve at 70bar pressure differential. The corresponding table can be used formula:552+25.4Xp, p=70,
Torque=2330N.m

3. 50% Safety factor should be considered when choose the actuators.

4. All the datas above are just for reference. Contact CVI engineers to get actual datas.

 

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