This is a sample of theControl valve sizing calculator. To access the working calculator, pleasesign up for free membership trial.
The control valve sizingcalculator givenhere can be used to estimate theflow coefficientororifice coefficientofthe valve. This flow coefficient for a valve depends on type of valve, pressure & flow conditions and desiredinherent characteristicof the valve.
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The table given below, provides valve specific factors for a variety of valves.
| Valve type | Trim Type | Cf | XT |
| Globe, single port | 3 V-port plug | 0.9 | 0.7 |
| 4 V-port plug | 0.9 | 0.7 | |
| 6 V-port plug | 0.9 | 0.7 | |
| Contoured plug | 0.9 | 0.72 | |
| 60 diameter hole drilled cage | 0.9 | 0.68 | |
| 120 equal diameter hole drilled cage | 0.9 | 0.68 | |
| Characterized cage, 4 port | 0.9 | 0.75 | |
| Globe, double port | Ported Plug | 0.9 | 0.75 |
| Contoured plug | 0.85 | 0.7 | |
| Globe, angle | Contoured plug | 0.9 | 0.72 |
| Characterized cage, 4 port | 0.9 | 0.65 | |
| Venturi | 0.85 | 0.6 | |
| Globe, small flow trim | V-notch | 0.98 | 0.84 |
| Flat seat | 0.85 | 0.7 | |
| Tapered needle | 0.95 | 0.84 | |
| Rotary | Eccentric spherical plug | 0.85 | 0.6 |
| Eccentric conical plug | 0.77 | 0.54 | |
| Butterfly (centered shaft) | Swing-through (70 °) | 0.62 | 0.35 |
| Swing-through (60 °) | 0.7 | 0.42 | |
| Fluted vane (70 °) | 0.67 | 0.38 | |
| 高性能蝴蝶(eccentric shaft) | Offset seat (70 °) | 0.67 | 0.35 |
| 球 | Full bore (70 °) | 0.74 | 0.42 |
| Segmented ball | 0.6 | 0.3 |
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