Minor loss coefficients pipes
Reference data и engineering information about minor loss coefficients pipes для fluid mechanics applications.
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Overview
Minor loss coefficients ( values) for common pipe fittings, valves, and connections. Used with the equation .
Data Table
20 строк
Fitting / Component | K Value | Notes |
|---|---|---|
| 90° Elbow (long radius, flanged) | 0.2 | r/D = 1 |
| 90° Elbow (short radius, threaded) | 1.5 | r/D = 1 |
| 45° Elbow (threaded) | 0.4 | |
| 180° Return Bend (threaded) | 1.5 | |
| Tee — Line Flow | 0.9 | Threaded |
| Tee — Branch Flow | 2 | Threaded |
| Gate Valve (fully open) | 0.2 | Low loss |
| Globe Valve (fully open) | 10 | High loss |
| Ball Valve (fully open) | 0.05 | Very low loss |
| Butterfly Valve (fully open) | 0.3 | |
| Check Valve (lift type) | 12 | |
| Check Valve (swing type) | 2.5 | |
| Foot Valve with Strainer | 3 | |
| Pipe Entrance (sharp) | 0.5 | |
| Pipe Entrance (rounded, r/D>0.15) | 0.04 | Well-rounded |
| Pipe Exit | 1 | All conditions |
| Sudden Expansion (A₂/A₁=0.5) | 0.75 | Based on v₁ |
| Sudden Contraction (A₂/A₁=0.5) | 0.375 | Based on v₂ |
| Diaphragm Valve (fully open) | 2.3 | |
| Plug Valve (fully open) | 0.1 |
Источник: engineeringtoolbox.com
Notes
- Values are at standard conditions unless otherwise noted
- Always verify values for critical applications