Tray Column Design: sieve to dual_flow
Distillation and absorption tray column design parameters — sieve, valve, bubble cap, and dual-flow tray geometry, hydraulics, flood limits, and turndown ratios
| tray type | approach to flood pct (%) | capacity factor ft s (ft/s) | downcomer area frac max (dimensionless) | downcomer area frac min (dimensionless) | hole area to active area max (dimensionless) | hole area to active area min (dimensionless) | hole dia in max (in) | hole dia in min (in) | hole dia typical in (in) | notes | system factor (dimensionless) | tray spacing in max (in) | tray spacing in min (in) | turndown ratio (dimensionless) | weir height in max (in) | weir height in min (in) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| sieve | 70 | 1 | 0.15 | 0.07 | 0.15 | 0.05 | 1 | 0.1875 | 0.5 | Sieve trays: perforated plate; preferred for clean non-foaming systems; Ah/Aa 0.05-0.15 typical; standard hole diameter 0.5 in. Approach to flood at design = 70-80%. Turndown ~2:1 before weeping. | 1 | 24 | 18 | 2 | 3 | 1.5 |
| valve | 75 | 1.1 | 0.15 | 0.07 | 0.14 | 0.08 | 0.1875 | 0.1875 | 0.1875 | Valve trays: floating or fixed disk caps; better turndown than sieve (4:1); Ah/Aa uses slot area; valve opening 0.1875 in orifice. System factor 1.0 for clean systems. Slightly higher capacity than sieve. | 1 | 24 | 18 | 4 | 2.5 | 1.5 |
This is a sample. Search the full tray column design dataset and 300+ more by creating a free account and accessing the database.
Get started for FREE