250Y vs 500Y Structured Packing
250Y is the most common general-purpose metal structured packing, with a specific surface of 250 m²/m³ and 2–3 theoretical plates per metre. 500Y has a specific surface of 500 m²/m³ and 4–4.5 theoretical plates per metre, so it separates more in the same height. Choose 250Y for general service and 500Y when you need the most separation in a limited height.
Side by Side
| 250Y | 500Y | |
|---|---|---|
| Specific surface | 250 m²/m³ | 500 m²/m³ |
| Theoretical plates per metre | 2–3 | 4–4.5 |
| Corrugation angle | 45° (Y type, higher efficiency) | 45° (Y type, higher efficiency) |
| Liquid load | 0.2–100 m³/m²·h | 0.2–100 m³/m²·h |
| Separation in the same height | Standard. | About twice as many plates per metre. |
| Typical choice | Most common general-purpose model. | Chosen when column height is limited and high separation is needed. |
Choose 250Y When
- You need a general-purpose structured packing.
- You want large flux and low pressure drop.
- Cost and anti-blocking performance matter.
Choose 500Y When
- You need the highest separation from a given column height.
- Your column height is limited.
- The liquid is clean enough for a finer packing.
What About X Types?
The letter in the model name gives the corrugation angle. Y (45°) is higher efficiency. X (60°) is higher capacity and lower pressure drop. The number is the specific surface in m²/m³. Our metal models run from 125Y to 500X, and non-standard packing can be made to order.
Related Terms
X and Y packing types · Specific surface area · Theoretical plate (stage) · Structured packing
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