Ceramic Y-Type Partition Ring Replacement: What Must Be Matched Before Ordering?

Ceramic Y-Type Partition Ring replacement should not be specified only by nominal size and packed volume. A reliable like-for-like replacement should match the existing packing family, actual element dimensions, ceramic wall thickness, specific surface area, void fraction, dry bulk density, pieces per cubic meter, dry packing factor and ceramic material specification as closely as practical.

DAIER's catalog-confirmed Y-Type Partition Ring series includes 25, 38, 50 and 80 mm models. The data show an especially important non-linear size pattern: from 25 to 50 mm, dry packing factor decreases as size increases, but at 80 mm the trend reverses—void fraction decreases sharply and dry packing factor rises again.

Therefore:

The largest Ceramic Y-Type Partition Ring is not automatically the most open or the lowest-factor model.

For an existing tower that already performs correctly:

routine replacement should reproduce the proven model rather than “upsize” the packing automatically.

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1. Direct Answer

Before ordering replacement Ceramic Y-Type Partition Ring, confirm:

• packing family;
• nominal size;
• actual dimensions;
• wall thickness;
• specific surface area;
• void fraction;
• bulk density;
• pieces per cubic meter;
• dry packing factor;
• ceramic composition;
• packed volume;
• packed height;
• tower internal diameter;
• support-grid condition;
• reason for replacement.

For partial top-up:

match the existing Y-Type model as closely as practical.

If the proposed replacement changes:

• size;
• ceramic formulation;
• packing family;

treat it as:

a retrofit rather than a routine replacement.

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2. Catalog-Confirmed Ceramic Y-Type Partition Ring Data

These values are marked as catalog-confirmed in DAIER's engineering database. 

The table immediately reveals:

surface area, voidage, dry weight and packing factor do not move monotonically together.

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3. “50 mm Ceramic Y-Type Partition Ring” Is Still an Incomplete Specification

A buyer may request:

50 mm Ceramic Y-Type Partition Ring, 20 m³.

But the verified 50 mm model is also characterized by:

• approximately 50 × 30 × 4 mm dimensions;
• 138 m²/m³ surface area;
• 75% void fraction;
• 745 kg/m³ bulk density;
• 10,100 pcs/m³;
• 233 m⁻¹ dry packing factor. 

If another supplier's “50 mm Y-Type” differs materially from those physical properties:

do not assume it is a true like-for-like replacement.

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4. Actual Element Dimensions Matter

Y-Type Partition Ring is not simply defined by its largest width.

Representative dimensions are:

• 25 × 13 × 2 mm;
• 38 × 20 × 3 mm;
• 50 × 30 × 4 mm;
• 80 × 50 × 9 mm. 

For reverse engineering old packing, measure:

• largest outside dimension;
• element height;
• wall thickness;
• internal Y-type structure.

One number alone is not enough.

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5. Ceramic Wall Thickness Increases Strongly with Size

The listed dimensions indicate wall thickness increasing approximately:

2 → 3 → 4 → 9 mm.

The 80 mm model is therefore not simply:

a scaled-up thin-wall version of the smaller product.

Its ceramic construction changes substantially.

This affects:

• element mass;
• mechanical robustness;
• breakage behavior;
• packed-bed density.

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6. 25 → 38 mm Behaves Relatively Conventionally

At 25 mm:

• 240 m²/m³;
• 74% void;
• 760 kg/m³;
• 87,000 pcs/m³;
• 390 m⁻¹.

At 38 mm:

• 160 m²/m³;
• 75% void;
• 740 kg/m³;
• 27,600 pcs/m³;
• 260 m⁻¹. 

The larger size gives:

• lower surface area;
• slightly higher voidage;
• slightly lower bulk density;
• fewer pieces;
• lower dry packing factor.

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7. Surface Area Falls by One-Third

The change:

240 → 160 m²/m³

equals:

33.3% lower surface area.

This is already a substantial process-geometry change.

Therefore 38 mm should not automatically replace 25 mm in a proven bed.

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8. Packing Population Falls About 68%

Pieces per cubic meter:

87,000 → 27,600.

That is approximately:

68% fewer elements.

But bulk density changes only:

760 → 740 kg/m³

or about:

2.6% lower.

This is a strong reminder:

element count and bed weight are not proportional.

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9. Packing Factor Falls About One-Third

Dry packing factor:

390 → 260 m⁻¹.

Reduction:

about 33%.

At the same time void fraction rises only:

74 → 75%.

So most of the catalog hydraulic-factor change cannot be explained by:

one percentage point of voidage alone.

Geometry matters.

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10. 38 → 50 mm Produces a More Interesting Result

At 38 mm:

• 160 m²/m³;
• 75% void;
• 740 kg/m³;
• 27,600 pcs/m³;
• 260 m⁻¹.

At 50 mm:

• 138 m²/m³;
• 75% void;
• 745 kg/m³;
• 10,100 pcs/m³;
• 233 m⁻¹.

Here:

voidage stays exactly the same

while:

bulk density actually rises slightly.

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11. Larger Size Does Not Make the 50 mm Bed Lighter

Bulk density:

38 mm

740 kg/m³.

50 mm

745 kg/m³.

The larger model is approximately:

0.7% heavier per cubic meter.

The difference is small, but the direction is important.

Therefore:

larger Y-Type packing does not necessarily mean lower bulk density.

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12. Packing Population Drops About 63%

From:

27,600 → 10,100 pcs/m³.

Reduction:

approximately 63%.

Yet the bed becomes:

slightly heavier per cubic meter.

Again, fewer elements do not guarantee:

less ceramic mass.

The individual 50 mm elements are much larger and thicker.

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13. Surface Area Falls Only About 14%

From:

160 → 138 m²/m³.

Reduction:

approximately 13.8%.

This is considerably smaller than the drop in packing population.

The larger elements preserve a substantial amount of geometric area per cubic meter.

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14. Packing Factor Falls About 10%

From:

260 → 233 m⁻¹.

Reduction:

approximately 10.4%.

So 38 → 50 mm gives:

• 14% lower area;
• same voidage;
• slightly higher bed weight;
• 10% lower packing factor.

This is not a simple:

“larger = lighter + more open”

transition.

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15. 50 mm Is the Lowest-Factor Model in the Verified Series

The catalog dry packing factors are:

• 25 mm — 390;
• 38 mm — 260;
• 50 mm — 233;
• 80 mm — 262 m⁻¹. 

Therefore:

the minimum verified dry packing factor occurs at 50 mm—not at the largest 80 mm size.

That is a major replacement and size-selection boundary.

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16. 50 → 80 mm Completely Breaks the Simple Size Rule

At 50 mm:

• 138 m²/m³;
• 75% void;
• 745 kg/m³;
• 10,100 pcs/m³;
• 233 m⁻¹.

At 80 mm:

• 90 m²/m³;
• 70% void;
• 710 kg/m³;
• 1,910 pcs/m³;
• 262 m⁻¹. 

The larger model has:

• less area;
• lower void fraction;
• slightly lower bulk density;
• far fewer elements;

but:

higher dry packing factor.

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17. Void Fraction Falls by Five Percentage Points

From:

75% → 70%.

This is a major change.

It means:

the 80 mm model is substantially less open by catalog void-volume percentage than the 50 mm model.

This is the opposite of the usual intuitive expectation.

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18. 80 mm Has the Lowest Void Fraction After 25 mm

The full series is:

74 → 75 → 75 → 70%.

The 80 mm model has:

lower voidage than 25, 38 and 50 mm.

Therefore:

nominal size cannot predict void fraction in this product family.

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19. Packing Factor Rises About 12%

From:

233 → 262 m⁻¹.

Increase:

approximately 12.4%.

So moving from 50 to 80 mm produces:

a higher—not lower—catalog dry packing factor.

This is one of the strongest reasons not to “upsize” automatically during replacement.

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20. Surface Area Falls About 35%

Specific surface area:

138 → 90 m²/m³.

Reduction:

approximately 34.8%.

Therefore the 80 mm conversion loses more than one-third of the geometric surface area.

At the same time:

• voidage decreases;
• packing factor increases.

That makes 80 mm a fundamentally different packed-bed position.

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21. Packing Population Falls About 81%

Pieces per cubic meter:

10,100 → 1,910.

Reduction:

approximately 81%.

Yet bulk density falls only:

745 → 710 kg/m³

or around:

4.7%.

This is a dramatic demonstration that:

pieces/m³ are not a useful proxy for ceramic bed weight.

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22. Why Does the 80 mm Bed Stay Heavy?

The listed construction changes from:

50 mm

50 × 30 × 4 mm

to:

80 mm

80 × 50 × 9 mm.

The representative ceramic wall thickness more than doubles.

Each large element therefore contains much more ceramic.

That is why:

an 81% reduction in piece count produces less than a 5% reduction in bulk density.

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23. 80 mm Is Not a Hydraulic Upgrade over 50 mm

Based on these catalog properties:

50 mm

75% void233 m⁻¹.

80 mm

70% void262 m⁻¹.

Therefore:

80 mm should not be proposed as a routine “lower-pressure-drop upgrade” over 50 mm based solely on its larger nominal size.

Final operating pressure drop still requires real tower conditions, but the catalog trend itself does not support that simple claim.

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24. Full-Series Packing Factor Is Non-Monotonic

The trend is:

390 → 260 → 233 → 262.

Therefore:

packing factor reaches a minimum at 50 mm and then rises again.

This is a highly valuable model-selection characteristic.

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25. Full-Series Voidage Is Also Non-Monotonic

The trend is:

74 → 75 → 75 → 70%.

Again:

largest size ≠ highest voidage.

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26. Bulk Density Is Non-Monotonic Too

The sequence is:

760 → 740 → 745 → 710 kg/m³.

Notice:

38 → 50 mm increases bulk density.

Therefore even bed weight cannot be predicted simply from increasing size.

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27. Only Surface Area Declines Consistently

Surface area:

240 → 160 → 138 → 90 m²/m³.

In the verified series, larger Y-Type packing consistently provides:

lower geometric surface-area density.

This is the clearest monotonic trend in the dataset.

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28. Overall 25 → 80 mm Change Is Highly Uneven

Across the full range:

Packing population

87,000 → 1,910.

Reduction:

about 97.8%.

Surface area

240 → 90.

Reduction:

62.5%.

Bulk density

760 → 710.

Reduction:

only about 6.6%.

Dry packing factor

390 → 262.

Reduction:

about 32.8%.

Void fraction

74 → 70%.

Change:

4 percentage points lower.

These parameters clearly do not scale together.

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29. A 97.8% Reduction in Piece Count Does Not Mean a 97.8% Lighter Bed

This is especially important for procurement.

If one supplier provides:

pieces/m³

and another provides:

kg/m³

do not infer one from the other.

For Y-Type Partition Ring:

piece count almost disappears across the size range

while:

bulk density remains above 700 kg/m³.

That is because individual large ceramic elements become far heavier.

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30. Partial Top-Up Requires Strict Model Matching

For a partial bed refill:

• match Y-Type family;
• match nominal size;
• match actual dimensions;
• match wall thickness.

Do not mix:

• 38 and 50 mm;
• 50 and 80 mm;

simply because all are Y-Type Partition Rings.

The mixed packing can create:

• segregation;
• non-uniform geometry.

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31. Full-Bed Replacement Can Consider Another Size—but That Is a Retrofit

If the entire bed is removed, another Y-Type size may be evaluated.

But the 50 → 80 mm data show why this must be deliberate.

The change would produce:

• ~35% less surface area;
• 5 percentage points less voidage;
• ~12% higher dry packing factor.

Therefore:

same packing family does not mean same process duty after changing size.

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32. Ceramic Composition Must Be Verified Separately

Y-Type geometry does not establish chemical compatibility.

Confirm as relevant:

• ceramic composition;
• acid resistance;
• alkali resistance;
• operating temperature.

Do not assume:

all ceramic random packing has identical corrosion resistance.

Geometry and material are separate specifications.

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33. Breakage Requires Root-Cause Review

If the old packing shows excessive:

• fracture;
• crushing;
• chips;

review:

• ceramic quality;
• element thickness;
• loading method;
• drop height;
• support-grid condition.

The replacement specification should address:

why the original packing failed.

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34. Support Grid Must Carry Significant Ceramic Load

Using catalog bulk density, a 20 m³ dry bed would weigh approximately:

These are theoretical clean dry-packing masses before operating liquid hold-up.

Notice again:

50 mm is slightly heavier than 38 mm.

Support condition therefore needs to be checked from actual kg/m³—not assumed from size.

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35. Removed Packing Weight Is Not the Best Order Basis

Used ceramic packing may contain:

• scale;
• moisture;
• process solids;
• deposits.

Calculate the required packing volume from:

tower internal diameter and packed height.

Then check theoretical clean dry mass using:

volume × verified bulk density.

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36. Cross-Supplier Quotations Should Be Normalized

Use a table such as:

Only after this should:

USD/m³

be compared.

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Replacement Decision Table

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Common Replacement Mistakes

Assuming 80 mm Is More Open Than 50 mm

False in the verified data:

70% vs 75% voidage.

Assuming 80 mm Has Lower Packing Factor

False:

262 vs 233 m⁻¹.

Assuming Larger Size Always Means Lighter Bed

38 → 50 mm actually increases bulk density from 740 to 745 kg/m³.

Assuming Piece Count Predicts Bed Weight

25 → 80 mm pieces fall about 97.8%, while density falls only about 6.6%.

Ignoring Wall Thickness

The listed wall dimension increases from approximately 2 to 9 mm.

Treating Dry Packing Factor as Actual Pressure Drop

Real gas/liquid operating conditions are still required.

Mixing Sizes During Top-Up

This creates a mixed geometry.

Comparing Price Before Normalizing Physical Data

Two products carrying the same nominal label may not be physically equivalent.

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Frequently Asked Questions

What sizes are included in the verified Ceramic Y-Type Partition Ring series?

The referenced data include:

25, 38, 50 and 80 mm.

What is the 25 mm specification?

Approximately:

• 25 × 13 × 2 mm;
• 240 m²/m³;
• 74% void;
• 760 kg/m³;
• 87,000 pcs/m³;
• 390 m⁻¹.

What is the 38 mm specification?

Approximately:

• 38 × 20 × 3 mm;
• 160 m²/m³;
• 75% void;
• 740 kg/m³;
• 27,600 pcs/m³;
• 260 m⁻¹.

What is the 50 mm specification?

Approximately:

• 50 × 30 × 4 mm;
• 138 m²/m³;
• 75% void;
• 745 kg/m³;
• 10,100 pcs/m³;
• 233 m⁻¹.

What is the 80 mm specification?

Approximately:

• 80 × 50 × 9 mm;
• 90 m²/m³;
• 70% void;
• 710 kg/m³;
• 1,910 pcs/m³;
• 262 m⁻¹. 

Which size has the lowest dry packing factor?

Among these verified models:

50 mm at 233 m⁻¹.

Which has the highest void fraction?

The 38 and 50 mm models:

75%.

Does the 80 mm model have the highest voidage?

No. It has:

70%.

Can 80 mm directly replace 50 mm?

Do not treat it as like-for-like. The catalog data show lower surface area, lower void fraction and higher dry packing factor.

Can Y-Type Partition Ring directly replace Ceramic Cascade Mini Ring?

It may be evaluated as a retrofit alternative, but should not be treated as an identical replacement geometry.

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Selection Takeaway

Ceramic Y-Type Partition Ring replacement requires exact model matching because the size progression is strongly non-linear.

The verified series is:

25 mm → 25×13×2 / 240 m²/m³ / 74% void / 760 kg/m³ / 87,000 pcs/m³ / 390 m⁻¹

38 mm → 38×20×3 / 160 / 75% / 740 / 27,600 / 260

50 mm → 50×30×4 / 138 / 75% / 745 / 10,100 / 233

80 mm → 80×50×9 / 90 / 70% / 710 / 1,910 / 262.

Three replacement lessons are especially important.

First:

38 → 50 mm cuts pieces/m³ by about 63%, but dry bulk density actually rises slightly from 740 to 745 kg/m³.

Second:

50 mm has the lowest verified dry packing factor in the series.

Third:

50 → 80 mm increases nominal size substantially, yet void fraction falls from 75% to 70% and dry packing factor rises from 233 to 262 m⁻¹, while surface area falls by about 35%.

Across the complete 25 → 80 mm range:

• packing population falls about 97.8%;
• surface area falls 62.5%;
• dry bulk density falls only about 6.6%;
• dry packing factor falls only about 32.8% overall;
• void fraction ends 4 percentage points lower.

Therefore:

larger element size, fewer pieces, lower bed weight, higher voidage and lower packing factor are not interchangeable concepts. Each must be checked independently.

The correct replacement workflow is:

Identify Existing Y-Type Packing → Match Nominal Size → Measure Actual Dimensions → Match Wall Thickness → Compare Surface Area / Voidage / Bulk Density / Pieces / Dry Packing Factor → Confirm Ceramic Compatibility → Calculate Bed Volume → Inspect Support Grid → Normalize Supplier Quotations → Decide Like-for-Like Replacement vs Retrofit