Metal Pall Ring Sizes & Materials

Available materials include SS304, SS304L, SS316 and SS316L, with other alloys available for specific operating conditions.

16–25 mm

Higher specific surface area for smaller towers and efficiency-focused applications

38 mm

Balanced capacity and mass-transfer performance

50 mm

Common industrial choice for balanced capacity and pressure drop

76 mm

Suitable for larger towers and high-capacity applications

Metal Pall Ring Dimensions and Size Verification

Accurate dimensions are important when selecting metal Pall Rings for distillation, absorption, and stripping columns. The images show stainless steel Pall Ring samples being measured with a vernier caliper to illustrate dimensional verification.

Metal Pall Rings are available in different nominal sizes and material grades depending on column operating conditions. Before ordering, buyers should confirm the required nominal size, material, wall thickness, and quantity.

Pingxiang Daier Separation Tech Co., Ltd. supplies metal tower packing for industrial mass-transfer applications, with product specifications confirmed according to project requirements.

Bulk Metal Pall Ring Supply and Packaging

Metal Pall Rings are widely used as random tower packing in industrial gas-liquid contact processes. Their cylindrical structure, rectangular openings, and inward-bent tabs provide an open geometry designed to promote fluid contact while maintaining flow passages.

The images show bulk quantities of metal Pall Rings, including packing material collected in a woven bulk bag. Packaging arrangements may vary according to product size, order volume, and transportation requirements.

Pingxiang Daier Separation Tech Co., Ltd. supplies metal random packing for chemical processing, petrochemical operations, absorption towers, and separation equipment. Buyers can request quotations based on material grade, nominal size, wall thickness, and required quantity.

Stainless Steel Pall Ring Structure and Design Features

Stainless steel Pall Rings are cylindrical random packing elements manufactured with openings in the outer wall and inward-bent metal tabs. This design allows gas and liquid to pass through the packing bed while providing wetted surfaces for mass transfer.

The close-up images highlight the external openings, internal tabs, and cylindrical geometry of metal Pall Rings. These structural features are relevant when evaluating packing for absorption, distillation, and stripping applications.

Pingxiang Daier Separation Tech Co., Ltd. provides metal Pall Rings in different stainless steel grades and nominal sizes. Final material selection and packing specifications should be based on process temperature, chemical compatibility, hydraulic conditions, and column requirements.

What Determines the Right Metal Pall Ring for a Packed Tower?

Selecting the right Metal Pall Ring requires more than choosing a nominal ring size. Tower diameter, gas and liquid loading, allowable pressure drop, operating temperature, process chemistry and required mass-transfer performance should be evaluated together.

Smaller Pall Rings generally provide higher specific surface area and can improve gas–liquid contact, but they also create higher resistance to flow. Larger rings normally provide higher hydraulic capacity and lower pressure drop. Material selection is equally important: SS304 is widely used for general industrial service, while SS316L is preferred for more corrosive operating environments.

For new designs or replacement projects, Pingxiang DAIER recommends confirming actual tower and operating data before finalizing the ring size, material and quantity.

 

 

 

Tower Diameter & Packing Size

Tower diameter is one of the first parameters to check when selecting Metal Pall Ring size. The packing should be sufficiently smaller than the tower inside diameter so that the packed bed can maintain relatively uniform gas and liquid distribution.

Using rings that are too large for a small tower may increase wall effects and reduce effective contact between the phases. Smaller rings provide more pieces per unit volume and more surface area, but they may also increase pressure drop and packing weight.

For this reason, ring size should be selected together with tower diameter, bed height and required hydraulic capacity rather than by product size alone.

 

 

 

 

 

 

 

Data Needed for a Metal Pall Ring Recommendation

 

To recommend a suitable Metal Pall Ring size and material, please provide:

Tower inside diameter · Packing bed height · Gas flow rate · Liquid flow rate · Operating temperature · Operating pressure · Process medium · Preferred material · Existing packing size, if this is a replacement project

Pingxiang DAIER can review these operating conditions and provide a preliminary Metal Pall Ring recommendation for quotation and technical evaluation.

Gas & Liquid Load

Gas and liquid loading strongly influence the hydraulic performance of a packed tower. When gas throughput is high, larger Pall Rings are often preferred because their larger open area can reduce flow resistance and provide higher capacity.

Smaller Pall Rings may be selected when mass-transfer efficiency is more important than maximum throughput. However, the actual choice should consider gas velocity, liquid flow rate and the risk of approaching flooding conditions.

Pingxiang DAIER recommends providing both gas and liquid operating rates when requesting a size recommendation.

 

 

Pressure Drop & Capacity

Pressure drop is a key design consideration in absorbers, scrubbers, strippers and distillation columns. Smaller Metal Pall Rings usually offer greater specific surface area, but the additional contact area can increase resistance to gas flow.

Larger rings normally provide lower pressure drop and higher gas capacity. They are therefore often considered for larger towers, high-throughput service or systems where energy consumption and fan or compressor load are important.

The preferred size should balance mass-transfer efficiency, capacity and allowable pressure drop for the actual process.

 

 

 

Material & Corrosion Resistance

Metal Pall Rings are commonly manufactured from SS304, SS304L, SS316 and SS316L, with other alloys available for specific process requirements.

SS304 is suitable for many general chemical and environmental applications. SS316L provides improved corrosion resistance and is often selected when the process contains more aggressive chemicals or when corrosion control is especially important.

Material selection should be based on process composition, temperature, moisture level and expected service life. The lowest-cost material is not always the lowest-cost option over the complete operating life of the tower.

 

Metal Pall Ring FAQ – Sizes, Materials, Performance & Procurement

1. What Size Metal Pall Ring Should I Choose?

Metal Pall Rings are commonly available in nominal sizes of 16mm, 25mm, 38mm, 50mm, and 76mm.

Smaller rings generally provide greater geometric surface area per unit volume, while larger rings offer more open flow passages and may reduce flow resistance.

The appropriate size depends on column diameter, gas and liquid flow rates, separation requirements, and operating conditions.

2. SS304 vs. SS316L Metal Pall Rings: What's the Difference?

Both SS304 and SS316L are widely used for metal random tower packing.

SS316L contains molybdenum and generally offers improved resistance to certain corrosive environments compared with SS304. However, neither grade is suitable for every chemical service.

Material selection should consider process chemicals, concentration, temperature, and corrosion conditions. Buyers should confirm the required stainless steel grade before ordering.

3. Metal vs. Plastic Pall Rings: Which Is Better?

Metal Pall Rings offer good mechanical strength and are often selected for elevated-temperature applications and processes where suitable metal alloys provide the required chemical compatibility.

Plastic Pall Rings are lightweight and may be more economical in certain corrosive or lower-temperature applications.

The selection depends on operating temperature, chemical exposure, mechanical requirements, and project specifications.

4. What Wall Thickness Is Available for Metal Pall Rings?

Metal Pall Ring wall thickness varies according to nominal size, material grade, and product specification.

Wall thickness affects packing weight, mechanical strength, and material cost. Two products with the same nominal diameter may have different wall thicknesses and bulk densities.

Customers should specify the required wall thickness or provide an existing product datasheet when requesting a quotation.

5. How Much Metal Pall Ring Packing Do I Need?

Metal Pall Rings are commonly ordered by cubic meter (m³) for industrial packed towers.

The preliminary packing volume can be estimated from the column's internal cross-sectional area multiplied by the required packed-bed height, with adjustments for any relevant internal obstructions.

The total packing weight depends on the selected ring size, material, wall thickness, and bulk density.

For procurement, customers can provide the column internal diameter, packing height, and preferred ring specifications.

6. What Affects Metal Pall Ring Pressure Drop?

Pressure drop across a packed bed depends on gas velocity, liquid loading, packing size, bed height, fluid properties, and operating conditions.

Larger packing elements generally provide more open passages, but actual hydraulic performance must be evaluated for the specific process.

A fixed pressure-drop value cannot be guaranteed from nominal ring size alone.

7. Can Metal Pall Rings Replace Existing Tower Packing?

Metal Pall Rings may be considered for replacing existing Raschig Rings or other random packing during tower maintenance or modification.

However, replacement is not automatically a direct one-to-one substitution. Differences in packing geometry, hydraulic capacity, mass-transfer performance, and support arrangements must be considered.

Customers can provide existing packing dimensions, material specifications, photographs, and tower details for preliminary product comparison.

8. What Information Is Needed for a Metal Pall Ring Quotation?

For an accurate quotation, please provide:

Required nominal size: 16mm, 25mm, 38mm, 50mm, or 76mm

Material grade: SS304, SS316L, or other specified alloy

Required wall thickness

Quantity in cubic meters (m³) or kilograms (kg)

Technical drawings or specifications, if available

Destination country and preferred shipping terms

For new tower applications, operating conditions and column dimensions are also helpful.

Pingxiang Daier Separation Tech Co., Ltd. (DAIER) supplies metal Pall Rings for industrial absorption, distillation, stripping, and gas-liquid separation applications. Contact us with your specifications for a quotation.

Request a Metal Pall Ring Quote

For a faster quotation and preliminary product recommendation, please provide the Metal Pall Ring size, material, quantity and application information available for your project.

 

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