Pall Ring vs Intalox Saddle: Which Packing Is Better for Your Tower?
The main difference between a Pall Ring and an Intalox Saddle is geometry: a Pall Ring uses an open cylindrical structure with wall openings and internal tabs, while an Intalox Saddle uses a curved saddle-shaped geometry. Both are random tower packings designed to create gas-liquid contact, but neither is automatically better for every tower.
The correct choice depends on:
gas and liquid loading;
allowable pressure drop;
packing material;
operating temperature;
process chemistry;
fouling tendency;
tower diameter;
existing tower internals;
replacement or revamp objectives.
Pall-ring-type packing remains an established conventional random packing. Koch-Glitsch describes its FLEXIRING® equivalent as an open cylindrical packing designed to increase internal mass-transfer area and reduce flow resistance compared with older simple ring geometries.
Saddle packings are another long-established conventional random-packing family. Raschig USA continues to list both Pall Rings and Saddles as conventional packing options, demonstrating that both geometries remain commercially relevant rather than one completely replacing the other.
The useful engineering question is therefore not:
“Which packing is better?”
It is:
“Which packing gives the better balance of hydraulics, material compatibility, fouling tolerance and mass-transfer performance for this specific tower?”
1. Pall Ring vs Intalox Saddle: Quick Comparison
Factor
Pall Ring
Intalox Saddle
Basic geometry
Open cylindrical ring
Curved saddle
Packing type
Random packing
Random packing
Main flow concept
Gas and liquid pass through and around open ring
Gas and liquid pass through spaces between curved elements
Liquid-contact surfaces
Outer wall, openings and internal tabs
Curved saddle surfaces
Typical materials
Plastic, metal, ceramic
Commonly plastic and ceramic; related metal saddle designs also exist
Installation
Random loading
Random loading
Scrubber use
Common candidate
Common candidate
Absorption use
Common candidate
Common candidate
Fouling behavior
Depends strongly on size and openness
Depends strongly on size and geometry
Replacement
Widely available
Widely available
Universal winner
No
No
The practical difference is geometry, not a simple ranking of “good” versus “bad.”
2. What Is a Pall Ring?
A Pall Ring is an open cylindrical random packing.
Its wall contains openings, and portions of the wall are formed inward to create additional internal contact surfaces.
This allows gas and liquid to move:
around the packing element;
through the side openings;
through the center of the ring;
between neighboring elements.
The design evolved from simpler cylindrical packing such as Raschig Rings.
Koch-Glitsch describes Pall-ring-equivalent FLEXIRING® packing as an economical industry-standard random packing in which openings in the cylindrical wall improve use of internal surface while reducing pressure drop compared with traditional Raschig Rings.
For a complete explanation, see:
What Is Pall Ring Packing and How Does It Work?
3. What Is an Intalox Saddle?
An Intalox-type saddle is a random packing element based on a curved saddle geometry rather than a cylindrical ring.
The curved shape creates:
exposed wetting surfaces;
changing liquid-flow directions;
spaces between neighboring elements;
multiple contact and drip points.
The elements are randomly loaded into the tower and form an irregular packed bed through which gas and liquid move.
Traditional saddle packing and Pall Rings are both established conventional random-packing families. Raschig USA lists conventional Pall Rings and Saddles together and supplies them in several nominal sizes and polymer materials.
For the complete saddle-packing explanation, see:
What Is Intalox Saddle Packing? Structure, Materials and Applications
4. The Biggest Difference Is Geometry
A Pall Ring is built around an open ring concept.
An Intalox Saddle is built around a curved saddle concept.
This changes how the individual elements occupy space inside the bed.
Pall Ring
The open cylindrical structure creates direct passages through the element itself.
Its internal tabs also provide additional surfaces for liquid contact.
Intalox Saddle
The curved geometry exposes broad external surfaces and creates irregular open spaces between neighboring saddle elements.
Neither design should be evaluated simply by looking at one individual piece.
Random packing performance comes from how thousands of pieces behave together as a bed.
5. Which Has Better Gas Flow?
There is no universal answer based only on the two product names.
Gas-flow resistance depends on:
nominal size;
actual packing geometry;
open area;
void fraction;
gas velocity;
liquid loading;
fluid properties;
bed height.
Pall Rings are specifically designed with open cylindrical walls to provide less restricted vapor paths than older solid-wall ring designs.
But this does not mean every Pall Ring automatically has lower pressure drop than every saddle packing.
Two different suppliers may use different:
dimensions;
wall thickness;
openings;
surface geometry;
material.
Actual hydraulic comparison should therefore use product-specific data.
6. Which Has Lower Pressure Drop?
Do not choose between Pall Ring and Intalox Saddle using a universal pressure-drop statement.
Pressure drop is a packed-bed operating result, not simply a product label.
It changes with:
gas flow rate;
liquid flow rate;
packing size;
tower diameter;
packing bed height;
liquid properties;
gas density;
fouling condition.
For example, a large open saddle may have lower resistance than a much smaller Pall Ring.
Likewise, changing from one 50 mm packing geometry to another does not guarantee a predetermined pressure-drop reduction.
The correct procedure is:
define the operating loads → compare candidate packing data → evaluate hydraulic margin.
7. Which Provides Better Mass Transfer?
Again, neither geometry can be declared universally superior.
Mass transfer depends on the amount of effectively wetted and accessible interfacial area, not just catalogue surface area.
Important factors include:
packing surface;
liquid wetting;
gas distribution;
liquid distribution;
packing size;
fluid properties;
bed height.
Pall Rings use internal tabs and wall openings to expose additional surfaces.
Saddle packing uses curved surfaces and random orientation to create repeated liquid spreading and contact.
In a real tower, poor liquid distribution can reduce the performance of either packing.
8. Pall Ring vs Intalox Saddle for Scrubbers
Both packing families can be considered for wet gas scrubbers.
Typical scrubber duties can include:
HCl absorption;
H₂S scrubbing;
NH₃ treatment;
SO₂ absorption;
odor control;
chemical exhaust treatment.
The packing must provide sufficient gas-liquid contact while maintaining acceptable pressure drop.
For corrosive scrubber service, material selection often becomes at least as important as geometry.
A buyer should therefore compare:
packing geometry + material + size
rather than only:
Pall Ring vs Saddle.
9. Which Is Better for an H₂S Caustic Scrubber?
There is no universal answer.
For an H₂S caustic scrubber, first check:
gas flow;
H₂S concentration;
required outlet concentration;
caustic chemistry;
liquid circulation;
temperature;
solids or salt formation;
pressure-drop limit.
A Pall Ring may be a practical conventional random-packing candidate.
A saddle packing may also be suitable if its material, size and hydraulic characteristics fit the service.
If fouling or hydraulic load is severe, a different high-performance or more open random packing may deserve evaluation instead.
For this application, see:
Tower Packing for H₂S Caustic Scrubbers: What Should Be Considered?
10. Plastic Pall Ring vs Plastic Intalox Saddle
Plastic versions of both packing families are widely available.
Typical materials may include:
PP;
PE;
PVC;
CPVC;
PVDF;
specialty fluoropolymers.
Raschig USA lists conventional plastic Rings and Saddles and notes their use as established tower-packing options.
For plastic packing, the first material questions should be:
What chemicals contact the packing?
What is the normal temperature?
What is the maximum temperature?
Are oxidants present?
Are solvents or hydrocarbons present?
A PP Pall Ring and PP saddle may have similar resin compatibility but different hydraulic characteristics.
Material selection and geometry selection should therefore be treated separately.
11. Ceramic Pall Ring vs Ceramic Intalox Saddle
Ceramic random packing is often considered where:
chemical resistance is important;
operating temperature is too high for normal plastics;
an established ceramic packed-bed system is being replaced.
Both ceramic Pall Rings and ceramic saddle-type packing are available in industrial applications.
For ceramic packing, additional factors become important:
ceramic composition;
acid resistance;
alkali resistance;
water absorption;
crushing strength;
packing weight;
handling;
support-grid capacity.
Ceramic saddle packing has been widely used in corrosive chemical services, but the correct geometry still depends on tower hydraulics.
Do not choose ceramic saddle solely because the service contains acid.
12. What About Metal Packing?
Metal Pall Rings are widely used.
Metal random-packing technology also includes more advanced saddle/ring hybrid geometries.
For example, modern packing development has moved beyond traditional Pall Rings toward higher-performance designs.
Koch-Glitsch distinguishes conventional Pall-ring-equivalent FLEXIRING® packing from later high-performance random-packing families, while Sulzer similarly identifies newer random-packing geometries as developments beyond the conventional Pall Ring.
This means that for a demanding metal-packing application, the real comparison may eventually become:
Pall Ring vs high-performance random packing
rather than simply:
Pall Ring vs traditional saddle.
13. Which Is Better for Fouling Service?
Packing geometry should become more open as fouling risk becomes more serious.
Possible fouling sources include:
solids;
scale;
crystallization;
polymerization;
corrosion products;
biological material.
A very small random packing can create more restrictive passages regardless of whether it is a ring or saddle.
Therefore, when fouling is important, compare:
packing size;
minimum opening dimensions;
overall void space;
cleanability;
replacement access.
Sulzer notes that random packing can be attractive in systems involving heavy fouling or corrosion because of its ease of replacement, and its later C-Ring development specifically emphasizes improved fouling behavior.
So for severe fouling, do not limit the comparison to traditional Pall Rings and saddles.
14. Which Is Better for a Small Tower?
Packing size relative to tower diameter matters.
If individual packing elements become too large relative to the column diameter, wall effects and poor random distribution can become more significant.
For a relatively small tower, the selection may therefore favor a smaller nominal packing.
But smaller packing can also increase pressure drop.
The correct decision balances:
tower diameter + packing size + pressure drop + required efficiency.
Neither Pall Ring nor saddle geometry eliminates this trade-off.
15. Which Is Better for a Large-Diameter Tower?
A large tower creates a different problem:
liquid distribution.
As diameter increases, it becomes more important to distribute liquid uniformly over the entire bed.
A theoretically high-performance packing will not perform as intended if part of the tower remains poorly wetted.
Therefore, for large towers, compare not only the packing but also:
liquid distributor;
redistribution requirements;
bed height;
support system;
gas distribution.
The complete packed-bed system matters more than the packing name alone.
16. Which Is Easier to Install?
Both are random packing.
They are generally loaded as individual elements rather than installed in precisely oriented layers.
This gives both packing families advantages for:
replacement;
maintenance;
irregular tower access;
bulk installation.
Sulzer identifies ease of replacement as an established advantage of random packing, particularly in services where corrosion or fouling may require periodic replacement.
For ceramic packing, however, loading method must minimize breakage regardless of geometry.
17. Which Is Better for an Existing Tower Replacement?
The answer depends on the project objective.
Like-for-Like Replacement
If the tower already uses Pall Rings and operates satisfactorily:
Pall Ring → Pall Ring
may be the lowest-risk approach.
If it already uses saddle packing:
Saddle → Saddle
may likewise avoid unnecessary process changes.
Performance Upgrade
If the project objective is:
reducing pressure drop;
increasing throughput;
improving capacity;
reducing fouling;
then a different geometry can be evaluated.
But changing packing type is no longer a simple purchasing replacement.
It becomes a tower revamp decision.
18. Can Pall Rings Directly Replace Intalox Saddles?
Physically, both are random packing and may sometimes use the same packed volume.
But they should not automatically be treated as a one-to-one engineering replacement.
Changing geometry can change:
bulk density;
hydraulic resistance;
void fraction;
surface characteristics;
liquid holdup;
flooding behavior.
Before substitution, confirm:
tower ID;
packing height;
gas flow;
liquid flow;
current packing size;
current material;
existing pressure drop;
reason for replacement.
If the existing tower has performance problems, simply replacing one geometry with another without identifying the cause may not solve the problem.
19. Should You Choose by Specific Surface Area?
No.
Specific surface area is useful, but it is only one packing parameter.
Higher surface area does not automatically mean better tower performance.
A candidate packing must also provide adequate:
open area;
void fraction;
hydraulic capacity;
liquid distribution;
fouling tolerance.
The useful question is not:
Which packing has more square meters per cubic meter?
It is:
Which packing provides enough usable wetted area at an acceptable hydraulic load?
20. Should You Choose by Bulk Density?
Bulk density mainly affects:
total packing weight;
structural loading;
freight;
support-grid requirements.
It is not a direct measure of mass-transfer performance.
This becomes particularly important when comparing:
plastic;
metal;
ceramic.
A tower containing ceramic saddle packing may impose a much greater packing load than a tower containing plastic Pall Rings, even if the packed volume is identical.
Therefore, changing material may require a support review.
21. Which Is Cheaper?
Unit price depends on:
material;
nominal size;
manufacturing method;
order quantity;
packing geometry.
But price per cubic meter should not be the only selection criterion.
A cheaper packing can become more expensive if it causes:
excessive pressure drop;
insufficient capacity;
increased bed height;
frequent replacement;
fouling-related shutdowns.
Procurement should compare technically equivalent solutions before comparing final price.
22. Pall Ring vs Intalox Saddle for New Towers
For a new tower, you have more freedom.
Start with the process conditions and screen several candidate geometries.
Provide:
process duty;
gas flow;
liquid flow;
temperature;
pressure;
composition;
tower diameter if already defined;
allowable pressure drop;
fouling conditions.
Then compare the candidate packing families.
Do not begin the engineering process by assuming:
“We always use Pall Rings.”
or:
“Saddles are better for scrubbers.”
Both statements remove engineering evaluation before it begins.
23. Pall Ring vs Intalox Saddle for Retrofit Projects
Retrofit projects have additional constraints.
Check:
existing tower diameter;
existing support plate;
manway size;
available packing height;
liquid distributor;
existing pressure drop;
fan capacity;
current operating problem.
If the tower already operates near a hydraulic limitation, changing packing geometry can be useful.
If the real problem is poor liquid distribution, however, changing packing alone may provide little benefit.
This distinction is critical.
24. When Is Pall Ring a Stronger Starting Candidate?
Pall Ring is often worth screening when:
a widely available conventional random packing is desired;
open gas-flow passages are important;
several material options are required;
an existing Pall-ring bed is being replaced;
the project uses a familiar industry-standard geometry.
Pall-ring equivalents remain part of current major mass-transfer suppliers' conventional random-packing portfolios.
25. When Is Intalox Saddle a Stronger Starting Candidate?
Saddle-type packing may be worth screening when:
an existing saddle bed is being replaced;
plastic or ceramic saddle packing is already proven in the service;
curved surface geometry is preferred;
scrubbing or absorption service uses conventional random packing;
material availability favors a saddle product.
But these are screening reasons, not automatic engineering conclusions.
26. When Should You Choose Neither?
Sometimes the best answer is neither Pall Ring nor traditional saddle packing.
Consider another packing when:
pressure drop is extremely restrictive;
tower throughput must increase substantially;
severe fouling is present;
deep vacuum is involved;
very high separation efficiency is required;
existing packing is already hydraulically limiting the tower.
Modern high-performance random packing has been developed specifically to improve capacity and pressure drop beyond earlier conventional packing generations. Sulzer, for example, describes its C-Ring as an evolution of the Pall Ring intended to achieve lower pressure drop and higher capacity.
Structured packing may also deserve evaluation for suitable clean, low-pressure-drop or high-efficiency services.
27. Common Buyer Mistakes
Mistake 1 — Asking “Which One Is Better?” Without Process Data
There is no universal winner.
Mistake 2 — Comparing Only Nominal Size
Two 50 mm packings can have different hydraulic properties.
Mistake 3 — Ignoring Material
PP, PVDF, ceramic and stainless steel cannot be compared purely by geometry.
Mistake 4 — Selecting by Surface Area Alone
Usable wetted area and hydraulic capacity matter more than one catalogue number.
Mistake 5 — Selecting by Price per Cubic Meter
The cheapest packing is not necessarily the lowest-cost operating solution.
Mistake 6 — Replacing Packing Without Checking the Distributor
Poor liquid distribution can make either packing perform poorly.
Mistake 7 — Ignoring Fouling History
Existing deposits can reveal more about the required packing than the original product specification.
28. What Data Is Needed for a Real Comparison?
To compare Pall Ring vs Intalox Saddle properly, prepare:
Tower
internal diameter;
packing bed height;
number of beds;
existing internals.
Gas
gas flow rate;
temperature;
pressure;
composition.
Liquid
liquid flow rate;
temperature;
composition.
Process
absorption;
scrubbing;
stripping;
other mass-transfer duty;
required performance.
Hydraulic Constraints
allowable pressure drop;
capacity requirement;
flooding concerns.
Service Condition
corrosion;
fouling;
solids;
scale;
foaming.
Replacement Information
existing packing;
size;
material;
photographs;
manway;
support grid.
Only after these factors are known does the comparison become meaningful.
29. Pall Ring vs Intalox Saddle Selection Guide
Consider Pall Ring When:
conventional open-ring random packing is preferred;
broad material and size availability is useful;
existing Pall Rings are being replaced;
open vapor-flow paths are important;
the project already has Pall-ring hydraulic reference data.
Consider Intalox Saddle When:
an existing saddle bed is being replaced;
plastic or ceramic saddle packing fits the service;
saddle geometry has already been proven in the process;
conventional random packing is sufficient.
Consider Another Packing When:
capacity is the main constraint;
pressure drop is extremely important;
severe fouling exists;
a major debottleneck is required;
structured packing provides a better process fit.
30. Final Decision: Which Packing Is Better?
Neither Pall Ring nor Intalox Saddle is universally better.
A Pall Ring uses an open cylindrical structure.
An Intalox Saddle uses a curved saddle structure.
Both provide random gas-liquid contacting surfaces inside packed towers.
The best choice is the one that meets the actual project requirements for:
hydraulic capacity + pressure drop + mass transfer + material compatibility + fouling tolerance + tower geometry + lifecycle cost.
For a clean-sheet project, compare both using actual operating data.
For a replacement project, first determine whether the objective is:
maintenance replacementorperformance improvement.
That distinction can completely change the correct packing choice.
Pall Ring vs Intalox Saddle FAQ
Is Pall Ring better than Intalox Saddle?
Not universally.
The two packings use different geometries. Final selection depends on gas and liquid loads, material, packing size, pressure drop, fouling and tower requirements.
Which has lower pressure drop?
Pressure drop cannot be determined from the packing name alone.
Packing size, actual geometry, gas loading, liquid loading and bed height must be considered.
Which is better for a scrubber?
Both can be used as conventional random-packing candidates.
Material compatibility, gas loading, liquid distribution and fouling conditions are usually more important than choosing by product name alone.
Which is better for corrosive service?
Corrosion resistance depends primarily on material.
Plastic or ceramic versions may be considered depending on the chemistry and temperature.
Can Pall Ring replace Intalox Saddle?
Potentially, but it should not automatically be treated as a one-to-one engineering substitution.
Hydraulics, packing weight, support, liquid distribution and existing tower conditions should be reviewed.
Which packing is better for fouling?
Packing openness and size are more important than simply choosing “ring” or “saddle.”
For severe fouling, a more open high-performance packing may deserve evaluation.
Can I choose based on price?
Only after confirming that both options meet the technical requirements.
Compare packing type, material, size, hydraulic performance, documentation and total scope before comparing final price.
What should I send a supplier for selection?
Provide tower ID, packing height, gas flow, liquid flow, temperature, pressure, composition, allowable pressure drop, fouling condition and existing packing information if applicable.
Engineering Takeaway
Pall Ring vs Intalox Saddle is not a question with one universal winner.
The geometries solve the same basic engineering problem in different ways:
Pall Ring → open cylindrical flow paths and internal surfaces
Intalox Saddle → curved surfaces and open random saddle geometry
The correct selection sequence is:
define process conditions → check material compatibility → evaluate hydraulic loading → compare packing geometry and size → check fouling → verify tower internals → prepare the RFQ.
Do not select a packing because one shape “looks more efficient.”
Select it because its geometry, material and hydraulic characteristics fit the actual tower.
Need to Compare Packing for an Actual Tower?
Use the DAIER Tower Packing Engineering Assistant for preliminary screening, or provide your tower and process data for engineering review.
Prepare:
tower ID · bed height · gas flow · liquid flow · temperature · pressure · process chemistry · allowable pressure drop · fouling condition · existing packing
Pingxiang Daier Separation Tech Co., Ltd.Random Packing · Structured Packing · Tower Internals · Mist Eliminators
Preliminary engineering support · Custom manufacturing · Factory reference data · Fast technical response
Specs and test data available upon request.
Trademark note: INTALOX® is a trademark associated with Koch-Glitsch. “Intalox saddle” is used here because it is a common industry search term for saddle-type random packing; this article does not imply affiliation with or manufacture of Koch-Glitsch proprietary packing.