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Pleated surface cartridges
Pleated Filter Cartridges
Pleated filter cartridges use folded media to present a much larger surface area than a depth cartridge of the same size, giving longer life at the same micron rating. They are available from 0.2 to 50 micrometres, are frequently cleanable, and can be supplied in absolute-rated constructions.
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Answer first
What Pleated Filter Cartridges Are, and How They Are Specified
Pleated filter cartridges use folded media to present a much larger surface area than a depth cartridge of the same size, giving longer life at the same micron rating. They are available from 0.2 to 50 micrometres, are frequently cleanable, and can be supplied in absolute-rated constructions.
Where a depth cartridge traps particles through its thickness, a pleated cartridge traps them on a folded surface. The pleating multiplies the effective area within the same housing envelope, which is why a pleated cartridge typically runs considerably longer than a spun cartridge at the same rating and flow.
Two things follow from that construction. Many pleated cartridges can be cleaned and returned to service, which changes the running-cost arithmetic against disposables. And because retention happens at a defined surface, pleated media supports absolute ratings in a way depth media does not.
Specification
Pleated cartridge specification
| Parameter | Typical value or range | Notes |
|---|---|---|
| Micron ratings | 0.2–50 µm | Absolute constructions available |
| Lengths | 10, 20, 30, 40 in | Must match the housing |
| Media options | Polypropylene, polyester, glass fibre, PES | Chosen on chemical compatibility |
| Surface area | Substantially higher than depth media | The source of the longer life |
| Cleanable | Often yes, media dependent | Changes cost per litre filtered |
| Rating type | Nominal or absolute | Absolute where the duty is validated |
| End caps | DOE, 222, 226, bayonet | Must match the housing exactly |
| Integrity testable | Membrane-pleated constructions | Required for sterilising duty |
Micron ratings
- Typical value or range
- 0.2–50 µm
- Notes
- Absolute constructions available
Lengths
- Typical value or range
- 10, 20, 30, 40 in
- Notes
- Must match the housing
Media options
- Typical value or range
- Polypropylene, polyester, glass fibre, PES
- Notes
- Chosen on chemical compatibility
Surface area
- Typical value or range
- Substantially higher than depth media
- Notes
- The source of the longer life
Cleanable
- Typical value or range
- Often yes, media dependent
- Notes
- Changes cost per litre filtered
Rating type
- Typical value or range
- Nominal or absolute
- Notes
- Absolute where the duty is validated
End caps
- Typical value or range
- DOE, 222, 226, bayonet
- Notes
- Must match the housing exactly
Integrity testable
- Typical value or range
- Membrane-pleated constructions
- Notes
- Required for sterilising duty
Typical values across the cartridge class. Compatibility, rating and cleaning limits follow the datasheet of the cartridge quoted.
Selection guidance
Compare on cost per litre filtered, not cost per cartridge
A pleated cartridge is several times the price of a spun cartridge at the same rating, which makes it look expensive on a purchase order. The comparison that matters is throughput before the change-out differential is reached, multiplied by whether the cartridge can be cleaned and returned.
On clean feed at low solids the spun cartridge often wins, because neither runs long enough for the area advantage to pay. On steady moderate solids loads, and particularly where changing cartridges means shutting a line down, pleated frequently wins comfortably.
Application mapping
Where Pleated Filter Cartridges Are Used
Extended-life pre-filtration
- Typical requirement
- Fewer change-outs on a continuous line
- Indicated configuration
- Pleated polypropylene at the same rating as the spun cartridge it replaces
Absolute-rated process duty
- Typical requirement
- Defined retention efficiency
- Indicated configuration
- Absolute-rated pleated cartridge with manufacturer retention data
Final filtration before packaging
- Typical requirement
- Integrity-testable barrier
- Indicated configuration
- Membrane-pleated cartridge in a sanitary housing
Replacement and consumables
Replacement Intervals and the Signs It Is Due
Intervals are indicative planning figures. The signal in the last column is what should actually trigger the change.
| Duty | Typical interval | Signs it is due |
|---|---|---|
| General pre-filtration | Longer than spun at the same rating | Differential pressure up about 1 bar from clean |
| Cleanable duty | Multiple cycles before disposal | Clean differential no longer returning to baseline after cleaning |
| Validated final filtration | Per batch or validated cycle | Failed integrity test, or end of the validated period |
General pre-filtration
- Typical interval
- Longer than spun at the same rating
- Signs it is due
- Differential pressure up about 1 bar from clean
Cleanable duty
- Typical interval
- Multiple cycles before disposal
- Signs it is due
- Clean differential no longer returning to baseline after cleaning
Validated final filtration
- Typical interval
- Per batch or validated cycle
- Signs it is due
- Failed integrity test, or end of the validated period
Indicative planning bands. Cleaning cycles and validated life follow the datasheet and, where applicable, your validation.
Put this on a standing order
Once a plant has a year of running behind it, consumption for this item is predictable. Sending the plant list and last year's usage gets it scheduled against your maintenance calendar instead of ordered in an emergency at the point the plant is already out of specification.
Commercial terms
How This Category Is Quoted
Water treatment does not have a list price, and any supplier quoting one before seeing a feed analysis is quoting a different plant from the one you need.
Pricing basis
On request, and capacity-dependent. Plant pricing moves with capacity, feed water analysis and the recovery target; membranes, cartridges and resins are quoted per element, per lot or per litre of media.
Order quantity
From a single replacement element or a case of cartridges through to full plant scope. Consumable lines are quoted per box or per lot, and the lot size is stated on the quotation.
Lead time
Confirmed per line item at quotation stage. Stocked consumable lines and made-to-order plant differ substantially, so a single blanket lead time for the category would be misleading — the quotation carries the figure for each line.
Invoicing
GST invoice against company or institutional purchase order. Proforma issued where advance payment or internal approval requires it.
Delivery coverage
Despatch from Delhi NCR across India, including plant, project and institutional sites. Delivery city and site access are asked for at enquiry because both affect despatch mode.
Documentation
Technical datasheet for the item quoted, and a test certificate where the principal supplies one with that product. Tender and institutional documentation formats are prepared on request — send the format with the enquiry so the quotation is issued in a form you can submit without rework.
Request for quotation
Request a Quote — Pleated Filter Cartridges
Fields marked with an asterisk are required. The technical fields are what usually decide whether you get a quotation on the first pass or three emails of clarification.
Frequently asked
Pleated Filter Cartridges — Common Questions
Are pleated filter cartridges better than PP spun?
They last longer at the same micron rating because of the much larger surface area, and many can be cleaned and reused. They also support absolute ratings, which depth media generally does not.
Whether they are better value depends on the duty. On light solids loads the extra cost may not be recovered; on steady loads, and where a change-out means stopping a line, they usually are.
Can pleated cartridges be washed and reused?
Many can, depending on the media and the nature of the solids. That is a significant part of their economic case against disposable depth cartridges.
Cleaning does not restore performance indefinitely. When the clean differential no longer returns toward the original baseline, the cartridge has reached the end of its useful cycles.
What end cap type do I need?
It must match your housing. Double open end (DOE) is common in industrial water duty; 222 and 226 bayonet fittings with O-rings are usual in sanitary and pharmaceutical housings.
Send the housing make and model, or the end cap of the cartridge you are replacing, with the enquiry. A correct rating in the wrong end cap will not seal, and an unsealed cartridge filters nothing.
Related Products and Categories
Specified alongside pleated filter cartridges, and the category this page sits in.
PP spun cartridges for lower-cost dutyPES membrane cartridges for pharmaCartridge filter housings and end cap typesBack to Cartridge Filters
- Delhi NCR base with pan-India supply, including plant and project sites.