Pentair AL6‑60B Aqualine 6 Micron High‑Flow Pleated Filter Cartridge

Pentair AL6‑60B is a nominal 6‑micron single open‑end high‑flow pleated filter cartridge, engineered for Aqualine‑series FRP horizontal filter housings and widely applied as critical security pre‑filtration consumable for industrial reverse osmosis systems. It works alongside RTM41HF050E high flow filter cartridge, and cooperates with PFTM1060UHFH13 high flow filter cartridge to deliver reliable particle interception for seawater desalination, power‑plant boiler makeup water and industrial water reuse projects. Pentair AL6‑60B adopts cross‑linked PolyForm locked‑pore gradient polypropylene pleated media, featuring 60‑inch length, 6.75‑inch outer diameter, large dirt‑holding capacity and low initial differential pressure. It effectively traps medium‑fine sediment, suspended solids and colloidal contaminants, reducing particle‑scratch and premature fouling risks for high‑cost downstream RO membrane modules. Equipped with integrated molded lifting handle and standard Buna‑N single O‑ring sealing interface, AL6‑60B supports tool‑free quick cartridge swap, cutting equipment downtime and long‑term O&M expenditure for global industrial water‑treatment sites.

Product Description

Pentair AL6‑60B is a medium‑precision model within Pentair Aqualine high‑flow filter cartridge series, designed for heavy‑duty large‑volume liquid pre‑filtration and RO membrane guard filtration scenarios. Standard dimension is 60‑inch (1524 mm) nominal length and 6.75‑inch (171.5 mm) outer diameter, adopting single open‑end (SOE) outside‑in flow configuration, removing complicated auxiliary parts such as springs and guide posts required by conventional small‑diameter filter elements.

The whole cartridge adopts full polypropylene‑based construction, including cross‑linked gradient PolyForm pleated filter media, reinforced polypropylene inner‑outer support cages, injection‑molded nylon end caps, rigid PVC central core and Buna‑N O‑ring gasket as standard sealing component. All bonding joints are finished by thermal fusion welding without adhesive addition, eliminating secondary fluid‑contamination risks caused by glue dissolution. Deep‑pleated media structure greatly expands effective filtration surface area, delivering remarkable single‑element flow capacity compared with traditional filter cartridges. Its nominal filtration rating is 6 micron, focusing on removal of medium‑fine silt, suspended particles and colloidal substances ahead of industrial RO membrane systems.

Integral molded lifting handle is built on the open‑end side, simplifying pulling‑out and installation operations during on‑site maintenance. AL6‑60B can be directly installed into original Pentair Aqualine FRP horizontal filter housings without mechanical modification. When cooperating with upstream multimedia filtration and activated carbon treatment equipment, the whole filtration system can stably maintain feed‑water SDI value below 5, satisfying strict inlet‑water technical requirements of seawater and brackish‑water reverse osmosis systems. This filter cartridge is heavily purchased by EPC contractors, water‑treatment plant operators and spare‑part distributors for new project commissioning and routine spare‑part inventory. Standard maximum continuous operating temperature reaches 54.4 °C (130 °F); customized high‑temperature resistant versions can meet higher‑temperature working‑condition demands upon request.

Working Principle

Pentair AL6‑60B operates based on outside‑in cross‑flow depth microfiltration principle. Untreated raw water flows into sealed Aqualine‑series FRP filter housing and evenly distributes toward the outer pleated surface of AL6‑60B cartridge. Driven by system operating pressure, large‑particle sediment and coarse suspended flocs are trapped on outer pleated layers, while medium‑fine particles and colloids are intercepted layer‑by‑layer through gradient cross‑linked polypropylene media from outer surface to inner core.

Purified filtrate penetrates filter media layers, converges inside rigid PVC central core and flows out toward downstream RO or UF membrane units. The gradient pore structure realizes outer‑coarse‑inner‑fine depth filtration, maximizing dirt‑holding capacity and slowing the rising speed of inlet‑outlet differential pressure. With continuous system running, intercepted pollutants keep accumulating on filter media surface. Operators must replace AL6‑60B cartridges timely when differential pressure reaches 25‑30 PSID alarm threshold, so as to restore rated water throughput and filtration performance.

All‑polypropylene material provides good chemical compatibility, tolerating most neutral aqueous solutions and conventional acid‑base cleaning agents for filter housing routine maintenance. Reinforced inner‑outer support cages effectively prevent media collapse and deformation under high‑velocity water‑flow impact, avoid fluid bypass phenomenon, and guarantee stable 6‑micron particle‑removal efficiency throughout the whole service cycle.

Technical Features

• Standard 60‑inch ×6.75‑inch dimension, single open‑end SOE structure, perfectly mechanically compatible with Pentair Aqualine FRP horizontal filter housings without modification.

• Proprietary cross‑linked PolyForm locked‑pore gradient polypropylene pleated media, nominal 6‑micron filtration rating, stable interception performance for medium‑fine silt and colloidal contaminants.

• Outside‑in flow‑path layout, concentrating captured contaminants on outer media surface and lowering fine‑particle leakage risk toward downstream membrane pipelines.

• Full thermal‑fusion‑welded manufacturing process without adhesive, eliminating hidden danger of secondary fluid contamination for industrial pure‑water scenarios.

• Optimized deep‑pleated structure brings large effective filtration area and low initial differential pressure, reducing feed‑pump operating load and long‑term system energy consumption.

• Reinforced PP inner‑outer support cages plus rigid PVC central core, anti‑collapse and anti‑deformation under high‑speed water‑flow impact.

• Integral molded lifting‑handle design, realizing tool‑free quick pull‑out and field installation, greatly shortening on‑site maintenance duration.

• Standard Buna‑N O‑ring seal; optional EPDM, silicone and fluororubber sealing materials for diversified pH, water‑quality and temperature working‑conditions.

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• Product Advantages

• 1. Ultra‑high single‑cartridge flow performance:

• greatly reduce total cartridge quantity and filter‑housing investment, saving valuable installation space for large‑scale water‑treatment plants.

• 2. Reliable 6‑micron filtration consistency:

• cross‑linked locked‑pore polypropylene media maintains stable particle‑removal efficiency during long‑time continuous system running.

• 3. Excellent dirt‑holding capability:

• gradient depth‑filtration structure extends service interval, lowers cartridge‑swap frequency and cuts manual‑maintenance workload.

• Corrosion‑resistant all‑polypropylene material, suitable for seawater, brackish water, process liquid and industrial circulating‑water filtration scenarios.

• 4. Time‑saving maintenance:

• built‑in molded handle enables fast cartridge swap, minimizing system downtime and avoiding production‑loss risk.

• Wide chemical adaptability, compatible with most neutral and moderate acid‑alkali industrial water‑treatment operating environments.

• Positive single O‑ring sealing performance, effectively preventing unfiltered‑fluid bypass inside filter‑housing cavity.

• Drop‑in interchangeable design, aftermarket replacement AL6‑60B cartridges can substitute original Pentair elements directly.

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• Application Fields

• 1. Industrial membrane pretreatment:

• 6‑micron security pre‑filtration for seawater desalination, brackish‑water reverse osmosis and ultrafiltration systems.

• 2. Power‑plant water‑treatment:

• filter consumables for boiler makeup‑water and circulating cooling‑water filtration units.

• 3. Petrochemical engineering:

• process‑liquid filtration to protect high‑value membrane separation equipment from medium‑fine‑particle damage.

• 4. Electronic manufacturing:

• pre‑filtration consumables for semiconductor ultrapure‑water production workshops.

• 5. Food & beverage industry:

• process‑water filtration and raw‑material extract purification.

• 6. Industrial wastewater recycling:

• advanced filtration consumables after biochemical treatment for industrial‑water‑resource‑recovery projects.

• 7. Municipal engineering:

• spare‑part for coastal‑island water‑supply, surface‑water purification and reclaimed‑water‑treatment facilities.

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• FAQ

Q1: What is the main application of Pentair AL6‑60B filter cartridge?

A1: AL6‑60B is nominal 6 micron high‑flow pleated filter cartridge, it is designed to remove medium‑fine silt, suspended particles and colloids, acting as security pre‑filter for RO membrane protection.

Q2: When should Pentair AL6‑60B be replaced?

A2: Replace cartridges when inlet‑outlet differential pressure reaches 25‑30 PSID, or obvious flux decline occurs. Service cycle varies from 3‑12 months depending on raw‑water quality.

Q3: Can AL6‑60B filter cartridge be cleaned and reused after fouling?

A3:  AL6‑60B pleated polypropylene cartridge belongs to disposable filter element. Heavy contamination cannot be fully recovered by chemical cleaning; media pore structure will be damaged after repeated cleaning. Replace when reaching pressure alarm threshold.

Q4: What feed‑water operating limits for AL6‑60B running in RO pre‑filtration?

A4: Recommended feed‑water SDI ≤5; remove free chlorine and strong oxidants to avoid polypropylene media oxidation damage; standard continuous operating temperature shall not exceed 54.4 °C.

Q5: Can aftermarket replacement AL6‑60B fit original Pentair Aqualine filter housings?

A5: Yes. Overall dimension, end‑cap structure, O‑ring position and single open‑end interface are fully consistent with original Aqualine standard, supporting direct plug‑and‑play installation without housing mechanical modification.

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