PP Pleated Filter Cartridge for Process Water and Pre-RO, PPL Series

A pleated cartridge rarely fails through its media. It fails at a pinhole in a pleat fold or an incomplete seam weld, and both of those pass a visual inspection without comment. The plant that receives one finds out weeks later, as an unexplained particle count downstream with no obvious cause.

Pullner tests every PPL element for integrity before it ships. Not a sample from the batch — every element, in a cleanroom, with the record available on request. The cartridge itself is pleated polypropylene in ten grades from 0.1 to 100 µm, on a 2.7" (69 mm) body in 10", 20", 30" and 40" lengths.

Key Features

• Integrity tested per element, not per batch
• Cleanroom assembly throughout
• Ten grades from 0.1 to 100 µm on one construction
• DOE and SOE end caps — 226 and 222, fin or flat
• Four seal materials — Silicone, NBR, Viton, EPDM
• Four lengths — 10", 20", 30", 40"
• ISO 9001 with batch documentation on request

Applications

• RO pre-filtration — membrane protection ahead of the RO skid, with the grade set by the membrane supplier's pre-filtration requirement.
• Process water loops — particle control on treated water feeding production equipment.
• Treated-water polishing — a finer stage after coarser pre-filters on water treatment lines.
• Final filtration on water lines — the 0.22 and 0.45 µm grades where a validated final stage is required.

Integrity Testing

Integrity testing is the difference between a cartridge that is rated and a cartridge that is verified. A bubble point or diffusion test applies a controlled gas pressure to a wetted element and measures what passes. A pinhole shows up immediately. A sound element does not.

Most manufacturers test a sample from each batch. Pullner tests each element, records the result, and will supply those records on request. For a validated process that record is usually what the quality team needs before a supplier change is signed off, and it is the point at which most alternative suppliers cannot follow.

Ask for the integrity records with the sample rather than after it. It shortens the qualification by a cycle.

Working Temperature

The cartridge is rated to 80 °C, and its maximum differential pressure falls from 4 bar at 21 °C to 2.4 bar at 80 °C.

Polypropylene softens as it approaches its ceiling, and a pleat pack that relaxes under load loses effective surface area before it loses integrity. The symptom is a cartridge that seems to reach change-out pressure early and inconsistently, which is easy to misread as a dirty feed.

If the process genuinely runs hot and continuous, specify polyester or glass fiber instead. Both hold their geometry where PP starts to give.

Grades and Fitment

Ten grades: 0.1, 0.22, 0.45, 1, 3, 5, 10, 20, 50 and 100 µm. The 0.22 and 0.45 µm grades are specified for final filtration. Everything from 1 to 20 µm does the bulk of the work as prefiltration ahead of membranes.

End caps are DOE, or SOE in 226 and 222 patterns, fin or flat. Seals are Silicone, NBR, Viton or EPDM. Confirm the seal against the fluid separately from the element — on aggressive chemistry the seal is frequently the lower-rated of the two.

Up to two samples ship worldwide free of charge, with freight paid by the customer.

Who it is for

Water treatment engineers, system integrators and plant O&M teams running RO pre-filters and process water loops who need a second-source candidate for a 2.7" pleated polypropylene cartridge.

Typical operating conditions

• Micron rating: 0.1, 0.22, 0.45, 1, 3, 5, 10, 20, 50 or 100 µm
• Flow rate: 1–5 GPM per 10" element (suggested)
• Max differential pressure: 4 bar at 21 °C; 2.4 bar at 80 °C
• Temperature limit: 80 °C
• Size: 2.7" (69 mm) OD; 10", 20", 30" or 40" long
• End caps: DOE or SOE (226 fin, 226 flat, 222 fin, 222 flat)
• Seals: silicone, NBR, Viton, EPDM

Recommended Pullner product family

PPL series, part of Pullner's pleated filter cartridge range. For general industrial process liquids, or where the fluid calls for an FEP seal, review the PPM series (Polypropylene Pleated Water Filters) in the same family.

What to send before quotation or sample

• Fluid / media (feed water source and any treatment chemicals)
• Flow rate
• Micron rating
• Temperature
• Pressure
• Existing housing or current model
• Maintenance / change-out cycle
• Validation requirement

Minimum order: 25 pieces. Lead time: 7 working days.

Next step: Get Quote · Request Sample · Send Current Model · Ask Engineering

Is the PPL a pp pleated membrane cartridge filter?

It is a pleated polypropylene cartridge. On water lines the 0.1, 0.22 and 0.45 µm grades serve as a final filtration stage, while the coarser grades work as pre-filters ahead of RO membranes. Tell us which stage you are filling and engineering will confirm the grade.

Can the PPL replace the pleated cartridge in our RO pre-filter housing?

It is a replacement option where your housing takes a 2.7" (69 mm) OD cartridge in a 10", 20", 30" or 40" length with DOE or SOE 226 or 222 end caps. Send the current model and housing details. Engineering confirms dimensional fit first; performance is confirmed only after a sample or trial in your system.

How is it validated before we switch?

Step by step: a fit check against your housing and current model, a sample run in your system, then a trial on the live duty using your normal change-out criteria. Every PPL element is integrity-tested before shipment. Switch only once the trial meets your acceptance limits.

What documentation is available?

PPL elements are made in cleanroom production under ISO 9001, and each element is integrity-tested. Tell us which documents your quality team needs for the change file when you request a sample, and engineering will confirm what can be supplied with your order.

What are the operating limits?

The temperature limit is 80 °C. Maximum differential pressure is 4 bar at 21 °C and 2.4 bar at 80 °C, so size the stage on the hot figure if the water runs warm. Suggested flow is 1–5 GPM per 10" element. Check the seal material against any treatment chemicals in the feed.