Asymmetric PES Membrane Filter Element, HFPS Series

A symmetric membrane has the same pore size through its whole thickness, so the upstream face does all the retaining and blinds first. An asymmetric PES membrane is graded: more open on the upstream side and tightest at the rated layer. Larger particles are held in the open structure and never reach the rated layer, which is why an asymmetric membrane carries more load before flow falls off.

The HFPS element pleats that membrane into a 2.7" (69 mm) body in 5", 10", 20", 30" and 40" lengths, with DOE or SOE end caps in 226 and 222 fin or flat patterns and silicone, NBR, Viton or EPDM seals. Ratings run from 0.02 to 10 µm, and flow ranges from 1 to 50 GPM. Elements are produced in a cleanroom, integrity-tested and made under ISO 9001. Pullner tests membranes in-house on an SEM resolving to 3 nm.

Use HFPS as a final or near-final membrane stage, after pleated polypropylene pre-filters from the pleated filter cartridge range have removed the bulk load. The pre-filter protects the membrane; the membrane sets the final rating. For other membrane options, see Pullner's membrane filter cartridge family.

Key Features

• Asymmetric PES membrane — graded pore structure, tightest at the rated layer.
• Ratings 0.02–10 µm — for final and near-final membrane stages.
• Flow 1–50 GPM — confirm the figure for your rating and length with engineering.
• Standard body — 2.7" (69 mm) OD in 5", 10", 20", 30" and 40" lengths.
• Standard fitment — DOE or SOE end caps (226 fin, 226 flat, 222 fin, 222 flat); silicone, NBR, Viton or EPDM seals.
• Integrity-tested — cleanroom production under ISO 9001.

Applications

• High-purity water — final filtration at the point of use.
• Process water — a final membrane stage after pleated pre-filtration.
• Pharmaceutical liquids — final filtration on validated process lines.
• Food and beverage liquids — final membrane stage after pre-filtration.
• Disinfectant solutions — final membrane filtration of the made-up solution.

Who it is for

Water treatment, pharmaceutical and food and beverage engineers specifying a final membrane stage, and system integrators building membrane stages into water and process skids.

Typical operating conditions

• Micron rating: 0.02–10 µm
• Media: asymmetric PES membrane, pleated
• Flow rate: 1–50 GPM
• Max differential pressure: 4 bar at 21 °C; 2.4 bar at 80 °C
• Temperature limit: 80 °C
• Size: 2.7" (69 mm) OD; 5", 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

HFPS series, part of Pullner's membrane filter cartridge family, normally installed after a pleated polypropylene pre-filter stage.

What to send before quotation or sample

• Fluid / media (including pH and any cleaning or sanitizing chemicals)
• Flow rate
• Micron rating
• Temperature
• Pressure
• Existing housing or current model
• Maintenance / change-out cycle
• Validation requirement

Minimum order: 4 pieces. Lead time: 15 working days.

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

What is an asymmetric filter membrane?

A membrane whose pore size changes through its thickness: open on the upstream side, tightest at the rated layer. Larger particles are held in the open structure, so the rated layer loads more slowly than on a symmetric membrane, where the upstream face does all the work and blinds first.

Can HFPS replace the PES membrane cartridge we use now?

It is a replacement option where the housing takes a 2.7" (69 mm) OD element, 5" to 40" long, with DOE or SOE 226 or 222 end caps. Send the current model and rating. Dimensional fit is confirmed first; performance only after a sample and a trial on your process.

How is it validated before we switch?

A fit check, a sample, then a trial on your fluid against your acceptance limits. If your process requires a sterilizing-grade claim or other regulated performance, raise it at inquiry: engineering will confirm what data exists before a sample ships.

What data or documentation is available?

HFPS elements are produced in a cleanroom under ISO 9001 and integrity-tested, and Pullner tests membranes in-house on an SEM resolving to 3 nm. Name the documents your quality team needs when you request a sample, and engineering will confirm what can be supplied.

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. Flow is 1–50 GPM depending on configuration. Send the fluid, pH and any cleaning chemicals so engineering can confirm chemical compatibility for membrane and seal.