3M CUNO High Flow Filter Cartridge Replacement (PHFM Series)
The body is 6.5″ (165 mm), not the 6″ used by most other high flow families. That detail is the whole reason this is a separate product. A 6″ element will go into a CUNO housing and will not seal against it correctly, and the result is a bypass that never presents as a leak — it presents as a downstream particle count nobody can explain.
The PHFM is a dimensional equivalent in the correct format: 40″ and 60″ lengths, 88 to 176 GPM per element, grades from 1 to 100 µm, in polypropylene, organic fibre or glass fibre.
- Micron Rating
- 1–100 µm
- Flow Rate
- 88–176 GPM
- Max Temperature
- Up to 121°C by media
- SKU
- PHFM
- Correct 6.5" (165 mm) body — the CUNO format, not a 6" substitute
- Three media — PP, organic fibre, glass fibre
- 88–176 GPM per element
- Two lengths — 40" and 60"
- Samples for qualification before a first order
- Integrity tested, cleanroom produced
- ISO 9001 with batch documentation on request
| Series | PHFM |
| Replaces | 3M CUNO high flow cartridges (dimensional equivalent) |
| Filter media | PP (deep pleated / melt) · FO (organic fibre) · GF (glass fibre / polyester) |
| Micron rating | 1–100 µm |
| Outer diameter | 6.5" (165 mm) |
| Length options | 40" · 60" |
| End cap | Confirm with factory |
| O-ring / gasket | Silicone · NBR · Viton · EPDM |
| Flow rate | 88–176 GPM |
| Max. differential pressure | PP 3.44 bar @ 82 °C · GF 3.44 bar @ 121 °C |
| Max. temperature | PP 82 °C · GF 121 °C |
| Certifications | Cleanroom production · integrity tested · ISO 9001 |
| Minimum order | 4 pieces |
| Lead time | 10 working days |
- Municipal and industrial water: high flow prefiltration.
- RO pre-treatment: membrane protection at volume.
- Process and cooling loops: side-stream filtration.
- Hot streams: glass fibre media to 121 °C.
High flow cartridge families are not dimensionally interchangeable, and the difference is small enough to be missed at goods-in.
| Family | Body diameter |
|---|---|
| Most high flow cartridges | 6" (152.4 mm) |
| 3M CUNO format — this product | 6.5" (165 mm) |
Half an inch of diameter is invisible on a pallet and decisive in a housing. An undersized element seats, the lid closes, the system runs, and a proportion of the flow goes around the element rather than through it. Nothing alarms. The only symptom is filtration performance that never matches the specification.
If a previous replacement underperformed for no apparent reason, this is the first thing worth checking.
Three media, covering the range from ordinary water duty to hot process streams.
- PP — deep pleated or melt polypropylene. The general-purpose choice, rated to 82 °C.
- FO — organic fibre, for higher dirt-holding capacity on heavily loaded streams.
- GF — glass fibre and polyester, rated to 121 °C for elevated temperature duty.
Grades run 1 to 100 µm across the range, and seals are Silicone, NBR, Viton or EPDM.
Different manufacturers' housings accept different core and adaptor arrangements, and the printed part number does not always identify which. Six items produce a same-day quote:
- Part number printed on the existing cartridge
- Housing model, if known
- Element length — 40" or 60"
- Micron grade in service
- Fluid, working temperature and flow rate per element
- Change-out interval you are getting today
A photograph of the element’s open end and adaptor answers most of it at once.
Up to two samples ship worldwide free of charge, with freight paid by the customer.
Why Choose Pullner Filter?
More than just a supplier – we’re your technical partner in filtration solutions
Laboratory and Testing Facilities
In-house testing capabilities for materials and quality assurance with advanced equipment and certified technicians.
- Particle counting analysis
- Pressure drop testing
- Material compatibility testing
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Position as technical partner, not just supplier. Custom solutions for your unique challenges.
- Custom filter design
- System optimization
- Technical consultation
Free Services
Comprehensive free services to support your filtration needs without any hidden costs.
- Free testing for filtration systems
- Free custom filtration design
- Up to 2 free samples
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State-of-the-art manufacturing facilities with worldwide delivery capabilities and local support.
- ISO 9001 certified facilities
- Global logistics network
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