Where it fits
This cartridge handles nanometre-scale final filtration of ultrapure water and aggressive process chemistries. The 20 / 30 / 50 nm ratings exist to catch residual particles that are already down in the nanometre range — and at that level, whether you hit the target often depends less on the membrane than on how long the system takes to return to baseline after a change-out.
Key characteristics
The defining design choice is shipping the element ultrapure-water pre-wet. PTFE is inherently hydrophobic and normally needs isopropanol to wet the membrane before water will pass, after which the alcohol has to be flushed out completely. Pre-wet delivery removes that whole sequence: after a change-out you go straight to flushing.
Cage, support layers and end caps are all HDPE, and metal ion extractables are 3 µg/device. Production is in a Class 1,000 cleanroom with optional Class 100 cleaning and packaging, and every cartridge is 100% integrity tested before shipment.
Choosing between options
The three PTFE cartridges differ widely in usable range — start with temperature and rating:
| Item | Hydrophilic PTFE nano (this) | Semi-grade PTFE membrane | Hydrophilic PTFE pleated |
|---|---|---|---|
| Wettability | Pre-wet, no alcohol | Naturally hydrophobic, aqueous needs wetting | Hydrophilic treated, no alcohol |
| Hardware | HDPE | PP | PP |
| Rating | 20 / 30 / 50 nm | 10 nm – 0.1 µm | 0.05 – 10 µm |
| Max temp | 40 °C | 70 °C | — |
Operation & change-out
Maximum forward ΔP is 0.4 MPa and reverse 0.3 MPa, with a 40 °C ceiling.