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FDn — equivalent Hi-Tech RO membrane

Looking for a drop-in alternative to the Trisep (Microdyn-Nadir) FDn? HMBW-28-400 / HMBW-34-400 is the closest Hi-Tech Membranes equivalent — see how the specs line up below. The same element also replaces matching parts from 9 other manufacturers.

SpecFDnHMBW-28-400 / HMBW-34-400
Salt rejection
99.5%
99.7%Higher
Permeate flow
11,000 GPD
11,500 GPD
Test pressure
150 psi
150 psi
Element size
8″ × 40″
8" × 40"

HMBW-28-400 / HMBW-34-400 also replaces these equivalents

Cross-referenced against 50 other elements across 10 manufacturers. Every entry links to its own spec comparison.

View HMBW-28-400 / HMBW-34-400 specsView HMBW-28-400-FR / HMBW-34-400-FR specsView BW-28-400 / BW-34-400 specsAll Trisep (Microdyn-Nadir) cross-references

Trisep (Microdyn-Nadir), DuPont (FilmTec), Toray, Hydranautics (Nitto), LG Chem (NanoH2O), Koch (Separation Solutions), Veolia (formerly SUEZ), Lanxess (LewaBrane), Vontron, CSM (Toray Chemical Korea) and all model numbers shown are trademarks of their respective owners, used here for compatibility reference only. Hi-Tech Membranes is not affiliated with, endorsed by, or sponsored by any of them.