A large number of water station operators ignore complete ultrafiltration pretreatment, leading to irreversible scratch and severe biological fouling on expensive RO membrane surfaces. Ordinary multi-media filters and security cartridges can only trap large sand grains, failing to intercept nano-scale colloids, algae and microorganisms, which quickly form dense biofilm and shorten RO service life by over half. Our PVDF external pressure hollow fiber UF membrane adopts super hydrophilic modified raw material with 0.01μm filtration precision, removing over 99% colloids, bacteria and suspended micro-particles, stably controlling inlet SDI below 3 for all LF XULP/ULP/BW/BW-FR/SW RO membrane models. Outstanding chlorine resistance tolerates 5000ppm sodium hypochlorite high-concentration backwashing without fiber fracture.
Complete PVDF external pressure ultrafiltration specifications and matched full-series RO membrane elements are listed in our water filter element.
Core Product Parameters & Series
1. LF-UF-4046W: Membrane area 6.0㎡, designed flux 50–100 L/h/㎡
2. LF-UF-6060W: Membrane area 33㎡, designed flux 50–100 L/h/㎡
3. LF-UF-8060W: Membrane area 34.9㎡, designed flux 50–100 L/h/㎡
4. LF-UF-2880W: Membrane area 55㎡, designed flux 50–100 L/h/㎡
5. LF-UF-1060W: Membrane area 75㎡, designed flux 50–100 L/h/㎡
Material: Modified PVDF hollow fiber, molecular weight cutoff 100,000 Dalton
Main Application Scenarios
1. Full LF RO membrane system front-end protective pretreatment
2. Oilfield oily produced water solid-liquid separation treatment
3. Municipal sewage reuse pre-filtration process section
4. Power plant circulating cooling water turbidity reduction equipment
5. Printing & dyeing high organic wastewater primary filtration
6. Seawater desalination multi-stage pretreatment system
Key Performance Advantages
1. Super hydrophilic fiber resists oil and organic pollutant adhesion
2. Ultra-high tensile strength avoids breakage under heavy backwash flow
3. Excellent oxidation resistance tolerates long-term oxidant cleaning
4. Automatic online backwashing drastically cuts manual maintenance labor
5. Customizable membrane area matches all tonnage industrial RO membrane systems
6. Compatible with all mainstream high-flow security filter cartridges
Our technical standard water treatment process: Raw water → Multimedia filter → PVDF external pressure UF membrane → 5μm high-flow filter → High-pressure pump → RO membrane. This two-stage graded filtration thoroughly solves particle scratch and biological fouling two major RO failure problems.
If you are interested in our membrane solutions, please contact us.
