LF-UF-4040 External Pressure PVDF Ultrafiltration Membrane For Medium Pure Water Pretreatment

Many medium manufacturing plants use low-quality filter media to protect RO membrane element, resulting in frequent membrane fouling and high cleaning costs. LEFILIER LF-UF4040 standard UF membrane is mature hydrophilic PVDF UF membrane module listed in our pure water catalog, the permanent hydrophilic Ultrafiltration membrane fiber effectively intercepts colloids, algae and suspended solids, greatly extend the service life of downstream Reverse Osmosis membrane filter. This standard 4-inch Ultrafiltration membrane module is the most widely matched pre-treatment consumable for medium-scale water systems, compatible with all LF-BW and LF-ULP RO membrane series. All industrial membrane products are centralized at Water Filter Element category, oil & gas coalescer cartridge and gas filter element can be viewed via gas filter element.

Pretreatment Working Principle Of LF-UF4040 UF Membrane Module

Raw tap water or light brackish water flows outside the hollow fiber of LF-UF4040 UF membrane. The 0.01μm pore size of this Ultrafiltration membrane blocks macromolecular organics, silt and plankton on the outer fiber surface; clean permeate water penetrates into the fiber inner cavity and flows to the front of RO membrane element. Regular cross-flow backwash washes away accumulated dirt on the surface of Ultrafiltration membrane module, maintain stable water yield and reduce the blocking risk of RO membrane filter for a long time.

Core Performance Parameters

• Membrane Material: Modified hydrophilic PVDF for UF membrane module

• Nominal Interception Precision: 0.01μm for Ultrafiltration membrane

• Single Membrane Area: 40㎡ standard for UF membrane

• Max Allowable Transmembrane Pressure: 0.6MPa

• Matching Equipment: LF-BW / LF-ULP series RO membrane system

Each LF-UF4040 Ultrafiltration membrane module completes fiber tensile and hydrophilic aging test before delivery, matched with standard High Flow Filter as primary filtration.

4 Core Advantages Of Standard 4-inch UF Membrane

1 Permanent Hydrophilic PVDF Material
The Ultrafiltration membrane module is not easy to adsorb organic dirt, reduce cleaning frequency.

2 Stable 0.01μm Interception Effect
Fully protect RO membrane filter from colloidal blockage.

3 Wide Chemical Resistance Range
Tolerate conventional sodium hypochlorite backwash of this UF membrane.

4 Universal 4-inch Shell Size
Direct replacement for all mainstream medium water equipment racks.

Application Scenarios

LF-UF4040 UF membrane module is the standard pre-treatment Ultrafiltration membrane for food factories and electronic workshops, used before Reverse Osmosis membrane element to stabilize influent water quality.

Full Model List

Full Model No.	Specification Introduction
LF-UF4040-1	Standard 4-inch UF membrane, 40㎡ membrane area, conventional tap water pretreatment
LF-UF4040-2	Enhanced dirt holding Ultrafiltration membrane module, suitable for slightly turbid raw water
LF-UF4040-H	High-flux modified UF membrane, high daily water output for medium stations

Other Related Products

LF-UF8040 Large Flux UF Membrane

FAQ About LF-UF4040 UF Membrane Module

Q1 What RO membrane matches this Ultrafiltration membrane?
A1 Compatible with LF-XULP, LF-ULP and LF-BW all series Reverse Osmosis membrane element.

Q2 How often to backwash the UF membrane module?
A2 Backwash every 2–4 hours under normal raw water turbidity.

Q3 Can this Ultrafiltration membrane module resist chlorine cleaning?
A3 Support regular low-concentration sodium hypochlorite online flushing.

Q4 Is LF-UF4040 suitable for sewage treatment?
A4 Only for clean raw water pretreatment, sewage shall choose LF-MBR submerged UF membrane.