LF‑U‑4040 External‑Pressure PVDF UF Membrane Module For Medium Pure‑Water Pre‑Treatment

Many medium‑size manufacturing factories adopt cheap filter media to protect downstream RO membrane element, resulting in fast membrane fouling and high maintenance expense. Our Oil Filtration Machine supporting LF‑U‑4040 UF membrane module is mature hydrophilic PVDF UF membrane from our water‑treatment catalog. Permanent‑hydrophilic hollow‑fiber of this Ultrafiltration membrane intercepts colloids, algae and suspended solids effectively and extends service life of downstream Reverse Osmosis membrane filter. This standard 4‑inch Ultrafiltration membrane module is widely‑matched pre‑treatment consumable for medium‑scale water‑systems and compatible with LF‑XULP / LF‑ULP / LF‑BW‑FR‑series RO membrane. View full water‑treatment parts at Water Filter Element. Security‑filter choose High Flow Filter Cartridge.

Pre‑Treatment Working Principle Of LF‑U‑4040 UF Membrane Module

Raw tap‑water or light brackish‑water flows outside the hollow‑fiber of LF‑U‑4040 UF membrane. The 0.01 μm pore‑size of this Ultrafiltration membrane blocks macromolecular organics, silt and plankton on outer fiber surface. Clean permeate‑water penetrates into fiber inner cavity and flows toward front‑end of RO membrane element. Regular cross‑flow backwash washes accumulated dirt away from Ultrafiltration membrane module surface, keeps stable water‑yield and reduces blocking risk of downstream RO membrane filter.

Core Performance Parameters

• Membrane Material: Modified permanent hydrophilic PVDF for UF membrane module

• Nominal Interception Precision:0.01 μm for Ultrafiltration membrane

• Single Membrane‑Area:40 ㎡ standard for UF membrane

• Max Allowable Trans‑Membrane‑Pressure:0.6 MPa

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

Each LF‑U‑4040 Ultrafiltration membrane module passes fiber‑tensile‑strength and hydrophilic‑aging‑test before delivery; matches standard pressure‑vessel with High Flow Filter Cartridge.

4 Core Advantages Of Standard 4‑Inch UF Membrane

1 Permanent Hydrophilic PVDF Material
The Ultrafiltration membrane module resists organic‑dirt adsorption and lowers cleaning frequency.

2 Stable 0.01 μm Interception Performance
Fully protect downstream RO membrane filter from colloidal blocking damage.

3 Wide Chemical‑Resistance Window
Support regular sodium‑hypochlorite back‑washing for this UF membrane.

4 Universal 4‑Inch Shell Dimension
Direct replacement for existing medium‑water‑equipment rack.

Application Scenarios

LF‑U‑4040 UF membrane module acts as standard pre‑treatment Ultrafiltration membrane for food‑factories and electronic‑workshops, installed before Reverse Osmosis membrane element to stabilize influent‑water‑quality.

Full Model List

Full Model No.	Specification Introduction
LF‑U‑4021	Small‑size lab‑grade UF membrane, small pilot‑test water‑equipment
LF‑U‑4040	Standard 4‑inch Ultrafiltration membrane module, 40㎡ membrane‑area for general raw‑water
LF‑U‑4040‑H	High‑flux modified UF membrane, higher daily water‑output for medium‑water‑station

Other Related Products

LF‑U‑8040 Large‑Flow UF Membrane Module

FAQ

Q1 Which RO membrane matches LF‑U‑4040 Ultrafiltration membrane?
A1 Compatible with LF‑XULP, LF‑ULP and LF‑BW‑FR full‑series Reverse Osmosis membrane element.

Q2 What is recommended back‑wash interval for this UF membrane module?
A2 Back‑wash every 2‑4 hours under normal raw‑water turbidity condition.

Q3 Can LF‑U‑4040 tolerate sodium‑hypochlorite chemical‑cleaning?
A3 Yes, it supports regular low‑concentration sodium‑hypochlorite online flushing.

Q4 Is LF‑U‑4040 suitable for sewage biochemical‑tank MBR process?
A4 Only for clean raw‑water pre‑treatment; sewage‑MBR need immersed‑type MBR‑series UF membrane.

Q5 What is the typical service‑life for LF‑U‑4040 Ultrafiltration membrane module?
A5 Normally 2‑3 years under qualified pre‑treatment and proper chemical‑cleaning management.