PES Ultrafiltration Membrane

FiltMem PES series widely used in water purification of water plants, seawater desalination pretreatment and RO/NF system pretreatment.

High-Performance Internal Pressure PES ultrafiltration membrane

FiltMem PES ultrafiltration (UF) membrane utilizes Reverse Thermally Induced Phase Separation (RTIPS) technology, ensuring high flux and anti-compaction properties with a gradient sponge pore structure.

The PES UF series specifically engineered for municipal and industrial wastewater treatment, RO pretreatment, and biopharma process applications. With excellent permeability, anti-fouling properties, and broad chemical tolerance, this module ensures reliable performance and long operational life in demanding environments.

Membrane Parameters

Parameter	HNE-0.75-WT	HNE-0.9-WT	HNE-1.1-WT	HNE-1.3-WT
Inner/Outer Diameter	0.75/1.15mm	0.9/1.4mm	1.1/1.6mm	1.3/1.95mm
Filtering Method	Internal pressure filtration
Average Pore Size	20-25nm
Pure Water Flux	≥800 LMH (0.1 MPa, 25°C)
Bubble Point	>0.6 MPa (Ethanol)
Burst Pressure	>1.2 MPa
PH Tolerance Range	1-14
Maximum Chlorine Tolerance	250 ppm

Features

Gradient sponge structure, dense inner layer combined with a loose intermediate support layer enables high flux and resistance to compaction.
Strong acid/alkali resistance (pH tolerance: 1-14) and high chlorine tolerance (up to 250 ppm residual chlorine).
Hydrophilic modification via blending technology reduces fouling adhesion.
Narrow pore size distribution with a most probable pore size of 20 nm, delivering excellent virus retention, particularly suited for drinking water safety applications.
Pure water flux ≥800 LMH (0.1 MPa, 25°C), 30% higher than traditional internal pressure membranes.
The membrane fiber tensile strength ≥6 N, capable of meeting the demands of high-pressure operation and high-intensity backwashing requirements.
Available in multiple inner diameter specifications (0.75/1.15 mm, 0.9/1.4 mm) to accommodate varying turbidity and viscosity requirements in raw water treatment.

Applications

Municipal wastewater treatment and reuse
Industrial effluent treatment (enhancing the purity of process water and treating various industrial effluents)
Biopharma fermentation broth clarification
RO/NF system pretreatment
Cooling tower water recycling
Food & Beverage Industry (product clarity, concentration, and microbial safety)

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Electron Micrograph of PES UF Membrane

The membrane features a distinctive three-phase gradient sponge structure, with the densest layer at the inner and a more open outer protective layer.

Unique Gradient Sponge-like Three-Phase Structure
The central section exhibits the highest porosity, while the inner layer presents the densest configuration
Inner layer(separation layer): Pore diameters predominantly range between 20-30 nm
The outer layer (protective layer): Features open pores of approximately 200 nm in diameter

Module Specifications

Module Type	RHP2-0450A-5	RHP2-0450B-5	RHP2-0860A-55	RHP2-0860A-64	RHP2-0860B-40	RHP2-1060A-55	RHP2-1080A-75	RHP2-1060B-60	RHP2-1170A-81
Diameter	4''		10''			8''			11''
Effective Membrane Area	5 m²		55 m²	65 m²	40 m²	55 m²	75 m²	60 m²	81 m²
Module Dimension	Φ90×1112	Φ90×1290	Φ219×1901	Φ219×1901	Φ200×1528	Φ250×1715	Φ250×2215	Φ250×1681	Φ273×2115
Hollow Fiber	PES
Average Pore Size	20nm		25nm
Inner/Outer Diameter of the Fiber	1.1/1.6 or 1.3/1.95		0.9/1.4	0.75/1.15	0.9/1.4	0.9/1.4	0.75/1.15	0.9/1.4	0.9/1.4
Module Housing	UPVC	CPVC	UPVC
Operating Temperature Range	1-45°C	1-85°C	1-45°C
PH Tolerance Range	1-14
Maximum Chlorine Tolerance	250 ppm
Design Flux	40-150 LMH	40-200 LMH	50-200 LMH