Your Leading UF System/NF System Supplier
Qingzhou Foren Water Treatment Equipment Co., Ltd. is a professional manufacturer specializing in the research and development (R&D), production, and sales of water treatment and filling equipment. Our main products include a wide variety of water treatment equipment, such as reverse osmosis systems, UF system/NF systems, EDI equipment, water softener systems, wastewater recycling systems, containerized water treatment systems, seawater desalination plants, and water treatment equipment accessories, providing integrated solutions for the water treatment, industrial water treatment, beverage, and pharmaceutical industries.
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Ultrafiltration Water SystemUltrafiltration water system is an advanced water purification process, where reclaimed water is forced through a semipermeable membrane. During the filtration process, suspended solids and...view more
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Nanofiltration Water SystemSimilar to RO and UF systems, the NF system differs from UF in that it can recover part of the feed water. Nanofiltration system is a highly efficient membrane separation technology device with a...view more
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Nanofiltration EquipmentFeaturing selective filtration, low energy consumption and minimal maintenance requirements, our nanofiltration systems have become a reliable upgrade choice for industrial water treatment across...view more
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Ultrafiltration EquipmentOur ultrafiltration equipment is a practical, intelligent separation.view more
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Ultrafiltration SystemUltrafiltration systems stand as one of the most essential equipment in modern water treatment infrastructure.view more
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Nanofiltration SystemNanofiltration (NF) systems are advanced membrane separation solutions that bridge the gap between ultrafiltration (UF) and reverse osmosis (RO) in water treatment.view more
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Industrial Ultrafiltration SystemWith the development of the times, clean water has become crucial. UF technology stands out for its efficient removal of pollutants (from bacteria to macromolecules), and industrial UF systems...view more
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Tubular Ultrafiltration SystemThe membrane filters in tubular ultrafiltration systems have a gap of 0.03 microns, allowing only water and soluble substances to pass through while blocking any insoluble substances, effectively...view more
Why Choose Us?
Integrated Solution Capability
We provide end-to-end solutions covering system design, equipment supply, installation, and after-sales service, helping customers streamline project execution.
Proven Industry Experience
We have established long-term cooperation with domestic and international clients, supported by extensive project experience in water treatment and filling systems.
Reliable Product Performance
Our systems are designed for stable operation, energy efficiency, and easy maintenance, ensuring long-term and cost-effective use in various industries.
Quality Assurance and Compliance
We operate under ISO 9001 standards, with strict testing and inspection processes to ensure consistent quality and reliable performance.
Types of UF System/NF System
UF (Ultrafiltration)
Removes suspended solids, bacteria, protozoa and high-MW organics; lets dissolved salts pass. Typical pressure ~1–7 bar. Often used as a pretreatment barrier.
NF (Nanofiltration)
Partial desalting with preference for divalent ions (hardness) and color/large organics; nominal MWCO ~200–800 Da; typical pressure ~3.5–30 bar.

Specifications of UF System/NF System
|
Item |
UF System |
NF System |
|
Product Name |
Ultrafiltration System |
Nanofiltration System |
|
Filtration Precision |
0.01–0.1 μm |
0.001 μm |
|
Main Function |
Remove suspended solids, bacteria, colloids |
Remove hardness, organics, partial salts |
|
Membrane Type |
Hollow fiber membrane |
Spiral wound membrane |
|
Operating Pressure |
Low pressure |
Medium pressure |
|
Feed Water Source |
Surface water, municipal water, groundwater |
RO pretreatment or softened water |
|
Recovery Rate |
90–95% |
75–90% |
|
Turbidity Removal |
High efficiency |
High efficiency |
|
Bacteria Removal |
≥ 99% |
≥ 99% |
|
Organic Matter Reduction |
Moderate |
High |
|
Hardness Reduction |
Limited |
Effective |
|
System Capacity |
Customizable |
Customizable |
|
Control System |
PLC automatic control |
PLC automatic control |
|
Cleaning Method |
CIP cleaning |
CIP cleaning |
|
Membrane Material |
PVDF / PES |
Polyamide membrane |
|
Piping Material |
UPVC / SS304 / SS316 |
UPVC / SS304 / SS316 |
|
Installation Type |
Skid-mounted |
Skid-mounted |
|
Energy Consumption |
Low |
Moderate |
|
Typical Applications |
Pretreatment, wastewater reuse, drinking water |
Softening, color removal, industrial process water |
|
Industries Served |
Food & beverage, municipal, pharmaceutical, textile, electronics |
Food & beverage, pharmaceutical, textile, chemical industry |
Advantages of UF System/NF System

UF System
Chemical-Free Water Softening: Unlike traditional ion-exchange softeners that replace hardness ions with sodium and require salt regeneration, NF physically removes calcium and magnesium ions, providing softened water without adding sodium or requiring salt.
Targeted Contaminant Removal: It effectively removes undesirable components, such as hardness, sulfates, color, and natural organic matter (which can form harmful disinfection byproducts when chlorinated), while preserving some potentially beneficial minerals.
Energy Savings Compared to RO: By operating at lower pressures, NF significantly reduces the energy costs associated with achieving partial demineralization or softening compared to RO.
Enhanced RO Performance: Used as a pre-treatment before RO, NF removes scale-forming ions (calcium, magnesium, and sulfates), reducing the risk of scaling and fouling on the RO membranes, which potentially allows the RO system to operate more efficiently and recover more water.
Improved Water Aesthetics: NF effectively removes color and large organic molecules, resulting in clearer water with potentially enhanced taste and odor compared to UF treatment alone.
NF System
Selective Filtration: Unlike reverse osmosis, which removes nearly all dissolved substances, nanofiltration selectively filters water to retain helpful minerals like sodium and potassium.
Improved Water Taste: Thanks to its selective process, NF systems ensure water tastes fresh and natural—not flat or overly softened.
Energy Efficiency: This low-pressure membrane filtration technology consumes less energy compared to reverse osmosis, making it a more eco-friendly choice.
Versatile Applications: From drinking water purification to industrial uses, NF systems cater to diverse needs. They function as a PFAS removal filter, provide salt-free water softening, work in whole house nanofiltration system configurations, and serve as the best filter for hard water and PFAS combined.
Compact Design: Many residential systems are compact and easy to install, fitting conveniently under kitchen sinks or as whole-house solutions.

Process Flow Diagram of UF System

Process Flow Diagram of NF System

Usage of UF System/NF System
UF membranes are mainly used in mineral water, mountain spring water, drinking water processing; the pretreatment or post treatment of reverse osmosis membrane, the reuse of condensed water and reclaimed water, the treatment of municipal water, urban and rural drinking water, sand filter backwashing water and wastewater filtration, etc.
NF membranes are mainly used in the pretreatment of RO process, the purification of drinking water and industrial water, wastewater purification treatment, the concentration of valuable components in the process, etc.
Customization Options
|
System Capacity |
Customizable |
|
Membrane Material |
Selectable |
|
Pipe Material |
Selectable |
UF System vs NF System Comparison
|
Process |
Separation scale |
Salt rejection |
Operating pressure |
Removes reliably |
Typical permeate |
Common polymers |
Typical position |
|
UF |
Pores ~0.01–0.1 μm; MWCO ~100–500 kDa |
~0% (salts pass) |
~1–7 bar |
Turbidity/SDI, colloids, bacteria, protozoa, high-MW organics |
Low turbidity; microbes removed; TDS unchanged |
PVDF, PES, PTFE |
Pretreatment barrier before NF/RO or as standalone clarity step |
|
NF |
Nominal MWCO ~200–800 Da |
~20–98% (divalent > monovalent) |
~3.5–30 bar |
Hardness (Ca/Mg), color, large organics, partial TDS |
Softened/partially desalted water |
Thin-film polyamide |
After UF; sometimes alternative to softening before RO |
Payment Terms
T.T with 30% downpayment, 70%before shipment. Paypal or West Union also accept.
Packing & Transportation
|
Category |
Details |
|
Packaging Method |
Container loading;protective film wrapping; wooden crates; reinforced with steel bars. |
|
Transportation Method |
Sea freight (preferred for large items); |
|
Air freight (for emergency spare parts). |
FAQ
As one of the most professional uf system/nf system manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please feel free to buy customized uf system/nf system made in China here from our factory. Contact us for quotation.
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