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.

 

 
  • Ultrafiltration Water System
    Ultrafiltration water system is an advanced water purification process, where reclaimed water is forced through a semipermeable membrane. During the filtration process, suspended solids and...
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  • Nanofiltration Water System
    Similar 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...
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  • Nanofiltration Equipment
    Featuring selective filtration, low energy consumption and minimal maintenance requirements, our nanofiltration systems have become a reliable upgrade choice for industrial water treatment across...
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  • Ultrafiltration Equipment
    Our ultrafiltration equipment is a practical, intelligent separation.
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  • Ultrafiltration System
    Ultrafiltration systems stand as one of the most essential equipment in modern water treatment infrastructure.
    view more
  • Nanofiltration System
    Nanofiltration (NF) systems are advanced membrane separation solutions that bridge the gap between ultrafiltration (UF) and reverse osmosis (RO) in water treatment.
    view more
  • Industrial Ultrafiltration System
    With 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...
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  • Tubular Ultrafiltration System
    The 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...
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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.

ultrafiltration system

 

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
 
Ultrafiltration 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.

Nanofiltration System

 

Process Flow Diagram of UF System
 

productcate-1165-650

 

Process Flow Diagram of NF System
 

productcate-1165-650

 

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

 

Q: What is the difference between UF and NF systems?

A: UF mainly removes suspended solids and bacteria, while NF can additionally remove hardness, organics, and partial dissolved salts.

Q: What industries commonly use UF systems?

A: UF systems are widely used in municipal water treatment, food & beverage, pharmaceutical, and wastewater reuse applications.

Q: Is NF better than RO for some applications?

A: Yes. NF operates at lower pressure and is suitable when partial desalination or selective ion removal is required.

Q: Can UF systems be used before RO systems?

A: Yes. UF is commonly used as pretreatment to protect RO membranes and improve system stability.

Q: What contaminants can NF membranes remove?

A: NF membranes can reduce hardness, color, organic matter, bacteria, and some dissolved salts.

Q: Are UF and NF systems fully automatic?

A: Most industrial UF and NF systems are equipped with PLC automatic control and online monitoring.

Q: What materials are available for piping and frames?

A: UPVC, SS304, and SS316 are commonly available depending on water quality and industry standards.

Q: What is the typical service life of UF and NF membranes?

A: Membrane lifespan usually ranges from 2 to 5 years with proper pretreatment and maintenance.

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.

nanofiltration filter, uf system water treatment, UF Membrane
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