DNF1/DNF2 4040 and 8040 Spiral-Wound Nanofiltrati | RFQ Sourcing Details
Filtration And Membranes · Quote on request
This is a product procurement detail page: check specs, images, category context and related sourcing paths before sending an RFQ.
Quote on requestProduct specs
Buyer's Digest
Use this page as a product-first sourcing checkpoint before sending an RFQ. Category: Filtration And Membranes. Confirm application fit, capacity, materials, destination, lead time and compliance requirements before comparing suppliers.
Original product description
The DNF1/DNF2 series consists of spiral-wound aromatic polyamide nanofiltration membrane elements for material separation and concentration. Available models are DNF1-4040, DNF1-8040, DNF2-4040, and DNF2-8040. The 8040 elements have a stated active membrane area of 37 m², while the 4040 elements have 7.6 m².
All listed models use a 34 mil feed spacer. DNF1 is configured for high total organic carbon removal with medium inorganic-salt rejection. Under the stated standard test conditions, its magnesium sulfate rejection is at least 98% and its sodium chloride rejection is 30% ±10%.
Published permeate flow is 40 m³/day for DNF1-8040 and 8 m³/day for DNF1-4040. DNF2 is intended for higher rejection of multivalent ions while maintaining lower rejection of monovalent ions. Under the stated test conditions, magnesium sulfate rejection is at least 98% and sodium chloride rejection is 60% ±10%.
Published permeate flow is 38 m³/day for DNF2-8040 and 7.6 m³/day for DNF2-4040. DNF1 performance testing uses 2,000 mg/L MgSO4 and 500 mg/L Na. Cl at 0.5 MPa, 25°C, 15% recovery, and pH 6.5-7. DNF2 uses the same solutions, temperature, recovery, and pH range at 0.75 MPa.
The reported performance parameters are measured after 30 minutes of stable system operation, and stated water-yield deviation is ±15%.
Listed operating limits include a maximum pressure of 4.1 MPa, feed temperature of 5-45°C, feed pH of 3-10, cleaning pH of 2-11, maximum feed turbidity of 1.0 NTU, maximum feed SDI15 of 5, residual chlorine below 0.1, and a maximum single-element pressure drop of 15 psi.
Maximum feed flow is listed as 17 m³/h for 8040 models and 3.6 m³/h for 4040 models. Supported application fields include salt-mine recycling, halogen refining, food concentration, pharmaceutical purification, water purification, reclaimed-water reuse, cooling-water treatment, and boiler-water treatment.
Suitability remains dependent on feed composition and process objectives.
Before procurement, the buyer should confirm whether DNF1 or DNF2 provides the required ion selectivity, verify the selected 4040 or 8040 format against the intended pressure vessel and system layout, and request performance projections based on the actual feed-water analysis.
Also confirm the interpretation and unit basis of the residual-chlorine limit, required pretreatment, cleaning protocol, element quantity, customization scope, packaging, inspection criteria, warranty, and delivery terms.
DNF1 | Applications and Buyer Notes
DNF1 is organized as a sourcing-ready Filtration And Membranes reference. The page combines visible product or company data with structured procurement cues so buyers can compare application fit, specifications, quantity, quality requirements and lead-time que
Applications
- Initial shortlist building for related product or supplier options.
- Specification and application fit review before bulk purchasing.
- Category, keyword and detail-page comparison before sending an RFQ.
Key specifications
- Category
- Filtration and MembranesBased on visible page data; confirm exact value in the RFQ.
- Unit
- setBased on visible page data; confirm exact value in the RFQ.
- Models
- DNF1-4040, DNF1-8040, DNF2-4040, DNF2-8040Based on visible page data; confirm exact value in the RFQ.
- Material
- Aromatic polyamideBased on visible page data; confirm exact value in the RFQ.
- Structure
- Spiral-woundBased on visible page data; confirm exact value in the RFQ.
- Membrane type
- Nanofiltration (NF)Based on visible page data; confirm exact value in the RFQ.
- Standard test pH
- 6.5-7Based on visible page data; confirm exact value in the RFQ.
- Maximum feed flow
- 17 m³/h for 8040;3.6 m³/h for 4040Based on visible page data; confirm exact value in the RFQ.
Buyer tips
- State quantity range and split-delivery needs before price comparison.
- Add certification, material or inspection standards when they affect acceptance.
- For time-sensitive projects, include target arrival date and destination.
- For special applications, describe operating condition, installation environment and duty cycle.
FAQ
What should buyers confirm first?
Confirm application, specification, quantity, destination and lead-time requirements before comparing offers.
Can buyers inquire when specs are incomplete?
Yes. Add model, material, size, use case and inspection needs in the RFQ to make replies comparable.
How should this listing be evaluated?
Check title, category, specifications and related keywords against the actual sourcing requirement.
Source mix: ugc
Key specifications
Product sourcing keywords
These terms come from the title, visible copy and specifications, and link into matching aggregate pages.
Continue from this detail page into sourcing structure
These links connect the detail page back to category hubs, procurement aggregates and knowledge pages so new inventory is not isolated.
This URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path Wastewater Treatment Equipment categoryThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path Dosing And Disinfection categoryThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path Filtration And Membranes categoryThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path Pumps Tanks And Environmental Packages categoryThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path Procurement sourcing pathThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path Reverse Osmosis System Manufacturers sourcing pathThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path 12v 280ah 320ah Lifepo4 Battery Box With Active Balancer And Metal Shell For Stackable StorageThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path Wastewater Treatment Exporters sourcing pathThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path Water Treatment Equipment Suppliers sourcing pathThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path CompanyThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path 2026 Eu New Stock Eve Lf334 Lf 334ah Lifepo4 3 2v Lfp Eve 334ah 345ah 350ah 360ah Un38 3 Lithium BatThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path 250ml Juice Milk Beverage Water Carton Filling Machine For Aseptic PackagingThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Internal sourcing path 8038 Spiral Wound Sanitary Nf Membrane Element For Food And Dairy ProcessingThis URL was refreshed but still has no Googlebot evidence, so it is promoted into shared internal links for crawl discovery.
Demole DNF1/DNF2 4040 and 8040 Spiral-Wound Nanofiltration Membrane ElementsRequest Quote
Breezetech NF-8040 Industrial Spiral-Wound Nanofiltration MembraneRequest Quote
Proshare NF98-SPEC-8040F34 8-Inch Custom Nanofiltration Membrane ElementRequest Quote
8038 Spiral-Wound Sanitary NF Membrane Element for Food and Dairy ProcessingRequest Quote
BW 400 8-Inch Spiral-Wound Brackish Water RO Membrane Element, 11,000 GPDRequest Quote
WL-TW-8040-HF Industrial Tap-Water Reverse Osmosis Membrane Element, 11,000 GPDRequest QuoteWaterTreatmentSource related sourcing paths
Filtration and Membrane Systems
Filtration and Membrane Systems for Industrial Water Treatment
Filtration and Membrane Systems for Drinking Water Purification
Wastewater Treatment Equipment for Industrial Water Treatment
WaterTreatmentSource procurement phrases
WaterTreatmentSource related product samples
. Overview FAQ Overview . Model NO. SH Type Piston Filling Machine Automatic Grade Fully Automatic Material Type Paste F...
Filtration and Membrane Systems Anaerobic Aerobic Wastewater Treatment Mbr System Domestic Sewage Waste Water Treatment EquipmentPhosphorus is released in the anaerobic tank, and nitrification and phosphorus absorption are carried out in the aerobic...
Filtration and Membrane Systems Compact Sewage Treatment Plant for Industrial Wastewater Mbr Wastewater Treatment - Wastewater TreatPhosphorus is released in the anaerobic tank, and nitrification and phosphorus absorption are carried out in the aerobic...
Filtration and Membrane Systems DN80 Pn10 Standard Lap Joint Municipal Sewage Discharge Stainless Steel FlangeFLANGE Discover the indispensable nature of the flange, a vital, disc-shaped connector in mechanical engineering that se...
Filtration and Membrane Systems 250ml Juice Milk Beverage Water Carton Filling Machine for Aseptic Packaging. Overview Detailed Photos Application Scope Product Parameters Workshop Spare Parts Packaging & Shipping FAQ Overview ....
Filtration and Membrane Systems Industrial Water Treatment Systems Sludge Dewatering and Drying Machine Air Source Heat Pump SludgeJiangsu BOE Environmental Protection Technology Co., Ltd. and Xi'an Jiaotong University have jointly developed a complet...