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About Us
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Products & Services
Purified Water Preparation System Water for Injection Preparation System 

Ambient Membrane WFI Preparation System Pure Steam Generator
Bioreactor Upstream/Downstream Piping & Tanks
High-Pressure Homogenizer System Ultrafiltration System 

Sanitary-grade container Electrolytic Ozone Generator 

Hygienic Bottom-Mount Magnetic Stirrer Sanitary Centrifugal Pump For process gas systems—including process compressed air, nitrogen (N2), oxygen (O2), carbon dioxide (CO2), and specialty gases—Welkin provides secondary design, fabrication, installation, commissioning, and validation services. These services are capable of meeting the requirements of domestic and international projects regulated by the FDA, WHO, EMEA, NMPA, and other authorities.





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Welkin can provide tailored powder or liquid dosing and blending systems that meet the requirements of the pharmaceutical, food, and beverage industries, customized to clients’ specific processes.
• Added to the pipeline mixing pump via a powder metering and feeding system for online mixing.
• Pre-mixing prior to addition to the circulating pump pipeline via a mechanical diaphragm metering pump
• OtherWelkin provides customers with customized solutions, encompassing project design, procurement, manufacturing, construction and commissioning, as well as validation services.
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Welkin adheres to the service philosophy of “comprehensive, high-quality, and rapid,” providing convenient and efficient technical and service support for customers’ system operations and promptly resolving any issues that arise during the after-sales process.
• Professional maintenance and repair services are provided during the warranty period;
• Provide professional and ongoing training services;
• We have a professional technical team that responds promptly and provides on-site service.
• Free provision of our in-house developed remote cloud service, enabling remote monitoring via the mobile app;
• A well-stocked inventory of spare parts is maintained to ensure convenient and timely component replacement over the long term, thereby guaranteeing the reliable operation of customers’ equipment.
Domestic after-sales service network coverage:
• Headquarters and Production Base: Wuxi
• Shanghai Branch: Shanghai
• Southeast Region: Guangzhou
• Southwest Region: Chengdu
• North China Region: Beijing -
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Welkin Industrial’s innovative hollow-fiber nanofiltration membrane, “NanoPure™,” is a world-leading nanofiltration membrane featuring a hollow-fiber structure and a surface with selectively charged functional groups. It can selectively remove harmful impurities such as heavy metals, divalent ions like calcium and magnesium, and organic chemicals from water while retaining certain low-valence ions.
NanoPure™ Product Line
NanoPure™ is composed of modified polyethersulfone (PES) hollow-fiber membranes, offering exceptional stability and durability with high flux:
NanoPure™ Application Areas
· Cross-flow, inward-outward filtration, and backwashable operation modes;
· Vertical installation operating conditions;
· High pH resistance and chlorine resistance;
· Effectively removes pigments, divalent ions, and dissolved organic matter.

Product Specifications
NanoPure™ Membrane Module | NF8060A | NF8060B | |
Membrane Module Specifications | Membrane area | ~45 square meters | ~20m |
Membrane module dimensions (D1, D2, and D3) | 60/45 mm | 60/45 mm | |
Membrane filament parameters | Membrane material | Modified polyethersulfone | |
Molecular Weight Cut-Off (MWCO) | 300, 500, 900 daltons | ||
Magnesium sulfate rejection rate a | >90% | ||
Membrane surface charge | Negative charge | ||
Membrane filament inner diameter | 0.7 mm | ||
Membrane housing and encapsulation | Housing | PVC | |
Encapsulation material | Epoxy resin | ||
Influent Water Quality | Maximum Total Suspended Solids | ~350 ppm | |
Maximum Turbidity | ~160 NTU | ||
Maximum particle size | ~160 μm | ||
Operating Conditions | Maximum transmembrane pressure | 5.5 bar | |
Operating pH range | 0-14 | ||
Chemical Cleaning pH Range | 0-14 | ||
Maximum chlorine resistance | 250,000 ppm-hours at pH 9 | ||
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Headquarters Address: No. 156, Xixie Road, Xinwu District, Wuxi City, Jiangsu Province
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