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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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Membrane-Base WFI System
WELKIN has mastered globally leading core technologies, including hollow fiber nanofiltration, reverse osmosis (RO), electrodeionization (EDI) membranes, and terminal ultrafiltration, to produce Water for Injection (WFI) at normal temperature. The water quality not only meets but exceeds the requirements of Pharmacopoeia standards and client specifications (MWFIS).
Our latest-generation filtration technology features hollow fiber nanofiltration as the pretreatment core unit. This world-leading nanofiltration membrane utilizes a hollow fiber structure and surface selective charge, ensuring high-quality, stable water for subsequent purification. More importantly, it removes endotoxins at the source, guaranteeing the final WFI quality.
Our terminal ultrafiltration membrane employs a patented double-layer structure with precise small-molecular pore sizing, effectively removing endotoxins and particles from the final water. It supports thermal disinfection, chemical disinfection, and even in-place steam sterilization. Additionally, based on the direct integrity test principle, the terminal ultrafiltration system incorporates a bubble observation test (conducted through the water production side).
MWFIS Advantages
· Prevent from external and internal contamination with CCS control Strategy.
· Ensure the integrity performance of filtration membrane, the system sustainability, stability and reliability with PAT online analysis technology.
· The endotoxin removal rate is greater than log5, though end ultra-filter redundant design and integrity test on line.
MWFIS application
· Animal Vaccine production
· Cleaning water for dosages and biopharmaceuticals process
· Class III medical devices manufacture
· Dialysate and controlling endotoxin dosages
· Heat sensitive Nucleic acid and Protein reagents preparation
· API dissolution
Hollow fiber nanofiltration as pretreatment unit, replace traditional pretreatment unit which easily happen with external contamination. In a short, compared with distillation method, MWFIS has been fully qualified in particle pollution control, operation continuity, endotoxin removal rate, investment and operation cost, and carbon footprint reduction.
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Headquarters Address: No. 156, Xixie Road, Xinwu District, Wuxi City, Jiangsu Province
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