WFI (Water for Injection) System

The WFI equipment equipped with Asahi Kasei's high-performance UF membrane directly blocks impurities such as endotoxins, enabling stable production of high-purity water. The absence of the steam cooling process required in conventional distillation methods simplifies the equipment structure and reduces the risk of foreign matter contamination. This combination of physical size exclusion and simple equipment design enables efficient production of higher-purity water.

In conventional distillation methods, large amounts of steam are generated and then cooled to produce water for injection. In contrast, WFI equipment using Microza® hollow fiber membranes eliminates the need for energy-intensive distillation. This significantly reduces CO₂ emissions and energy costs compared to conventional methods.

Generally, membrane-based water for injection production ensures high water purity, but some may be concerned about whether hygiene is equivalent to distilled water. Asahi Kasei addresses this by designing equipment that can be steam sterilized (SIP) in its entirety, unlike other membrane systems, ensuring hygiene equivalent to distilled water. This enables both high water quality and hygiene, providing greater assurance.

Asahi Kasei provides a service system combining remote monitoring and regular maintenance after WFI equipment installation, supporting continuous optimal operation.

Regular checks of data such as pressure, flow rate, temperature, tank water level, and bio-particles enable early detection of abnormalities. Prompt response helps prevent problems before they occur.

Air leak inspections, replacement of consumables, and steam sterilization as needed are performed to maintain high levels of hygiene and performance.

By regularly replacing the membranes and preventing performance degradation due to aging, stable production of high-purity water can be achieved.

This comprehensive service structure not only ensures long-term, reliable use of WFI equipment, but also contributes to cost reduction throughout the entire lifecycle. Asahi Kasei provides consistent support from pre-installation to post-installation, strongly supporting improvements in customers' production systems and stable operation.