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Ensuring filter integrity with PUPSIT in pharmaceutical production

Atlas Copco's process filtration systems guides you on how PUPSIT strengthens sterile filtration and supports Annex 1 compliance in pharmaceutical production.

Pre-use post-sterilization integrity testing, often referred to as PUPSIT, plays an increasingly important role in sterile process filtration, particularly in highly regulated manufacturing environments. As production processes become more complex and quality expectations continue to rise, ensuring that sterile filters perform exactly as intended before use has become a critical consideration for manufacturers.

Sterilization and installation can place significant stress on filter elements, and any damage introduced at this stage may not be visible or detectable during routine operation. Without verification prior to production, compromised filters can pose a risk to product quality, patient safety, and regulatory compliance. This has led to a growing focus on integrity testing methods that confirm filter performance at the most critical point, before product contact begins.

At the same time, regulatory guidance and industry expectations are evolving. Manufacturers are increasingly expected to demonstrate a clear understanding of filtration risks and to apply appropriate controls within their processes. Implementing PUPSIT is not only a technical decision but also a strategic one, involving considerations around system design, operational practicality, and overall risk management.

Understanding where PUPSIT fits within a broader sterile filtration strategy is becoming essential for teams responsible for process design, quality assurance, and compliance. As best practices continue to develop, manufacturers are re-evaluating how integrity testing can strengthen confidence in their processes and support long-term operational reliability.

Atlas Copco is a global leader in smart, energy-efficient solutions across industries ranging from food and beverage to pharmaceuticals, chemicals, and microelectronics, with an extensive process filtration range, covering cartridges, capsules, bags, and housings, that complement industry-leading systems which can be tailored to the specific needs of food and beverage, microelectronics, pharmaceutical, cosmetics, and chemical markets.

Learn more about these solutions and PUPSIT on Atlas Copco’s relevant blog.

Process filtration product portfolio

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