Contained Filter Hopper Discharge: AVAX + Easylock + ACUBE
EXECUTIVE SUMMARY
- Operator protection at filter discharge: A major pharmaceutical manufacturer in the Basel region, Switzerland, eliminated uncontrolled dust exposure during filter hopper discharge by installing an AVAX Stainless Steel valve with Easylock directly on the filter hopper outlet, validated to OEL < 1 µg/m³ (ISPE/SMEPAC).
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- Custom-engineered waste containment: Andocksysteme designed the ACUBE Single Liner with custom dimensions to fit exactly inside a standard cardboard box, enabling operators to disconnect the liner from the AVAX SS Easylock, close the box lid, tape and lock it, and send the entire sealed package to incineration without secondary handling or repacking.Â
- Solution partnership, not product sale: The project demonstrates Andocksysteme’s approach to high-OEL containment as collaborative engineering, working closely with the customer to identify the exact pain points in toxic powder transfer and waste handling, then designing a tailored system rather than applying a standard product.
| Industry | Pharmaceutical manufacturing |
| Process step | Filter hopper discharge, toxic powder collection and disposal |
| Product handled | Pharmaceutical API fines, sub-10 µm respirable fraction, OEL-classified toxic material |
| Exposure category | OEL < 1 µg/m³ (TWA) |
| Location | Basel region, Switzerland |
Project Requirements
A major pharmaceutical manufacturer in the Basel region, Switzerland, operates process filters on solid-dose manufacturing lines producing finished medicines. The filter hoppers accumulate API-laden fines generated during granulation, tableting, and coating operations. Periodic discharge of these hoppers represents one of the highest-risk containment operations in the facility: the collected material is the finest, most respirable particle fraction from the entire processing run, present at concentrations far above those found in the bulk blend.
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Primary engineering and operational challenges:
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- Multi-step waste handling with no mechanical containment guarantee: The existing method relied on flexible plastic bags attached to the hopper outlet. Once filled, the bags had to be transferred to separate disposal containers or drums, creating a secondary exposure point. Each step, removing the filled bag, sealing it, and placing it into the larger disposal container, introduced potential for dust release and cross-contamination.
- Inventory and repacking burden: Standard waste containers came in fixed sizes that did not align with the actual hopper discharge volume. Operators either filled containers only partially (wasting space and creating inventory complexity) or were forced to repack filled bags into larger containers to meet incineration delivery requirements. Each repack step was an additional containment risk and operational inefficiency.
- Lack of validation pathway for OEL compliance: Without a validated valve at the hopper outlet, the discharge sequence offered no mechanical guarantee that the powder boundary was maintained during collection and removal. This method could not be presented as compliant with OEL requirements during regulatory inspection, and offered no documented evidence of containment performance.
Solution
Selected Solution: AVAX Stainless Steel with Easylock paired with custom-designed ACUBE Single Liner dimensioned to fit exactly inside a standard cardboard box
Andocksysteme treated this as a custom solution project, not a standard product installation. The objective was to eliminate the multi-step waste disposal pathway and create a single, sealed, disposal-ready container that integrated directly with the hopper discharge interface. The solution centred on designing the ACUBE Single Liner (a flexible single-use container) with custom external dimensions that match exactly the internal dimensions of a standard corrugated cardboard box used for incineration shipping.
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- Hybrid architecture for total containment: The AVAX Stainless Steel (AVS 100-EL-000) with integrated Easylock is mounted permanently on the filter hopper outlet. The ACUBE Single Liner is a transparent PE film bag with integrated AVAX passive interface, fitted inside the cardboard box before the operator docks it to the hopper. When discharge is complete, the operator closes the valve using the Easylock, undocks the ACUBE, closes the cardboard box lid, tapes and locks it, and the entire sealed package is ready for incineration. No secondary repacking, no intermediate transfer steps, no powder exposure during waste handling.
- Custom dimensions eliminate repacking: The ACUBE Single Liner was engineered with dimensions that fit precisely inside the internal cavity of a standard cardboard box. The filled liner does not shift inside the box, requires no padding, and occupies the full available space. The operator simply closes the box lid after undocking. There is no need to fit the bag into a separate container or adjust its position. The waste container and the disposal container become one object.
- Easylock for repeatable, tool-free operation: The integrated Easylock mechanism enables single-handed docking and undocking, with an adjustable end stop for consistent closure. The operator connects the ACUBE (already positioned in the cardboard box) to the AVAX on the hopper, activates the Easylock to open both valve discs, allows filter fines to discharge directly into the liner inside the box, closes the valve, and undocks. The entire sequence is mechanical and does not depend on operator technique or secondary sealing tools.
- SMEPAC-validated OEL < 1 µg/m³ containment: The AVAX Stainless Steel and AVAX plastic pairing is validated by ISPE/SMEPAC testing to OEL < 1 µg/m³ TWA. Materials are 316L stainless steel (product-contact), FPM or PTFE seals, and PEEK bearings, meeting FDA CFR Title 21 and GMP surface hygiene (Ra ≤ 0.8 µm on product-contact components).
Benefits
The custom ACUBE Single Liner in cardboard box integration was deployed as the standard waste collection and disposal method for all filter discharge operations on the production line.
- Contained waste pathway from hopper to incineration: Filter fines are collected, sealed, and prepared for incineration in a single integrated process. The mechanical valve closure at the hopper outlet maintains the containment boundary throughout docking, discharge, and undocking. The filled ACUBE inside the sealed cardboard box is then transported directly to incineration without any intermediate handling or repacking, eliminating the secondary exposure point that existed in the previous workflow.
- Elimination of inventory complexity and repacking steps: By designing the ACUBE Single Liner to fit exactly inside the cardboard box, the operator workflow is simplified: connect, discharge, close, seal, send. There is no decision about which sized container to use, no need to adjust the position of the bag inside the box, and no requirement to repack or transfer the waste material. This reduces the operational steps from four or five discrete actions down to a single continuous procedure.
- Regulatory audit readiness for waste containment: The SMEPAC-validated OEL performance and documented materials compliance provide the evidence package required during EU GMP and EHS inspections. The waste disposal pathway, previously uncontrolled, is now supported by published containment performance data and a documented procedure. Regulators accept SMEPAC methodology as the primary evidence of containment performance for potent API waste handling.
- Operational efficiency and training burden reduction: The Easylock mechanism removes tool dependency and operator technique variability from the changeover sequence. A single operator performs the full waste collection and packaging using the Easylock handle, without secondary sealing tools or manual bag adjustments. Training time is reduced because the procedure is mechanical and repeatable, not dependent on dexterity or experience.
- Demonstration of Andocksysteme’s solution partnership approach: This project illustrates how Andocksysteme works with customers who face non-standard containment challenges. Rather than applying an off-the-shelf product, Andocksysteme engaged as an engineering partner, understood the exact constraints (cardboard box size, incineration shipping requirements, operator workflow), and designed a custom ACUBE configuration to solve the specific problem.
Conclusion
This installation demonstrates that customised containment solutions are possible when a manufacturer’s waste handling process has unique geometric or operational constraints. The highest-risk point in potent API waste management is not the volume of material, but the number of handling steps and the particle size of the fines. Addressing it requires engineering that considers the total waste pathway, from hopper discharge through to disposal container sealing.
Andocksysteme’s approach in this project was to listen to the customer’s specific pain: repacking waste, managing multiple container sizes, maintaining containment through multi-step waste handling. We then engineered a solution that eliminated those steps entirely. The custom ACUBE Single Liner dimensioned to fit exactly inside the cardboard box is not a standard product. It is a bespoke design that emerged from close collaboration between Andocksysteme’s engineering team and the customer’s operations and EHS functions.
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For pharmaceutical manufacturers handling potent API fines at OEL < 1 µg/m³, waste disposal is often treated as an afterthought in containment planning. This case study shows that the waste pathway can be as controlled and validated as any primary process interface. Custom engineering, when applied to the specific geometry and workflow constraints of a customer’s facility, often yields simpler, more efficient, and more compliant solutions than applying standard products.