MSR™ – MicroSphere Refiner
Microsphere Drug Production: Redefined
The MSR™ MicroSphere Refiner is a cGMP piece of equipment that allows drug developers and manufacturers to complete a wide range of aseptic processes with their microspheres at various scales. It is a one-of-its-kind solution has been developed and refined over decades following a Quality-by-Design (QbD) approach, taking into account the characteristics of microspheres and process behaviour.
Due to their characteristics and properties, polymeric microspheres have traditionally been known to be difficult to process for manufacturers – especially as the batch size gradually increases as part of the microsphere product development. The unique features of the MSR™ MicroSphere Refiner were pioneered by analysing these systemic industry challenges and developing a better understanding of microsphere processes with end-users directly in the field.

Advanced Features of the MSR™ MicroSphere Refiner
Combined processing steps, increasing overall yield
Robust, automated processing, removing operator variability
Configurable recipes for repeatability and traceability
Fast-tracks qualification and process optimisation
Offers successful scale-up opportunities
Features & Benefits
The MSR™ MicroSphere Refiner is a Current Good Manufacturing Practice (cGMP) piece of equipment that allows drug manufacturers to complete a wide range of aseptic processes with their microspheres at various scales. It naturally maximises product recovery, batch repeatability and production flexibility as it is capable of completing the following processes in one single system:
> Microspheres Classification/Filtration/De-watering
> Microsphere Washing
> Microspheres Drying, including Freeze-Drying
> Microsphere Sampling
> Microsphere Discharge/Recovery


The MSR™ MicroSphere Refiner is a fully automated system designed to remove manual product handling by operators throughout production. This enables maximising batch-after-batch reproducibility while minimising the risk for human error. Production can start at the touch of a button and pre-designed process recipes can be initiated.
The PSL automation platform allows drug manufacturers to pre-design and pre-load software process recipes incorporating the relevant process parameters suitable for their specific production requirements. This adds speed and flexibility to their manufacturing processes.
PSL can comply to major international practices and regulations for software automation, including GAMP5 (Good Automated Manufacturing Practice, version 5 by ISPE) and 21 CFR Part 11 established by the US FDA for electronic records and signatures.

As Microspheres are extremely valuable medicines to develop and produce it is vital that drug manufacturers maximise their product recovery in order to secure their competitive position in the global market. The core features of our MSR™ system were designed with this crucial requirement in mind.
The product recovery method of our MSR™ MicroSphere Refiner is unique as it is fully automated and it does not require any manual product off-loading by operators through an aseptic isolator, for example. Being an all-in-one solution, the MSR™ method also minimises the number of transfers and connections to aid maximising product yield.

The MSR™ is a Good Manufacturing Practice (GMP) piece of equipment, suited to multi-product applications. It is designed to allow end-users to remain agile and quickly adapt to changing production requirements.

The implementation of Process Analytical Technology (PAT) in the pharmaceutical industry is encouraged by the US FDA to ensure better product quality control and quicker time to market.
The MSR™ technology has embraced the PAT initiative as it allows drug manufacturers to complete real-time monitoring of their microsphere product quality and integrity during various production stages such as filtration and drying processes (including lyophilisation).
The integration of PAT reduces the trial-and-error approach. This helps drug companies move towards right-first-time manufacturing and reduces drug development times for microspheres – traditionally more demanding than regular drugs.

Developing complex drug formulations such as microsphere delivery systems has traditionally been challenging for most drug manufacturers, big or small. Ensuring that the chosen process technology used at R&D stage can be fully scalable to larger production batches is crucial. Finding out too late that a microsphere process is not scalable can have devastating impact and cost millions of dollars to drug manufacturers. The MSR™ product range was designed to simplify the scale-up development of microsphere drugs, from early R&D activities to GLP batches and then from clinical trials to commercial production. Our solutions can ensure that key process objectives (such as product yield, product quality and integrity, batch consistency, etc.) and key production parameters (such as filtration time, washing time, drying time, etc.) can be maintained at every scale.

Need help identifying the right solution for your process?
Completing our online questionnaire leads to timely, informed and efficient discussions.
Please take a minute to confirm your process requirements by completing the MSR™ Microsphere Refiner online questionnaire.
Applications and Options
| 0.05 Model | 0.125 Model | |
|---|---|---|
| Typical Product Cake Volume (process-dependent) | 1.25 – 8.7L | 3.1 – 21.8L |
| Maximum Liquid Volume | 98L | 123L |
| Equipment Dimensions (L x W x H) | 2,720 x 2,850 x 2,760mm | |
| Standard MSR™ | Upgrade Options | |
|---|---|---|
| De-watering Method | Suitable for Single Pass and Loop De-watering | |
| Filtration Step(s) | Single Filtration (Refiner) | Dual Filtration (Scalper + Refiner) |
| Drying Method | Suitable for Vacuum Drying and Freeze-Drying | |
Additional Information
Find Out More
If you are looking for more detailed information on the MSR™ Microsphere Refiner, download the brochure here.

FAQs
The MSR™ contains various engineered filtration areas that use filtering mesh. The mesh provides a cut-off point for removing undersized particles/debris. In order to achieve the correct porosity against your desired particle size distribution (PSD), filter mesh is interchangeable.
Yes, the MSR™ MicroSphere Refiner platform allows for freeze-drying as a process option. Bulking agent (typically Mannitol) can be introduced into the vessel before performing a typical batch freeze-drying cycle. The agitator helps break the sublimated cake back into a free-flowing powder form.
No, this is not possible. The MSR™ has been developed to overcome the challenges of processing microspheres once they have been created, i.e. product washing, product drying, an efficient harvesting method, etc.
Various methods for creating microsphere do exist and PSL can guide you to industry partners for assistance with emulsification, coacervation, membrane emulsification, spray drying, etc.
The PSM contains all the relevant components required to provide full automation and precise control of the process parameters. Valves, Sterile Filters, Regulators, Various Transmitters (flow, temperature, pressure etc.), Steam Traps and the relevant Distribution Piping all integrate into the MSR™ software package.
For the Clinical Trial/Commercial range, the MSR™ Platform is a Plug & Play offer. You only need to connect your upstream process, a waste line and common utilities (electricity, compressed air, nitrogen, clean steam) and our Platform would take care of the rest via the PSM and Integrated Ancillaries (Vacuum Pump Skid, Temperature Control Unit).
We understand the importance of documentation and traceability when developing or producing pharmaceutical drugs. This is why the MSR™ platform includes all the requirements to support your organisation: full audit trail, redundant SCADA, batch reports,… under 21 CFR Part 11 Compliance.

