Machines and Colloid Mills for Fertiliser Processing
Machines and Colloid Mills for the Processing of fertilisers
Probst & Class develops and produces machines and equipment for the processing of fertilisers.
Every end product needs its own bespoke machine configuration.
Our strategy for perfect customisation: puclab.
Efficient processing of diverse nutrient formulations
Liquid and suspension fertilisers often combine dissolved salts, chelated micronutrients, finely milled solids and—where required—oil-based additives. These heterogeneous phases must be brought together to form one stable, storage-ready product without causing precipitation, sediment build-up or phase separation. PUC colloid mills supply the shear energy needed to disperse every component down to the micrometre range and keep it permanently suspended.
Consistent quality batch after batch
Whether you run highly concentrated NPK solutions or micronutrient suspensions, the precisely engineered rotor–stator system breaks down agglomerates and delivers a tight particle-size distribution. Clog-free spraying and uniform nutrient availability are maintained from the first to the last liter of every batch.
Reliable performance with high-viscosity concentrates
To trim logistical costs, many fertilisers are traded as viscous mother liquors or gel suspensions. Conventional agitators quickly reach their limits here. PUC colloid mills handle such heavy substances with ease while simultaneously providing the power to move the product through the shear gap—eliminating the need for an auxiliary pump. The result is a compact, safe processing line with lower capital and operating expenditure.
Clean, residue-free manufacture
Trace carry-over from one batch can distort micronutrient levels in the next. PUC mills drain almost completely and, thanks to a design free of dead space, can be cleaned quickly. This reduces product loss and shortens downtime.
Flexible integration and long-term spare parts availability
All models are available in batch and inline configurations and integrate seamlessly into existing mixing, dissolution or filling systems. ATEX-rated versions can be supplied for flammable additives. A secure, long-term spare parts supply underpins sustainable operation and protects your investment.
Whether you are producing clear solutions, suspensions or multi-phase blends, PUC colloid mills enable you to manufacture fertilisers that are stable, high quality and cost-efficient.
Find your ideal machine, reliably and quickly
In the almost 100-year history of Probst & Class, there is one constant: Practically every end product needs its own individual machine configuration!
Two special features of Probst & Class guarantee the highest satisfaction and loyalty of our customers: The simple convertibility of our machines and our approach to customisation.
What has been part of our success for decades is now a strategy. We call this strategy puclab.
puclab is more than a development lab
- System consulting: Holistic concepts for the construction of new systems and the conversion of systems to other products
- Outsourced R&D for our customers' wet grinding, mixing and degassing processes
- Preliminary trials to help decide on the optimal process
- Further development of processes in case of changed specifications
- Application database with test set-ups, test results and videos

puclab – Pilot
Make an appointment for preliminary tests in our pilot plant.
We give you and your product as much time as needed. Together with your technicians/engineers, we determine the best possible configuration for your new PUC machine in our test lab and plan its integration into your process.

puclab – On-Site
Test a PUC mill in your plant or laboratory.
Talk to our technical support to define the requirements for your process and product. We then provide you with a suitable machine, free of charge, and offer support for your in-house trials.

puclab – Remote
Send us your raw materials for testing.
Based on your specifications and materials, we determine the best machine configuration for your end product in our technical centre. Using different grinder sets and settings, we can calculate within a few hours how your new PUC mill needs to be configured, without charge.
Contact our sales department
Still unsure about the best way to proceed?
Simply contact the sales team. We are happy to help you.
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