During the recovery and subsequent handling of waste powder, the issue of containment is vital. Hanningfield’s Uni-Dust cyclone uses a fully contained, GMP solution for safe-change between batches. Below is a description of how the Uni-Dust cyclone safe change system works.
Method of Operation
During operation, the Catch-Pot Isolation Valve is left in the ‘open’ position, allowing material to pass into the Catch-Pot. At this stage, the Safe-Change Isolation Valve should be in the ‘closed’ position. As the material level builds up, this can be monitored using an optional sight glass or alternative control method, such as a level sensor.
Once enough material has built up in the Catch-Pot, close the Catch-Pot Isolation Valve and open the slide valve on the High Containment Transfer System, using the clip mechanism to seal off the internal seat. The material is now ready to be discharged into the Chargebag, which can now be achieved by simply opening the Safe-Change Isolation Valve. The material will now flow into the Chargebag until the Catch-Pot is empty.
Once transfer is complete, close the slide valve on the High Containment Transfer System and change the Chargebag station to the ‘Unlocked’ position. The bag is now fully sealed and will detach from the assembly. To fit the new bag, simply raise dock it into the assembly and change the Chargebag station to the ‘Locked’ position. Close the Safe-Change Isolation Valve and open the Catch-Pot Isolation Valve – the system is now ready to operate again.
Note: isolation valve optional and may not be required for some applications
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