High Shear Mixing FAQs

Q: Does Silverson sell used equipment?

A: No. But Silverson does have an extensive fleet of demo machines that are used for its on-site trial program, which it sells at a discount.

After service in the field, these demo machines are stripped down, cleaned, recalibrated and in essence, in the same condition as a new Silverson machine.

Q: Do you service second-hand Silverson equipment?

A: Yes, for an hourly rate (two-hour minimum) plus travel and expenses, a highly-trained Silverson engineer will perform service work on used Silverson equipment.

Q: How do I know if a Silverson mixer I buy through the Internet will work for my process/application?

A: Honestly, you don’t.

Many Silverson machines are customized to fit specific processing conditions, so they are not one-size-fits-all and may not work for another application. Another problem is used machines may no longer be in spec. Wear and tear increases the gap between the rotor and the stator, which decreases the efficiency of the machine.

“The problem with the second-hand market is customers don’t know what they’re buying,” explains Alan Pepper, head of manufacturing, Silverson Machines. “That’s the danger. Often when a customer calls us they subsequently find out the machine they’ve purchased is not suitable for their application.”

Q: Can Silverson refit a used machine to work in my application?

A: Possibly, it depends on the machine and the application.

Keep in mind though, refitting a machine can often be quite costly. Any savings from buying a second-hand machine may evaporate while getting it into an operational state. You may end up spending, as much or more as you would to buy a new Silverson machine that is fully supported through installation with an accompanying warranty.

Q: Do you sell parts for used Silverson mixers?

A: Yes. You’ll need to know the make and model of the machine before contacting Silverson.

Q: We machined a new part for our Silverson mixer and now it doesn’t work the same. Why is that?

A: Silverson Machines are built within very tight tolerances through precision engineering for exceptional performance. Non-OEM parts simply do not perform the same and can ultimately cause catastrophic failure of the machine.