I expected that this blower rated at 250°C would be at the bottom end of high temperature blowers but no - some units were given the same designation yet could only operate at temperatures that were 100°C lower. Some units had operational ceilings that were twice as high as what this one was tested at but their "high pressure" turned out to be .3 psi or 2,070 pascals which implies that it turns relatively slowly. Low speeds are attainable with off the shelf bearings. Therefore, it is not a niche that is of interest.
The version pictured is currently on the test bench where it is subjected to high temperature moist air. Previous tests of off the shelf blowers demonstrated bearing corrosion in less than 100 hours. It is possible that had it been a continuous test the bearings would have survived longer but running tests that lasted a few hours compromised the bearings too soon.
We are currently using the blower to fluidize and roast beans (coffee and others). The pressure output of over 1 psi ( 6,894 pascals ) at 250°C could certainly fluidize denser materials at a lesser depth. At these temperatures the blower could be the heart of a monstrous pop corn pumper. With continual introduction of kernels the output will compete with Vesuvius. Such a machine would have to be brought to corn country Taber for testing.
A recycled hot air requirement is fundamental to this niche, otherwise it is more efficient to heat the air after the blower i.e. an air knife. Now, if a high temperature air knife was in a closed system nearly every blower in the marketplace would be inappropriate.
Hot air accelerated drying in an industrial setting would require a moisture extraction process but if it is a recirculated hot air application this is a custom application.
Have a freshly roasted coffee and think of another application for the unit.
