Aerzen USA insights and guidance for blower, compressor and vacuum pump applications

Oil-free Air Conveying In Coffee Roasting Equipment

Posted by Aerzen At Aerzen USA on Mon, Jun 02, 2014 @ 08:57 AM
Since its foundation in 1868 the Probat-Werke has concentrated with more than 600 employees worldwide on roasting machines and equipment for coffee and food industry. Until today, the world market leader has sold more than 110,000 roasting machines – from manual global roaster via fully automatic largescale roasters up to the new tangential roaster Jupiter Hybrid with which the most diverse roasting profiles can be prepared in one roasting machine.
For transport of the coffee, Probat prefers the pneumatic conveyance. As the
conveying air is in direct contact with the product, it has to be absolutely oilfree. For production of the conveying air as negative pressure, Probat has used Aerzen units since 1996.


In September 2012, Probat opened a new Research and Technology Centre. There, the conveying air required in the roasting machines is generated by two Delta Blowers Generation 5 and one Delta Hybrid. Upon storage of the green coffee into silos with overpressure between 1,000 and 2,000 mbar, the Delta Blower is used, also during transport to the roasting machine with positive pressure.
The Delta Hybrid is responsible for transport of the particularly sensitively
roasted beans to the roasted coffeesilos and to bagging station with negative pressure as well as for transport to grinding plant with overpressure. The Delta Hybrid unit generates a negative pressure of 300 mbar on suction side as well as an overpressure of 600 mbar on discharge side. Therefore, a conventional blower unit could be replaced acc. to the principle “Two become
one”.
Again, two Delta Blowers transport the ground coffee to the ground coffee silos and to the packaging machines with negative pressure. As an alternative, however, the Delta Hybrids can also be used. The required differential pressure is decisive for the selection dependent on the piping length and the specific energy advantages of the Hybrid.

All Aerzen units are fully automatically integrated in the process of the roasting equipment and are switched via a superordinated intelligent SPS control depending on the program. The respective blower units are driven with a constant volume flow whereby the pressure is built up depending on conveying capacity and pipe length. Thanks to a bypass solution, Aerzen
had developed together with Probat, a part of the volume flow can be led back from discharge to suction side for the positive pressure units.

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Tags: Aerzen, rotating equipment, rotary lobe blower, pneumatic conveying, Hybrid Blower, Coffee Conveying

Aeration Blower Saves $44K Annually For Wastewater Treatment Plant

Posted by Aerzen At Aerzen USA on Mon, May 06, 2013 @ 04:38 PM

The segment from WaterOnline Radio features interviews with John Franz, wastewater treatment plant manager for the City of Anacortes, WA, as well as Kevin Grant, a regional sales manager for Aerzen USA.

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Tags: Aerzen, positive displacement, rotating equipment, Aerzen USA, pd blower, rotary lobe blower, turbo blowers, blower sizing, wastwater, water treatment, WWTP, aeration

A Turbo Blower for the Base Load, PD Blower for the Peak Load

Posted by Tom McCurdy on Mon, Apr 15, 2013 @ 10:27 AM

A biological municipal wastewater treatment plant with a considerably fluctuating discharge quantity can only perform its function with utmost energy efficiency and reliability if the process air consumption of the aeration basin can be adjusted continuously and is fully automated in order to deal with widely fluctuating load quantities. The example of the wastewater treatment plant shows how this is achieved with the use of a speed controlled Aerzen turbo blower.

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Tags: Aerzen, positive displacement, rotating equipment, Aerzen USA, pd blower, turbo blowers, blower sizing, wastwater, water treatment, WWTP, aeration

Trucking – Pay now, or pay later

Posted by Ralf Weiser on Thu, Jul 07, 2011 @ 11:14 AM

Shipping damage is the top number one issue followed by scheduling and only then cost.  It is amazing how much freight gets damaged per year.  This is particularly true for new blower packages that are shipped via LTL (Less than truckload) and so called common carrier.  Although deemed the most cost effective – expediting and broker companies managed to push the cost down - it is the most difficult way to get machinery to a job site undamaged. Because freight must be consolidated in the carrier’s main hubs the equipment must be moved often.  The mostly heavy and odd shaped freight with uneven weight distribution is moved with fork trucks that are significantly undersized.  Making things worse is the fact that logistics is a business model where people make Cents on a Dollar and thus the time freight spends in non value adding moving around within terminals is kept to an absolute minimum causing fork lift drivers to drive fast and furious.  Freight gets shoved around, stacked (when it should not be) and dropped rapidly (giving drop-shipment a different meaning).  The result is that sound enclosures, castings, instrumentation etc gets damaged significantly before it even makes it to the final destination. 

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Tags: Aerzen, rotating equipment, screw compressor, Aerzen USA, pd blower, rotary lobe blower, turbo blowers

Making A Shop Air Compressor Green(er)

Posted by Ralf Weiser on Thu, Jun 02, 2011 @ 09:49 AM

Plant air is a known energy sink and you may not think of a shop air compressor as an area that can be made more sustainable.  At Aerzen’s LEED certified facility in Coatesville we initially were not able to improve upon old concepts at first either.  During the course of the last three years we were able to make significant changes to reduce its environmental impact. Adding an electronic controller, variable speed drive, remote monitoring and recycling waste heat did a fantastic job reducing the carbon foot print of the compressed air system.  They are simple ideas that you can implement in one way shape or form.  Your bottom line may be affected by this more than you think. 

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Tags: positive displacement, rotating equipment, compressors, screw compressor, oil-free screw process gas compressor, Aerzen USA, oil-flooded screw compressor, pneumatic conveying

Top 5 Questions To Ask When Sizing A Blower System With A Vacuum Pump

Posted by Bruce Impey on Sun, May 22, 2011 @ 06:22 PM

In order to properly size a blower system with a vacuum pump, there are five main requirements to consider:

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Tags: Aerzen, positive displacement, rotating equipment, screw compressor, Aerzen USA, pd blower, rotary lobe blower, blower sizing

Of Pipework And Other Surprises During Blower And Compressor Start-up

Posted by Ralf Weiser on Mon, Apr 11, 2011 @ 10:14 AM

Day of start-up is always an exciting time as all the long hard work of engineers and construction folks can finally show off what they have worked on for typically a long time.  Most focus is placed on equipment, infrastructure, controls and plant processes.  One item that is often underestimated in air and gas moving equipment is the pipe-work that connects primary air movers and the process.  Materials of construction, alignment, thermal growth allowance and most of all cleanliness continue to be one of the most unique challenges start-up engineers continue to encounter. 

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Tags: positive displacement, rotating equipment, Aerzen USA, pd blower, rotary lobe blower, pneumatic conveying

Air filter maintenance: Impact on efficiency and machinery health

Posted by Ralf Weiser on Wed, Mar 30, 2011 @ 08:38 AM
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Tags: positive displacement, rotating equipment, compressors, screw compressor, Aerzen USA, rotary lobe blower, pneumatic conveying

PD Blower "Free" Oil Analysis - There Is Usually A Good Reason For It

Posted by Ralf Weiser on Thu, Mar 17, 2011 @ 11:11 AM

Oil analysis and vibration analysis make a great tag team when it comes to assessing rotating equipment condition.  Even if oil analysis trending is carried out by itself it still can be a powerful tools assessing whether or not there may be trouble coming down the pike – rolling element bearings, gears and other key components leave key evidence of them failing behind in the lubricant.  Depending on your plant size and usage of lubricant, quite a few lubricant suppliers also offer free oil analysis.  While that seems great at the first glance, there are quite a few wrinkles that can lead straight to catastrophes that the analysis was supposed to help prevent.  I will review a few issues and elaborate on what an analysis report should cover in the course of this blog. 

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Tags: Aerzen, positive displacement, rotating equipment, screw compressor, pd blower, rotary lobe blower, turbo blowers, WWTP, pneumatic conveying

Preventive Maintenance or Precision Maintenance?

Posted by Ralf Weiser on Mon, Apr 12, 2010 @ 10:35 AM
Have you ever pondered the term of "preventative" maintenance?  Well, I have often done so and must admit that I had to laugh when I pictured how this was supposed to actually work in a plant setting.  It conjured up visions of maintenance people getting a "call" from the machine controls in question and telling them to come in soon as one of the bearing will fail next Sunday night at 4:05am.  While we are closer than ever in diagnosing machinery problems and averting the worst from happening, we are not able to be able to exactly "predicting" when the usable time of a piece of equipment will come to an end.  Precision maintenance is when you identify, prioritize and implement a condition monitoring philosophy that is trending based and is designed provide a review process for any process and incident occurrence.    

Trending is the key to success with precision maintenance.  At Aerzen USA we make good use of state of the art condition monitoring devices that fit any budget.  From low cost vibration sensor based switches to full blown online monitoring systems ranging from IFM Efector's VKS, Octavis and Multiplex devices we have the trending system that will fit anyone's budget. 

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Tags: Aerzen, positive displacement, rotating equipment, compressors, Aerzen USA, pd blower, rotary lobe blower, pneumatic conveying

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