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

How To Choose The Right Blower For Wastewater Treatment (Podcast)

Posted by Tom McCurdy on Thu, Nov 08, 2012 @ 10:53 AM

Three main blower technologies are condsidered for waste water treatment applications:

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

An Engineer's Mini-Guide To Blower Technology Selection

Posted by Ralph Wilton on Mon, Oct 22, 2012 @ 03:35 PM

Turbo Blowers. Positive Displacement Blowers. Hybrid Rotary Lobe Blowers. Which one should you choose for your wastewater treatement application? How much energy can you really save? Who can you trust to give you an objective answer? The best place to start is by downloading the Engineer's Mini-Guide To Blower Technology Selection.

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

Real-time Condition Monitoring For Blowers And Compressors

Posted by Inquires At Aerzen US on Mon, Jun 25, 2012 @ 09:21 AM

The Aerzen iAir Remote Monitoring System (RMS) is a comprehensive monitor that can be attached to any blower or compressor to capture real-time activities and conditions. Based on industrial cellular technology, the RMS can function in any location with cellphone coverage for both indoor and outdoor applications. The system is easily installed and linked directly to your cell phone for up-to-the-minute condition reports and notifications. This allows for peace of mind and troubleshooting when you are not accessible to the equipment.

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

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

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

Lowering start-up power draw with across the line start - PD blower

Posted by Ralf Weiser on Mon, May 02, 2011 @ 04:36 PM

The most common motor start is what is commonly known as “across the line” (direct) motor start.  Power companies like when consumers do this as the resulting power draw (Amperage) spike is typically assessed with so called power demand charges on top of the regular power consumption charge in cents/kWh.  In any application where the blower or compressor must start against header pressure this starting method carries the greatest penalty as the motor must overcome the rotating equipment’s moment of inertia and the system pressure.  The graph below illustrates the power draw and the time it takes to bring the blower / compressor on line.  An Aerzen Aeromat automatic start-up unloading valve may be the answer to your problem. 

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Tags: positive displacement, 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

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