Due to a new bearing and shaft design it is possible to increase the maximum admissible differential pressures to 25 bar in the process gas compressors VRa 236 H and VRa 336 H. Thus, with a multi-stage unit discharge pressures of up to 53 bar abs. can be reached.

Tags: Aerzen, compressors, screw compressor, oil-free screw process gas compressor, Aerzen USA

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. 

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

The majority of all operating manuals provide the equipment user with a time based plan when to change the machine’s oil.  This interval is typically designed to protect the oil and subsequently the machine from breaking down prematurely in most if not all operating conditions.  So far so good.  This comes with a price tag as the machine needs to be properly shut down and locked / tagged out.  Besides of the obvious cost for the lubricant you also incur labor and potential production down time cost.  For most of the smaller machines requiring less than a gallon of oil for each change it may not make sense to go with a condition based lubricant change.  Experts fix what needs fixing and this applies here also.  For larger quantities it may make much more sense to go with an oil condition based oil change schedule. 

Tags: Aerzen, positive displacement, screw compressor, Aerzen USA, pd blower, turbo blowers, wastwater

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. 

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

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

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

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

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. 

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

Oil-free compressors are most often used in process gas applications. Hazardous, poisonous or simply dangerous gases are usually being compressed and conveyed by our screw compressors. It is critical therefore, that such conveying media be sealed against leaks to the atmosphere or, in the case of gases incompatible with lubrication oils, against leaks into the compressor's lubrication system. Dry gas sealing systems are often applied for such tasks.

Tags: Aerzen, positive displacement, rotating equipment, compressors, flare gas compression, screw compressor, oil-free screw process gas compressor, coke oven gas, lime-kiln gas, hydrogen, Aerzen USA, seal gas

Tags: Aerzen, positive displacement, rotating equipment, compressors, screw compressor, oil-free screw process gas compressor, pd blower, rotary lobe blower, turbo blowers, sliding vane compressor, oil-flooded screw compressor

 The refinery flare gas can be considered one of the most challenging, but it can be handled with the right compressor.

Tags: Aerzen, positive displacement, rotating equipment, flare gas compression, screw compressor, oil-free screw process gas compressor, coke oven gas, lime-kiln gas, hydrogen, sliding vane compressor, oil-flooded screw compressor, centrifical compressor, hydrocarbon combinations