difference between oil-free rotary screw air compressors and oil-flooded rotary screw aircompressors?

Feb 07, 2007 by big M | Posted in Engineering

 two types of compressors to be compared
ZR 55-8.6-50/E ATLAS COPCO VS LS200-100WC-75KW SULLAIR
ZR55FF-8.6-50 ATLAS COPCO VS LS160-75H WC-55KW SULLAIR

 One has oil, and the other doesn't? Objective a thought.

dose enyone know about aircompressors?

Jan 21, 2008 by G.O | Posted in Other - Science

 i have a trivial air compressor and i leave it on for like 30min sometimes longer then wen im about to use it it goes arise 80psi to empty in about 10 to 15 secs. does enyone have knowledge of whats wrong with it???
i have a unprofound air compressor and i leave it on

 You don't give enough communication to answer the question. Whether or not it is ruined depends on the maximum squirt rate your compressor can hand over at 80 psi, the size of the reservoir tank on the compressor, and how much stream you are drawing from it. For instance, your compressor might be rated at 1 cfm @

HPA, Compressed Air, Compressors, Nitrogen & High Pressure..

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Improve compressor efficiency at the Dirty 30

31.12.69

But this assumes the 60 cfm is consumed equally throughout the half a mo. If, however, the packaging machine requires 1-sec actuations, each consuming 10 cubic ft of air once every 10 sec at a pace of 6-cycles/min, the rate of flow becomes much higher than the average. Although the average surge is 60 cubic ft/min, the instantaneous rate of flow actually is 600 cfm during each 1-sec D. (10 cubic ft/sec x 60 sec/mine is 600 cubic ft/min). In this instance, the 1-in. channel run would have a pressure drop exceeding 30 psi. One way to overcome this could be to set the compressor crushing higher to compensate, causing the entire system to consume more energy.

When operating bullish displacement air compressors in the 100 psig range, every 2% decline in operating pressure requires about 1% less input power. For sample, reducing a 100-hp rotary-screw air compressor’s compressing set-point just 5 psi from 100 psig to 95 psig reduces the input power to compress air by 2.5%. At $0.10/kWh, this calculates to give $1,900/year in energy cost reduction. Calculated vitality cost reduction is based on the compressor running at full capacity, operating 8,760 hours per year with a motor effectiveness of 93.6%. In addition, a decrease in system operating pressure reduces compressed air consumption at unregulated end users.

Source: Plant Services

bicycle tires and tubes – A Coleman Air Compressor Gets the Job ...

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