|
Multi-stage Designed
Compressor
Multi-stage compressors are able to
improve efficiency of the compressors by achieving high pressures at a
particular set pressure. These types of compressors consist of separate
stages that are mounted side by side on the compressor. The stages can
be mounted in separate stators or within shared, multi-bore stator
housing. In the alternative, the stages can be mounted by having the
second stage pushed directly from the rear of the first stage.
When the lubricant is injected into the compression chamber, the
temperature is often controlled directly or indirectly. It can be
directly controlled to a minimum of 140 degrees Fahrenheit; or it can be
controlled indirectly by managing the discharge temperature. The desired
temperature may be maintained through a wide range of encompassing
temperatures through a thermostatic bypass valve which enables some, or
all, of the circulated lubricant to bypass the lubricant cooler.
In order to achieve correct lubrication and sealing, you must have the
appropriate temperature and consistency. This will also prohibit
condensation in the lubricant sump. Excessive temperatures must also be
avoided, as this could cause the breakdown of the lubricant and reduce
the life of the lubricant. An after cooler is also utilized in order to
cool the air that is discharged; and a moisture separator removes the
condensate. Air-cooled lubricants, as well as radiator-type lubricants
and air coolers are utilized in most instances in order to provide heat
recovery from the compression procedure for facility heating.
Water-cooled heat exchangers that contain water control valves are
offered on most rotary screw compressor units in water-cooled designs.
For use with multi-stage designs, the lubricant can be taken away and
air-cooled in an intercooler between stages. In the alternative, the
air/lubricant blend is able to pass through a barrier of lubricant when
it goes into the next stage.
For use with single-stage designs that are injected with lubricant,
rotary screw compressor packages are obtainable from 3 to 900 hp or 8 to
5000 cubic feet per minute (cfm) that contain discharge pressures from
50 to 250 psig. The two-stage designs are able to decrease a specific
amount of power and some designs can attain discharge pressures as high
as 500 psig.
Rotary screw vacuum pumps which are injected with lubricant are
accessible from 80 to 3,100 inlet cfm and vacuum to 29.7 inches Hg.
There are fewer types of rotary compressors that are lubricant-injected
rotary vane types. These are available in a limited size range.
Resource
links
↔
Air compressors guide
↔
Tools
↔
Tool Related |
usingaircompressors.com
About air compressors
Industrial Air
Compressors
Natural Gas-Driven Air
compressors
air
compressors information
Terms and Disclaimer |
