Air Compressor Unloader

Air compressors are mechanic devices that take in air and then compress and store it in a compressed form (meaning, it occupies less space than in its normal state). Air compressors are equipped with a tank that holds the compressed air inside. The tank is able to withstand all the pressure that the air applies inside it, but there are always signs that warn the user that damaging the tank can result in an accident.

One major difference between the various types of air compressors is that some of them are oil-lubricated while some others are not. Those that are not oil lubricated are also called oil-free compressors. Oil-free compressors boast the advantage that they don’t need oil in order to operate, while oil-lubricated compressors do. Additionally, oil-lubricated compressors need to have their oil changed after certain periods of operation.

Another difference that can be seen among air compressors is that some of them are stationary (meaning they are static or unmovable), while some others are designed from scratch to be portable. Common air compressors are not used for industrial purposes, and they occupy the same volume as a medium-sized table. This type of compressor usually comes with built-in wheels in order to be more portable. However, air compressors aimed at industrial use can occupy areas larger than one, two, or even more rooms. These compressors are not intended to be moved more than a few times during their lifetime. Moving these compressors requires money as well as good planning.

Air compressors can be found in homes, small businesses, service stations, or in large industries. Their usage ranges from dust cleaning to heavy industry usage (inside machinery) and gas turbines. Air compressors play an essential role in the correct operation of many devices and procedures.

Compressors provides detailed information on Air Compressors, Compressor Parts, Compressors, Gas Compressors and more. Compressors is affiliated with Electric Pressure Washers.

Tag: air compressorsair compressors

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Posted on June 18th, 2008 by itbsuperrich
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With the advent of the small PLC’s (programmable logic controllers), the Logo or the Pico to name just a couple, controlling pneumatic circuits can be achieved with high reliability, low complexity, and at a relatively low cost with one of the currently available, easy to program controllers.

That’s all well and good for the vast majority of applications that occur in a plant environment that offers electricity. But what if yours doesn’t? Or, what if you would prefer to have a non-electrical compressed air circuit, one that is, perhaps, located in an explosive or fire hazard location?

Years ago, there were no options but using air logic to control compressed air applications. For more modern applications that may need to operate without electricity, air logic still offers a viable alternative.

There are commercially and readily available air logic elements that will help you design the air-only pneumatic circuit.

OR Gate

This device will allow an output control signal when either of two incoming air signals are present. The output air signal is continuous as long as there is an incoming air signal. This is useful when you wish to sequence a pneumatic operation, but don’t want it to occur until another operation is complete.

AND Gate

This device will allow an output signal only when there are two input air signals received. The output air signal is continuous as long as there are two incoming air signals. This is useful when you wish to sequence a pneumatic operation, but don’t want it to occur until other operations are complete.

NOT Gate

Sends an output air signal continuously when the incoming air signal is absent. This type of device is often used to ensure that a sequence cannot take place until another action is complete.

PULSE

This device will allow a momentary output signal to trigger a sequence operation, and the output signal will drop after it “times out”. This is useful for simplifying control circuitry eliminating the potential for conflicting control air if the pneumatic circuit hasn’t been designed properly.

TIMER

These devices can either generate an outgoing signal for a specific period of time or, delay an outgoing signal for a specific period of time when either receives in input air signal.

INDICATOR

These devices are used when there is a need to have a visual indicator that there is compressed air present. Some might change colour, others might have an indicator pin that pops up to show air is there. Of course, a pressure gauge would do the same thing, but perhaps it might be beneficial to be able to see that there is air present from a distance?

POSITION SENSORS

By having an object interrupt an air flow, or have the air flow within the sensor uninterrupted, will produce an outgoing air signal.

These are just a few of the many other air logic components and devices commerically available. With these items, air logic can be used to build quite complex air control circuits.

Caution: the compressing of air generates a great deal of water, and air / water borne contamination in the air lines to the plant which can be a real problem for downstream air components.

Air logic devices are just such downstream air components. It is critical for their reliable operation to have the air supply to these sensitive control elements clean and dry. Failure to provide air of sufficient quality will ensure that the air logic control circuit will not function to design or expectation.

Bill Wade is a former President, Marketing Manager and Sales Manager of a number of companies that use and sell compressed air related equipment and supplies. He currently represents a select group of companies and writes about air at http://www.about-air-compressors.com.

Tags: air circuits, air circuts, air compressors, Air logic, and gate, Compressed air, not gate, or gateair circuits, air circuts, air compressors, Air logic, and gate, Compressed air, not gate, or gate

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Posted on June 16th, 2008 by itbsuperrich
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