Rotary Air Compressors with Positive Displacement

Browse the Full Range of Air Compressors HERE

All orders processed through Amazon for the best possible service.

When you need a short burst of energy to accomplish something, you'll need to enlist the services of air compressors. Work requires kinetic energy, and air compressors trap and condense air into pressurized form allowing it to do work such as convert electric power or gas to kinetics. They come primarily in two flavors: non-positive displacement compressors and positive displacement compressors. First the non-positive displacement models. They're primarily centrifugal compressors - such as fans and blowers. They use an impeller that spins to create the centrifugal force which traps and manipulates the captured air, decelerating and accelerating it. And then? compression occurs! Non-positive displacement air compressors are widely used in industry because they have fewer parts that rub together when compared to positive displacement models, but to their disadvantage non-positives cannot achieve as strong a compression ratio without taking up more space and power.

Positive displacement air compressors, on the other hand, use pistons driven by a crankshaft, much like standard car engines, to forcefully (and sometimes explosively) compress air in a chamber for use in work. Flowing from the suction manifold to the compression cylinder through the action of helical screws, air gets smashed by the crankshaft driven piston before being released.

We use compressed air for many purposes, mostly in industrial situations that people don't pay much attention to in everyday life. If you've ever flown in a pressurized airplane (which is all of them) you've been at the mercy of an air compressor, making sure the cabin contains enough oxygen for you and your air compatriots to continue breathing till your destination. Air conditioning and refrigeration units use air compressors to remove heat from surrounding air and cool their charges. Obviously the combustion engine in your car is an aforementioned example of air compressor use, but oil refineries, pipelines, chemical plans, and natural gas plants all use many compressors to provide the hidden products we use in our everyday lives. For more industrial uses often a multi-stage compressor is used so the compressed products of one stage can be decoupled from the pipeline and saved for future use, increasing efficiency and allowing large industrial plants to reduce costs by selectively running their equipment rather than full 100% time use. Due to their size and expense and specialized use, multi-stage setups are rarely used in non-commercial settings - there's really no reason day to day compressing needs can't be fulfilled by single stage air compressors.

There are plenty of other uses for compressed air, uses that are closer to home. Have you ever used a nail gun or power sander? How about a stapler or spray gun? Or a powered wrench? If you've used any of those before, you've used compressed air to help you accomplish whatever it was you were doing. Next time your computer keyboard has too much junk in between the keys, or you open your case and all your computer components are covered in dust and debris, it's time to break out the can of compressed air can and blast your way through to cleanliness and problem-free computing.

Air Compressors Basics

An air compressor is a device that pumps air in small bursts, by converting electric power into kinetic energy by compressing air.

Air compression is basically increasing the amount of air in a particular space.

The best example of an air compressor are the lungs in the human body.

Air Compression can be:

·      Positive displacement

·      Non-positive displacement

Positive displacement can be :

Piston type

Rotary screw compressors

Vane compressors

Positive displacement compressors force air into chambers where their volume is compressed.

-       Piston air compressors pump air into a chamber by the use of the motion of pistons. Unidirectional valves are used to guide air into chambers where it is compressed. The manner in which they work is very similar to that of an internal combustion engine but more or less in a reverse manner. They have pistons, valves, cylinders, housing blocks and crankshafts.

-       Rotary screw compressors work on the principle of air filling into a void that is present between two helical mated screws. As these screws are turned, the volume will be reduced, which results in increased air pressure. They have large rotors that are supported by roller bearings on the drive end and back to back ball and roller thrust bearings on the non drive end. It matches two helical screws that, when turned, guide air into a chamber, the volume of which is reduced as the screws turn.

-       Vane Compressors. In an air tool, compressed air enters the smallest compartment of the vane-housing at shop pressure, usually at 90 PSI or higher. They use a slotted rotor with varied blade placement to guide air into a chamber and compress the volume. It drives the vane mechanism inside the tool in a rotary motion. The compressed air is 'trying' to get from an area of high pressure back to atmosphere, thus moving the vanes as it drives to the exhaust port of the tool. In-plant installations of Rotary Vane Compressors are most commonly driven by an electric motor.

Building and road repair equipment use this kind of compressors.

Non-positive-displacement air compressors include centrifugal compressors. These devices use centrifugal force to pressurize air, generated by a spinning impeller to accelerate and then decelerate captured air.

Compressed air can be used for a variety of purposes:

·      It can alter the chemical composition while making fertilizer

·      It can be used in production lines

·      It can be used to maintain industrial plants

·      It is used to make air powered nail guns, staplers, sanders and spray guns.

·      It is used in refrigerators

·      Used to compress oxygen in cylinders for medical purposes

·      For heating and cooling systems

·      In power plants to provide energy.

·      They are used to fill air in vehicles

Compressor pumps maybe oil lubed or oil less and depending on the use, the right one has to be selected.

Air compressors are extremely valuable and over the years have evolved into irreplaceable parts of industrial equipment. They are useful tools and have a wide variety of applications.

Choosing an air compressor is a matter of figuring out your budget, as they can be very expensive depending on power, output, and power usage. Choose a solution that just barely gets your job done. Get one that's out of your budget or requirements and there is unnecessary waste of resources. These days compressors rarely run on hand-cranked manual power, you'll most likely be dealing with an electric or gas-powered model.