Air and Screw compressors

Air and Screw compressors

Air compressors happen to be one of the most popular used items within the manufacturing, construction and automotive industry. Air compressors provide the power that is needed to run tools from pressure washers to paint guns and sandblasters. You need to make sure that you are buying the right kind of air compressor for what you need.

There are two main types of compressors the air and rotary screw compressors. You need to take the time to ensure you have made the right determination when it comes to choosing between the two types. The main feature between the two is the method by which it generates the pressure. An air compressor utilises its crankshaft powered pistons. These pistons work by moving back and forth within their cylinder as they compress the air inside the tank.

screw compressor

The rotary screw air compressor works by a different mechanism. Instead of pistons, the compression is accomplished through the use of rotation from intermeshed helical screws. These are also known as rotors which have a screw that spins in sync with one another that pushes the air inside the tank.

The components and the heat

With the pistons, the air compressor has many other related wear components. The components include valves, crankshafts and connecting rods. The number of elements that are needed for the operation of an air compressor will increase the vulnerability to breakdowns and damage. The rotary screw has a simpler working system. The compression only needs two rotors that don’t come in contact so they will remain free of problems for longer. Due to the two rotors that are rotating in concert without touching will generate hardly any heat due to the lack of friction.

The operating temp of a screw compressor will come into the category of around 80 to 99 degrees Celsius. Air compressors produce a lot more internal friction so their working temp can get to around 150 to 200 degrees. The warmer the environment means there will be an increase in the air compressors wear and tear.
The hotter the air compressor gets means it will need an intensive cooling system. The screw compressors are air-cooled, which is a trait that they share with the smaller version of the air compressor. The larger air compressors will generate too much heat so they will require a water cooling system.

Having a system like this will bring in additional maintenance needs like more frequent repairs and inspections needing to be done.

Pressure and the noise level

The air compressor has an advantage here when it comes to how much pressure they can produce. Most of the air compressors are capable of producing around 250 psi of pressure. The screw compressors sit roughly around 90 and 125 psi. Due to the higher pressure from the air compressor, it comes with a louder noise level. The air compressors are much noisier with the noise levels sitting above 80 decibels. Noise can be problematic when you are working in different environments, and you may end up needing noise isolation tools.

There are many facts that you need to take into consideration when you are looking at buying either a screw or air compressor. Ensure you carry out some research before you go ahead and make the final decision. Seek the advice from an expert if you are unsure which type is best suited for your needs.


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