How to choose an air compressor for the house and the garage?

Air Compressor-quite a useful unit for both home and for the garage. especially if you have to do the repair work. But when choosing sometimes difficult, as this tool has a variety of technical parameters that should be taken into account to get the best device for the excitement of specific tasks and activities. In this article, we will talk about how to choose an air compressor.

Appointment air compressor

The compressor-a power tool that is capable of pumping compressed air, which is then used for the operation of various air tools, as well as for pumping automobile tires, tightening the screws on the machine and other a variety of attachments can be used to work: paint sprayers, blowers. Pneumodrill, and more. If necessary, you can even use special hubs, which will allow you to make a compressor, several tools.

The design includes elements:

The drive, which provides the main elements of the movement.
piston or rotor-main moving element
The receiver-a special container, which can have a variety of sizes or tank in which compressed air is injected and stored

When choosing an air compressor, it is necessary to immediately take into account the type of work, which can then be performed with its help. Not always the best-it's the compressor at maximum performance, since for different purposes require different airflow capacity

The compressor can be used with the following equipment:

pneumatic tools designed for painting walls, vehicles, etc.
wrenches and Pneumodrill;
blasting pistols
adapters for tire inflation;
rivet and nailing, etc.

Each of these tools requires a certain amount of air pressure and air consumption is different. For example, a spray gun will suffice 3-4 bar pressure and air flow rate to average 200-400 liters/min. But for the pneumatic wrench longer necessary pressure of about 6 bar and 300-500 l/min.

That is why we must first determine the order with which tool you have to work in order to know exactly the parameters of the air compressor, which is suitable. And it is always better to take the device with a margin of power.

What are the different types of air compressors?

Compressor units can be divided into two major subtypes, which differ radically among themselves according to the principle of work.

Reciprocating Compressors -in which the air is compressed by a piston reciprocating motion in a special cylinder
Screw compressors -here the principle of operation of another, compressed air while rotating the two rotors, which are arranged opposite each other

Table considered their main features, as well as the positive and negative sides of usage.

Type of compressor

Features

Benefits

Disadvantages

Piston oil-free

have a simple design direct drive. Piston group made of material with low friction.

Low cost.
Clean air outlet.

Have a small working life.
Poor cope with high loads.

Piston Oil

The moving structure elements to reduce friction require the use of oils.

Good performance.
Easy operation and maintenance.

Require oil level.
Not suitable for frequent and intensive use.

Piston belt

The design of the belt drive is used, which drives the compressor piston head.

High performance.
A stable and long-term operation.

Noisy during operation.

screw

in which air is injected sequentially through a screw pair rotating in a tank of oil which reduces friction.

High performance.
Suitable for day and night operation.
work almost silently.

The high cost.

The main technical parameters, which is necessary to look, choosing a compressor

Each unit has its own characteristics and technical indicators, directly determine their efficiency and productivity. And when choosing a model it is necessary to carefully examine all the characteristics. Among the most important are the following:

Operating voltage

Depending on the operating voltage level of compressors are divided into:

Single-phase -operate with a voltage of 220V, are most often used to solve a wide variety of household tasks.

Three-phase -operate with a voltage of 380 V, this type typically include powerful professional or semi-professional units.

It is worth to take into account that not all have the opportunity to work with three-phase equipment. If you want to buy a compressor powered by 380, before it is worth in advance to make sure that the garage there is a corresponding three-phase socket.

It is also worth considering. that the three-phase devices for operation requires more power than a single-phase.

Pressure

The pressure-measure of the force of the compressed air, which may in the process give this model compressor. This is measured in atmospheres or bars. In this case, there is no much difference as 1 bar=1 atmosphere.

Of course, the higher the compressive force of the air mass, and the compressor capacity will be higher. So this tool will be able to handle more complex tasks.

Please note that if the manufacturer have a working pressure of 10 bar, this value is not absolute. In operation, the pressure will range from 6 to 10 atmospheres. This should be considered when you buy equipment you plan to use for painting.

If the compressor is to be used regularly, for example, only for tire inflation, the slight pressure fluctuations will not play any role. For use in the garage will be enough devices with operating pressures up to 10 atmospheres. For professional tire and automotive workshops is better to take the device a pressure above 10 atmospheres.

Rated power

This is one of the most important and relevant parameters for any equipment. Knowing the power, it is possible to assess what the potential is a particular model. Obviously, the higher will be the power of the electric motor, the greater the pressure and capacity.

If the compressor is equipped with a low-power motor, the continuous operation, it can start to heat up. And it can have a negative impact on its operating qualities and duration of its operation.

Therefore, when choosing the compressor, so that it is guaranteed to work properly and for a long time, it is necessary to look at the models that have at least 30% headroom. This will reduce the load and significantly extend the operation of the equipment.

Performance

Performance-This indicator shows a value which determines the total amount of compressed air pumped by the compressor per unit of time, usually one minute. Generally, the manufacturer specifies the performance at the input corresponding to index at 20 °C.

Since the lowering of the temperature of the compressed air, the performance will also fall, then it must also be considered. After all, the equipment can not always be operated only in the summer. If you want to work all year round, in order to performance winter fell sharply, with the purchase of the instrument is necessary to choose the device with a margin. Best of all, if the performance will be 30-50% more than required for the values.

The volume of the receiver

The receiver-a container, which is supplied and where the stored compressed air during operation of the compressor. Its volume is always specified in liters. It may vary from 50 to 500 l.

receiver's presence is not required at all to swap tires. However, here, too, has its advantages-the greater the volume of the tank with the air, the less will have to run the engine. Consequently, less energy will be spent. It is convenient and advantageous for relatively small and short-term work-pumping, purging, and others. But devices with a large receiver are more expensive and require more powerful engine.

Buying a compressor with surround receiver may be relevant if the unit is going to be very actively used where required high capacity and large volumes of air. For example, when pumping heavy and the wheels on the overall technique to work with powerful pneumatic wrenches, etc.

Noise

This figure is also quite relevant, since the compressor is hard to call quiet equipment. As a rule, they are all at work to give a lot of noise, on average, this figure is at around 85 dB. And the more powerful the setting, the more noise it will generate.

To reduce noise, especially manufacturers use additional sound insulation materials, which often helps reduce the noise level to 68-70 dB. It is already noticeable, and especially with the compressor in the garage will be much more comfortable to work with. Therefore, this measure is also important to always pay attention.

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