The Four Major Types of Air Filters

Posted by admin on Feb 29th, 2008
2008
Feb 29

Hygienic air is essential to human life, and in this modern age, that requires air cleaners. There are a few different methods of air cleaning, like Filtration, Electro-static Precipitation and Ion Generation. Air Filtration cleans air through the removal of sub-micron particulate, gases and odors. If you are plagued by allergies or asthma, an air filter might help you. Air filters are the best tools for eradicating allergens from the house. Particularly for those people who are suffering from asthma and allergies, both the U.S. Environmental Protection Agency (EPA) and the American Lung Association recommend air filtration.

The ability to remove allergens and contaminants depends on the amount of air drawn through the filter. Factors that affect filter efficiency include fiber size, fiber density, airflow rate, and particle diameter. Air filters may be centralized, in-home filtration systems or portable devices. When the air quality problems exist throughout the house, then a centralized filtration system is needed. Otherwise, portable cleaner may serve the purpose of air filtration.

There are four major types of air filters, depending on specific needs. They are:

Mechanical Filters

These filters force air through a special screen that traps pollen, dust particulate, smoke and air-borne irritants and pet dander. The best example of this type of filters is HEPA (High Efficiency Particulate Air) filter.

Gas Phase Filters

These air filters are used for removing odors and other types of pollutants such as gases from cooking, paints, perfume etc. These filters are not meant for the removal of allergens in the home.

Electronic Filters

In these types of filters, allergens are trapped through electrostatic precipitators with a fan. Electronic filters use electric charges to attract contaminants.

Hybrid Filters

These air filters combine electrostatic and mechanical filters. These are used to trap allergens rather than gas based contaminants.

Another type of air filters is the Ozone air filter, but it is not environment-friendly.

When purchasing an air filter, one has to consider things like which type of allergens will be removed, the filter’s efficiency with respect to HEPA standards, the clean air delivery rate (CADR) of the filter, the ease of changing the filter, and the noise that it will make. Changing air filters regularly facilitates is ability to improve the quality of air.

Air Filters Info provides detailed information on home, car, electronic, and HEPA air filters, as well as air conditioner filters and air filter manufacturers. Air Filters Info is the sister site of Air Purifiers Web.

An Introduction To Compressors

Posted by admin on Feb 28th, 2008
2008
Feb 28

Compressors are machines that compress air or gas. Compression is achieved through the reduction of the volume that the gas (or air) occupies. As a side effect of the minimization of volume, the temperature of air or gas increases.

The higher the compression ratio, the higher the temperature tends to rise. However, compressor manufacturers do take this into consideration. The problem is resolved by compressing on a per-stage basis and simultaneously cooling the gas.

There are many compressor types. Different compressor types achieve different compression ratios. Moreover, the horsepower that different compressors can achieve varies from 1 to 2 HP (Horsepower), up to a few thousand HP. Some compressors require oil in order to operate while others do not.

The most important compressor designs are listed below.

Reciprocating compressors are equipped with a crankshaft, which drives the pistons. They are commonly found in versions that produce 5 to 30 HP. However, larger ones used for industrial purposes can produce up to 1,000 HP.

Centrifugal compressors are used for heavy industrial purposes. Centrifugal compressors produce from ~100 HP up to a few thousand HP. They are usually stationary, and one of their applications is small gas turbine engines.

Rotary screw compressors are compressors aimed at commercial use. Their horsepower varies from 5 to 500 HP, and they are usually employed as superchargers in automobile engines.

Diagonal/Mixed-flow compressors are similar to centrifugal compressors except for some technical characteristics.

Axial-flow compressors are mostly used in large gas-turbine engines.

Scroll compressors are not as efficient as rotary screw compressors. They can be found as superchargers in automotives.

Along with the uses listed above, compressors are used in fields such as jet engines, refrigeration, medicine manufacturing, SCUBA diving, turbochargers, submarines, and air conditioning.

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

An Introduction to Air Compressors

Posted by admin on Feb 27th, 2008
2008
Feb 27

Air compressors are widely used among American manufacturers, industries and are often valuable components in automotive functions. Air compressors are typically available as both gas and electrically powered devices. It usually costs quite a bit to operate the compressors effectively, and this can form a large part of a business’s utility budget.

Air compressors are often the single most important source of energy; they are also one of the largest expenses, both in terms of purchase and maintenance costs. They are usually available in a horsepower of three-quarters or larger and can have air tanks with up to an 80-gallon tank. Makes, model and features of an air compressor will vary among brands and models.

The governing body over equipment such as air compressors is the American Society of Mechanical Engineers (ASME). An important safety component in all ASME certified air compressors is an air safety release valve. This valve allows air to escape if the tank pressure exceeds the maximum level as required by law. This prohibits accidents caused by excess pressure and the explosion of the compressor. Other safety measures include a cord that can be pulled to make sure the pressure is allowable and that the valves are not clogged or corrupted.

You should always choose an air compressor based on quality and protection; cost is important but should be a secondary factor for choosing an air compressor for your needs. The only way to guarantee your safety and the quality of workmanship is to purchase an air compressor that is certified by the American Society of Mechanical Engineers (ASME). These air compressors have undergone quality testing and will have a label attached to the unit. Not all air compressors will be ASME certified, although some states do not allow the sale of any compressor that has not been tested and certified by ASME.

Air Compressors Info provides detailed information about portable, industrial, engine-driven, 12 volt, and used air compressors, as well as air compressor parts, manufacturers, and more. Air Compressors Info is affiliated with Original Content.

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