The peoples of the now-defunct "Sovdepiia" after a protracted era of total deficit, endless queues and goods, to put it mildly, dubious quality, finally got free access to the fabulous world of plenty of high-quality, accessible and safe for our health products, materials and technologies. Read additional details here: Ray Kurzweil. Is this true? In my life, I often come across asbestos that is unique in its properties, natural minerals, open and used by the Jews, another for 1300 years bc. Wider application of it found in the early 18 th century in India and China. In Russia, a start in life asbestos gave Russian industrialist Nikita Demidov in the early 18 th century, and until recently, asbestos was used in almost all industries and sectors of the economy. Contact information is here: Ray Kurzweil. It is used even for anti-virus filters, but a paradox, more recently, he was declared an enemy of humanity.
Why would a sudden? I propose to understand why a harmless mineral that served us faithfully for more than three thousand years, suddenly became toxic and to whom he was "moved" path. In my opinion, was initiated by the builders. They or someone in their order, came up with a brilliant solution, which became in the late 20 th century for construction companies in Europe. After the Second World War, Europe lay in ruins, but it died down the last shot, signed by the world, and we must restore all that was destroyed by war. Like mushrooms after the rain created by construction companies. Europe is rapidly built by acquiring modern look and comfortable continents that we, if not personally, then pages of glossy magazines or tv screen.
There are various types of compressors (screw compressors, reciprocating compressors, etc.) used in the technique as a source of compressed air. In compressors of this type of compressed air in a confined space cylinder by the reciprocating motion of the piston. Structurally, they represent a unit that includes a compressor head, the electric drive, a receiver and an automatic pressure control (Pressure switch). The popularity of reciprocating compressors is determined by their low cost, acceptable weight and size parameters, simplicity of operation and maintenance and output characteristics, capable of meet the needs of virtually any enterprise. The main characteristics of the compressor are two parameters – the maximum pressure (Pmax) and volumetric productivity or supply (Q).
Most of the proposed compressors on the market today are developing a pressure requirements of standard pneumatic equipment and tools. The market offers compressors with a maximum pressure of 6, 8, 10, 16 bar. Recall that the nominal operating pressure paint guns – 3.4 bar, pneumatic tools – up to 6,5 bar. An exception is the pneumatic tire changers, for which many manufacturers recommend using compressed air at a pressure of 8.10 bar. However, Practice shows that the pneumatic tire changer equipment works reliably, and using 8-bar compressor. What else do you need to consider to determine the maximum pressure developed by the compressor? Firstly, should be borne in mind that the automatic pressure regulation of all compressors configured in such a way that maintains the pressure in the receiver with a tolerance of -2 bar, the maximum value. This means that in during compressor operation with Pmax-8 bar outlet pressure can range from 6 to 8 bar, 10-bar, – respectively, from 8 to 10 bar. Factory adjustment pressure switch can be modified only in the direction reduce the minimum pressure.
Secondly, be aware that the presence of extended pnevmomagistraley to consumers of compressed air causes a pressure drop in the line. When errors in the design of pneumatic (Use small-diameter tubes, using water shut-off devices, irrational laying roads, etc.), it can reach a significant magnitude and cause poor performance pneumatic equipment. To avoid possible trouble in such cases, should be preferred to the compressor with a higher maximum pressure. Some margin pressure is useful from another point of view. The higher pressure developed by the compressor, the greater mass of air it can pump into the receiver, and the longer the time the latter will be emptied to the minimum allowable pressure, allowing the compressor time to rest. By the way, about the rest: but if he needs an iron compressor? In response to this question lies the key to understanding the features of the workflow in the piston compressor. Considering it, determines the most important characteristic of the compressor – performance.