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Compressor Glossaries
Compressor glossaries
Screw air compressor
Screw air compressor is a machine which is designed according to the operational principle that twin-screw rotation cause changes of air cubic content.

Pressure of Air Compressor
The introductions of the pressure unit which is often used in screw air compressor

  • Operating pressure, commonly known as exhaust pressure which is the maximum pressure of exhaust air form air compressor.
  • Usual pressure unit : bar»òMpa £¬1 bar = 0.1 Mpa £»
  • User often call pressure unit ¡°KG¡±1 bar = 1 Kg

Air flow

  • Air flow is the volume of the exhaust air conversion inlet air condition per unit time and requested exhaust pressure.
  • Flow unit: m3/min»ò L/ min£¬1m3= 1000L
  • Usual flow unit: ?m3/min

Power of air compressor

Power of air compressor is power ofactuating motor or diesel engine of which is matched to air compressor.
Power unit: KW OR HP£¬1KW ¡Ö 1.333HP

 
¡¡¡¡How to choose sizes of air compressor

Pressure selection
Purchasing the air compressor ,first ,strictly determined pressure of compressorwhich is working pressure add 1-2ppm assurance which is according to the loss of pressure from sit of installation to site of use compressed air, the diameter of quantity of the corner. For example: the bigger the diameter, the less of pressure loss; the smaller the diameter, the more of pressure loss.
So, when the distance from the compressor to the site of themachine which use compressed air is too long, we must use the big diameter pipeline. We¡¯d better install the compressor near the site of the machine which use compressed air.

Flow selection

  • The flow of compressor is consume compressed air of all equipment which use compressed air multiply one point two.
  • The flow of new project is according to the numerical value which is provided by the designing institute.
  • Knowing the flow from the supplier.
  • The compressor station is according to the original numerical value and actual conditions.
Suitable compressor is good to the user and the equipment. To big compressor waste energy ;to small is bad to equipment which is at the state of matical-load, low pressure, few compressed air in a long time.

The relations of power, pressure and flow
When the power is fixed and the speed of rotation is changed, the flow and the pressure is altered accordingly. For example£ºA compressor which power is 22kw ,when the pressure is 7bar,the flow is 3.8m/min and when 8bar, the flow is 3.6m/min according to the rotary speed of the compressor motor technology curve. So, the lower speed of rotation, the less flow and so on.
Choosing the power of compressor on the condition that the work pressure and the flow. The power is matched to drive electrical machine.
So, the process of choosing compressor is pressure determination, then the flow, the powder at last.

Introduction: If you would known details of the content, Please give telephone to Business Department of Shanghai Success Engine Compressor CO,.LTD.021-51098080 56559911

 
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