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Application and Principle of Stainless Steel Capillary Tube

Every tube with a very thin inner diameter is called a capillary. Usually refers to a thin tube with an inner diameter equal to or less than 1 mm, which is called capillary tube because it is as thin as hair. At present, it can be seen in medicine and building materials.


Introduction to the principle of capillary tubes

When an object with a fine pore is in contact with a liquid, the liquid rises, permeates or decreases along the pore. Capillary phenomena occur when the adhesion force between liquid and solid (pipe wall) is greater than the cohesion force of liquid itself. The concave or convex surface of liquid in vertical thin tube and the absorption of liquid by porous material are all caused by this phenomenon. The appearance of capillary action is due to the viscous nature of water molecules adhering to other objects.

Application of stainless steel capillary tubes

Stainless steel capillary tubes are generally used in small freon refrigeration units under 10 kW. The capillary is made of copper tube with a length of 1-6 m and an inner diameter of 0.5-2 mm. Through various combinations of length and diameter, it can meet the requirements of refrigerant devices with different working conditions and refrigeration capacity. But after the capillary is selected and installed, it can not change with the load. In order to make the refrigeration unit operate efficiently in most of the time, it is important to select representative design conditions.

SS capillary tubes are widely used in chemical industry, petroleum, papermaking, energy, sewage, medicine, aerospace, decoration, bridge, textile printing and dyeing, mechanical hardware, decoration, shipbuilding, engineering and other industries of gas, liquid, dry powder and other media transportation.

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