The tube with a very thin inner diameter is called "2507 Capillary tube in china". It usually refers to a thin tube with an inner diameter equal to or less than 1 mm. It is called 2507 Capillary tube in china because the diameter of the tube is as thin as a hair. It is used in medicine and building materials.

2507 Capillary tube in china is generally used in small freon refrigeration units below 20kW. 2507 Capillary tube in china is made of copper tube with a length of 1~6m and an inner diameter of 0.5~2mm. Through various combinations of length and diameter, it can meet the requirements of different working conditions and refrigerant installations with different cooling capacities, but 2507 After the Capillary tube in China is selected and installed, it cannot change with the load change. In order to make the refrigeration device operate with high efficiency in most of the time, it is extremely important to choose a representative design working condition.

The thinner 2507 Capillary tube in China is less affected by the air pressure on water absorption, so the thinner 2507 Capillary tube in China absorbs water more strongly when it is perpendicular to the water surface.