Desoldering pumps are devices designed to remove solder from printed circuit boards. There are conventional and pneumatic.
The principle of their operation is as follows: first, the desoldering pump is charged (the lever is pressed all the way), and then, by pressing the same button, the lever returns to its original position, creating low pressure, due to which the solder is drawn inward. In other words, the tin pump is a "reverse" syringe for tin.
It should be noted that for the most effective "suction" of the solder, it is necessary to melt the contact pad well, but there are desoldering pumps that themselves perform this function (soldering irons with a desoldering pump).
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