Foaming hand sanitizer from Press type foam pump. The "stock solution" is obviously pre-diluted. The key to foaming is obviously in the dismantling of this structure, which is different from the ordinary one. It is observed during the dismantling process of the installation sequence. The principle and process of the foaming of the Press type foam pump are roughly as follows:

The piston of the liquid pump is slidingly matched with the cylinder wall - the liquid is closed but the air is not closed, and the piston of the air pump is in an interference fit with the cylinder wall - the air is reliably closed.
The piston of the press type foam pump is assembled with the piston of the liquid pump. When the nozzle is pressed, the liquid and gas are simultaneously compressed and the pressure is increased, and the pressurized liquid enters the center hole of the piston sleeve and ascends. At the same time, the pressurized gas enters the casing from the gap between the liquid cylinder and the piston, and bubbles the liquid once and moves upward. There is a one-way valve on the top of the piston casing (open when you press to take the liquid. When you release it, close the upper end of the liquid cylinder, and use the negative pressure of the liquid cylinder during reset to open the bottom liquid valve, and replenish the liquid from the liquid bottle for use.), one soaking liquid After flowing out of the casing, it goes to the filter screen in front for secondary foaming. When the secondary foaming liquid passes through the filter screen, it is uniformly and finely foamed again and then enters the nozzle tube. Finally, the foamed hand sanitizer is spit out from the nozzle to complete the foaming of the hand sanitizer. , the liquid extraction process.
The position and details of the filter screen After taking the liquid, release the pressure. During the spring reset process, the negative pressure in the cylinder will replenish the gas from the one-way valve membrane for use. The conical one-way valve on the upper part of the press type foam pump piston casing functions Without further ado, the details of the liquid valve. After taking the liquid, the liquid cylinder is under negative pressure during the spring reset process, the liquid in the bottle opens the glass valve ball, and the hand sanitizer flows into the liquid cylinder for replenishment.