Technical Tips | How does an Lotion Pump Work

Jun. 08, 2022

Lotion Pump


A lotion pump, also called a pressed lotion pump, is a liquid dispenser that uses the principle of atmospheric balance to pump out the material in the bottle by pressing and replenishing the outside atmosphere into the bottle.


First press

When pressing the head for the first time, the piston head is compressed together with the spring by the connecting rod; in the process of compressing the spring, the outer wall of the piston opens the discharge hole of the piston head by rubbing against the inner chamber wall of the cylinder; when the piston slides downward, the air inside the cylinder is discharged through the already opened discharge hole of the piston head.


Pressing repeatedly

The air inside the cylinder is discharged by repeated presses.


Liquid suction

After the air is discharged from the cylinder by pressing the piston head by hand through the connecting rod, the piston head, and the piston, the spring is compressed together and the piston head is released, the spring moves backward (upward) due to the loss of pressure. At this time, the liquid storage cavity in the cylinder forms a vacuum to absorb the liquid state, the ball valve will be sucked upward, the liquid in the bottle will be sucked into the liquid storage cavity of the cylinder through the suction tube.


Liquid storage

The liquid is stored in the cylinder by repeatedly pressing the betting head and sucking the liquid several times until the liquid storage is full.



When the liquid in the cylinder storage chamber is full, the liquid is ejected directly from the nozzle of the nozzle through the discharge hole by pressing the nozzle again.


Performance parameters of lotion pump


Pumping Volume

The pump output is the first important parameter of the lotion pump. It is related to the sealing of the pump head, the tolerance of the parts and many other factors.


Number of Air Pressure First Spray

The number of air pressure first sprays is another important consumer experience parameter and an important quality standard in the production process.


Minimum lower pressure

Minimum down pressure is a factor of particular interest to the high-end market.


Leakage design

Leakage function design is the most important lotion pump parameter. Sealing, which seems to be only a parameter requirement, involves all interconnected parts of the lotion pump construction.


That's all we have to share today. We are a lotion pump supplier, please feel free to contact us if you need them!

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