Lotion pumps are used in facial cleansers, shampoo, shower gel, and other products with a certain viscosity, and the structure of the pump is mostly in the form of a plunger pump. According to the force of the piston and the degree of contamination of the liquid, it can be divided into two types: internal spring and external spring. Judging from the flow degree of the liquid flowing out, it can be divided into two types: booster pump and non-boost pump. The "2" series is a non-boost pump, and the "3" series is a booster pump. No matter what kind of lotion pump, the working principle is to use positive pressure and negative pressure.

How Lotion Pumps Work

Step 1 - The lotion pump functions like an air extraction device. It defies gravity and helps the contents of the tank reach the user's palm.

Step 2 - When the actuator is pressed, the piston moves, which in turn compresses the spring. It effectively allows the upwardly applied air pressure to pull the ball upwards along with the contents inside the diptube. The contents first fill the dip tube and then reach the lotion pump chamber.

Step 3 - Once the actuator is released, the spring is repositioned to its original position. The ball returns to its standby position and seals the canister, shutting off the flow of content so that it cannot return to the lotion pump bottle.

Step 4 - The three steps above are collectively referred to as startup. When the actuator is pressed again from its rest position, the container contents will first pass through the valve stem and then reach the actuator. Finally, the pump dispenses the liquid into the user's hand.