24mm Plastic Lotion Pump for Bottles

How It Works: The Pumping Cycle

The operation is a simple yet clever two-stroke process:

1. The Downstroke (Dispensing):

• When you press the actuator down, it pushes the piston into the chamber.

• This increases pressure inside the chamber.

• The pressure forces the ball valve to seal the entrance from the dip tube.

• The only exit is through the actuator nozzle, so the product is forced out and dispensed.

2. The Upstroke (Priming):

• When you release the actuator, the spring pushes it back to its original position.

• This retracts the piston, creating a vacuum (low pressure) inside the chamber.

• This vacuum unseats the ball valve, opening the passage from the dip tube.

• The higher atmospheric pressure in the bottle pushes the product up the dip tube and into the now-empty chamber, ready for the next pump.

This cycle repeats with every press.