1. Lotion pump
It is also called a push-type lotion pump. It is a liquid dispenser that uses the principle of atmospheric balance to pump out the material and liquid in the bottle by pressing and fill the bottle with the outside atmosphere. The main performance indicators of the lotion pump: air pressure times, pump output, down pressure, head opening torque, rebound speed, water intake indicators, etc.
Distributors are divided into two types: tie-type and screw-type. In terms of function, they are divided into spray, foundation cream, lotion pump, aerosol valve, and airless bottle.
Special dispensers such as foam pump heads and hand-button sprinklers. The foam pump head is a non-gas-filled hand-pressure pump head, which does not need to be filled to produce foam, and can produce quantitative high-quality foam with light pressure. Usually comes with a dedicated bottle. Hand-button sprinklers are usually used in products such as detergents.
The composition of the dispenser is more complicated, generally including: dust cover, snap head, snap rod, gasket, piston, spring, valve, bottle cap, pump body, straw, valve ball (with steel ball, glass ball). Bottle caps and dust-proof caps can be colored, electroplated, and can be covered with anodized aluminum rings.

2. The working principle of the pump head:
Manually press the pressure handle downwards, the volume in the spring cavity decreases, and the pressure rises. The liquid enters the nozzle cavity through the hole of the valve core, and then sprays the liquid out through the nozzle. At this time, loosen the pressure handle and the pressure in the spring cavity The volume increases and negative pressure is formed. The sphere opens under the action of negative pressure, and the liquid in the bottle enters the spring cavity. At this time, there is already a certain amount of liquid in the valve body. When the handle is pressed again, the liquid stored in the valve body will be Punch upwards, spray out through the nozzle;
From the above working principle, the key to a good pump head is to pay special attention to the following places:
1. The glass ball or steel ball under the spring. The seal here is very important. It is related to the strength of the liquid in the spring cavity. If there is leakage, part of the liquid will leak into the bottle when the pressure handle is pressed. And affect the effect of liquid spray;
2. It is the sealing ring at the upper end of the valve body. If there is leakage, the upward force of the liquid will be reduced when the pressure handle is released, resulting in a small amount of liquid stored in the valve body, which will also affect the spray effect;
3. The fit between the pressure handle and the valve core. If the fit here is loose and there is leakage, there will be a certain resistance when the liquid rushes up to the nozzle, and the liquid will flow back. If it leaks here, it will also affect the spray effect.