What is the difference between an external pump head and a built-in pump head?- Yuyao Jinshun Sprayer Factory

External pump head: For nozzles and Fine Mist Sprayer, everyone should know that it is necessary to install a spring in the product center. The external pump head (ie, the spring in the center of the nozzle/pump head) is visible on the outside, usually above the pump head core, and this component is directly connected to the nozzle/pump head cover. The advantage of the external pump head is that it will not directly touch the liquid in the bottle, which is relatively hygienic. The external pump head can also avoid the rust of a single spring, which affects the quality of the product in the bottle. In addition, the power of the external pump head is greater than the power of the built-in pump head. Therefore, the use rate of external pump heads is usually higher, and the pump heads are suitable for more viscous liquids, such as emulsion liquids.

Built-in pump head: Contrary to the external pump head, the built-in pump head (ie, the spring located in the center of the spray head/pump head) is built-in and generally not visible. It is usually located in the center of the pump head body. The internal tension spring can directly touch the liquid. The pressure channel is slightly smaller than the external channel and is usually more suitable for essential oils, perfumes and skin creams.