How the spray pump works:
When the handle is pressed by hand, the volume of the spring chamber decreases and the pressure increases. The liquid enters the nozzle chamber through the hole of the valve body, and the liquid is ejected through the nozzle. At this time, after the handle is released, the volume of the spring chamber increases, forming a negative pressure, the ball opens under the negative pressure, and the liquid in the bottle enters the spring chamber. At this point, there is already some liquid in the valve body. When the handle is pressed again, the liquid stored in the valve body is flushed upwards
From the above working principle, the key to a good spray pump is to pay special attention to the following aspects.
1. Glass beads or steel balls under the spring, the tightness here is very important, which is related to the upward force of the liquid in the spring cavity. If it leaks from here, a part of the liquid will leak into the bottle when the handle is pressed, thus affecting the spray effect of the liquid;
2. The sealing ring on the upper end of the valve body. If there is a leak here, the upward pull of the liquid as it leaves the handle will be reduced, and the amount of liquid stored in the valve body will be less, which will also affect the spray effect.
3. The engagement between the lever and the valve body. If the meshing here is loose, there is a leak, there will be some resistance as the liquid rises to the nozzle, causing the liquid to flow back. If it leaks from here, it will also affect the spray effect.
4. The design of the spray pump nozzle and the design of the nozzle are directly related to the spray effect. Please explain the nozzle design in detail on the next page; so the general spray pump function will also detect these four positions, and other appearance and matching problems will also be detected as usual;