There are many ways to integrate fertilizer substances or products into the irrigation water to protect the crop. We recently told you about fertilizer pumps, in which we explained that you could introduce fertilizers and other products and that there were different types of them. Today we want to introduce you to the Venturi injector system that offers different advantages, all very interesting, which should be known in depth.

What is a Venturi injector?

This system works over a wide range of pressures and only requires a minimum pressure differential between the inlet and outlet ends to initiate emptying at the suction port.

This, together with its high efficiency and the affordable price at which it can be purchased, makes this system highly recommended for urban gardens and other types of crops. It should also be noted that this system does not require any electrical connection, which is a great advantage. On the other hand, it is quite safe because it works with the vacuum that the pressures create inside.

How does the Venturi injector work?

The operation of Venturi, although simple, is quite particular. This device is made up of two funnels that are joined at their narrowest part. The water, when passing through what we can identify as the throat, increases its speed causing a negative pressure that is used to inject the desired solution.

Explained in a more detailed way, what happens in the Venturi system is that a contraction of the system inlet is caused by the passage of pressurized water that causes a high speed jet to form. This increase in speed through the injection chamber generates a decrease in absolute pressure creating a vacuum and causing the substance to be drawn towards the suction port where it mixes with the water.

What is important to keep in mind is that Venturi works by sucking or aspirating the solution, be it a nutrient, a fertilizer, a pest or disease control product; so that it mixes with the water in the pipe. It could not work if it were not through this change in pressures, although it must be remembered that it is the vacuum that finally achieves the expected effect.

How to use venturi?

The injector starts working when the auxiliary valve that has been installed in the suction hose opens. To achieve that the suction effect is generated, we must partially close the valve that regulates the pressure of the main line until the device's own flow has been generated. If we tried to close the valve after this point, the pressure in the irrigation system would decrease. If what we want is for the system to end, it is only necessary to fully open the pressure regulating valve and close the auxiliary valve.

You can see our injectors here

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