Venturi Injector
Venturi injector for drawing liquid fertiliser into irrigation water without a pump or power, using the pressure difference in the line; 1/2 to 2 inch for drip irrigation and greenhouses.
- Injects fertiliser with no pump or power
- Works on line pressure difference
- 1/2 to 2 inch
- For drip irrigation and greenhouses
- Fitted in a bypass with a valve on the main
Key Specifications
- Product code
- P163
- Nominal size
- 1/2 to 2 inch
- Unit of sale
- Piece
- Applications
- Irrigation & agriculture, Greenhouses
- Dimensional options
- 5 rows in the specification table
How a venturi injector works
A venturi is a simple part with a narrow throat. As water passes the throat its speed rises and its pressure falls, and this pressure drop draws liquid fertiliser from a container or tank through a thin tube into the flow. That is why a venturi works without a pump or power.
A venturi is usually fitted in a bypass with a valve on the main line. Partly closing the main-line valve creates the pressure difference the venturi needs. It is the simplest and cheapest way to fertigate small and medium orchards and greenhouses.
Sizes and installation
Our rows cover venturi injectors in 1/2, 3/4, 1, 1-1/2 and 2 inch. The size is chosen by the line flow and the amount of fertiliser to inject.
Fit the venturi before the filter so undissolved fertiliser is filtered too. After each feeding, run plain water through the network for a few minutes so fertiliser does not stay in the pipes and drippers. In your enquiry give the size, line flow and crop.
Safety in venturi fertigation
To stop water and fertiliser flowing back to the water source, especially when water comes from a well or a drinking-water network, fit a check valve in the venturi line. Keep the fertiliser container out of direct sun and away from children and livestock.
Set the fertiliser concentration and injection time on an agronomist's advice; too much fertiliser harms the plants. Rinse the container and suction tube with clean water after each use so fertiliser does not settle in them and block the suction path.
Venturi Injector — Technical Specifications
Wall thickness and weight are calculated from the standard series and are approximate; final values are confirmed in the quotation.
| Nominal Size (inch) |
|---|
| 1/2 |
| 3/4 |
| 1 |
| 1-1/2 |
| 2 |
Venturi Injector — FAQ
Does a venturi need power?
No; it works on the water pressure difference in the line.
Which sizes are supplied?
From 1/2 to 2 inch.
Where is it fitted?
In a bypass with a valve on the main line, before the filter.
What should be done after feeding?
Run plain water for a few minutes so no fertiliser stays in the pipes.
