Proportional Injectors
Pure Hydroponics supplies the range of Mix Rite Proportional Injectors made by Tefen in Israel.
Proportional injectors are used to dose soluble fertilser, acids or agrichemicals directly inline into a passing flow of water with a high level of accuracy.
These additives are injected at a set proportion of the passing flow. If water flow increases, then the rate of injection automatically adjusts to maintain a set percentage.
As water flows through the injector, an internal water driven piston moves up and down to create the suction action which draws the additives into the injection unit.
No electricity is required.
Additives are constantly added as water flows through the unit with minimal pressure loss to the passing flow.
The proportional injectors can be installed inline, on a bypass manifold, or on multiple bypass manifolds parallel to the main line.
Proportional injectors are a cheaper, non electric alternative for growers who do not wish to use automated dosing controllers for dosing Nutrients A, B and pH on a drip fertigation system. Three injectors are purchased instead: one for Nutrient A, one for B and one for pH correction.
EC and pH monitoring of the nutrient solution is conducted downline with a handheld meter (Bluelab Combo Meter) or monitor (Bluelab Guardian). This can be via an inline sampling point (EC and pH probes mounted in an inline tee) or at the delivery point (e.g a sample taken from the drippers and then tested).
The injection percentages are then adjusted to ensure the correct EC and pH is maintained as the solution is pumped to the crop. The injection ratios are easily adjusted by turning a handle on the base of the proportional injector. Once the correct downstream EC and pH is reached no further adjustments are required on the injector provided that the strength of the stock solutions and consistency of the water source remains constant over time.
There is a wide range of injector sizes available. The most popular sizes are as follows:
Tefen 2502
Rate of Additive Injection into passing flow: 0.3 – 2%
Flow rate able to be passed through injector: 20 – 2500 litres per hour
Water Pressure: 0.2 – 8 Bar
Tefen 2504
Rate of Additive Injection into passing flow: 0.4 – 4%
Flow rate able to be passed through injector: 30 – 2500 litres per hour
Water Pressure: 0.2 – 8 Bar
Tefen 2506
Rate of Additive Injection into passing flow: 6%
Flow rate able to be passed through injector: 40 – 2500 litres per hour
Water Pressure: 0.2 – 8 Bar
Tefen TF-10-001
Rate of Additive Injection into passing flow: 0.1 – 1%
Flow rate able to be passed through injector: 500 – 10,000 litres per hour
Water Pressure: 1 – 8 Bar
Please talk to Pure Hydroponics for further information & pricing.
