A framework for evaluating the topic
Planning note: Maximum pump flow alone is not a selection criterion; turndown, back pressure, material compatibility and control response are verified together.
Assess fertigation architecture from main-line flow, stock ratio, channel count, measurement feedback and chemical compatibility. This resource provides general technical information. Final capacity, equipment and implementation choices require engineering calculations based on site and project data.
Required injection flow follows from main-line flow and stock ratio; the pump should not operate at the extreme edge of its adjustment range.
A diaphragm pump meters against pressure, a peristaltic design confines fluid to tubing, and a venturi depends on available pressure differential.
Concentrated A and B stocks remain separate; acid channel, backflow prevention, mixing volume and EC/pH-cell delay enter the control logic.
Topics covered in technical assessment
Main irrigation flow range
Required injection flow follows from main-line flow and stock ratio; the pump should not operate at the extreme edge of its adjustment range.
Stock concentration and injection ratio
A diaphragm pump meters against pressure, a peristaltic design confines fluid to tubing, and a venturi depends on available pressure differential.
A/B/acid channel count
Concentrated A and B stocks remain separate; acid channel, backflow prevention, mixing volume and EC/pH-cell delay enter the control logic.
Diaphragm, peristaltic or venturi approach
Required injection flow follows from main-line flow and stock ratio; the pump should not operate at the extreme edge of its adjustment range.
Back pressure and pulsation
A diaphragm pump meters against pressure, a peristaltic design confines fluid to tubing, and a venturi depends on available pressure differential.
Wetted-material compatibility
Concentrated A and B stocks remain separate; acid channel, backflow prevention, mixing volume and EC/pH-cell delay enter the control logic.
EC/pH cell and mixing volume
Required injection flow follows from main-line flow and stock ratio; the pump should not operate at the extreme edge of its adjustment range.
Calibration, rinsing and safety interlocks
A diaphragm pump meters against pressure, a peristaltic design confines fluid to tubing, and a venturi depends on available pressure differential.
Planning and comparison logic
Assess fertigation architecture from main-line flow, stock ratio, channel count, measurement feedback and chemical compatibility.
| Input to verify | Effect on the decision | How to verify it |
|---|---|---|
| Main irrigation flow range | Required injection flow follows from main-line flow and stock ratio; the pump should not operate at the extreme edge of its adjustment range. | Diaphragm, peristaltic or venturi approach |
| Stock concentration and injection ratio | A diaphragm pump meters against pressure, a peristaltic design confines fluid to tubing, and a venturi depends on available pressure differential. | Back pressure and pulsation |
| A/B/acid channel count | Concentrated A and B stocks remain separate; acid channel, backflow prevention, mixing volume and EC/pH-cell delay enter the control logic. | Wetted-material compatibility |
Common mistakes
Wetted-material compatibility
A diaphragm pump meters against pressure, a peristaltic design confines fluid to tubing, and a venturi depends on available pressure differential.
EC/pH cell and mixing volume
Concentrated A and B stocks remain separate; acid channel, backflow prevention, mixing volume and EC/pH-cell delay enter the control logic.
Calibration, rinsing and safety interlocks
Required injection flow follows from main-line flow and stock ratio; the pump should not operate at the extreme edge of its adjustment range.
Why does this matter in your project?
Planning note: Maximum pump flow alone is not a selection criterion; turndown, back pressure, material compatibility and control response are verified together.
This resource provides general technical information. Final capacity, equipment and implementation choices require engineering calculations based on site and project data.
Explore the related systemTechnical references
Frequently Asked Questions: Fertigation Unit and Dosing Pump Selection
How should main irrigation flow range be assessed?
Required injection flow follows from main-line flow and stock ratio; the pump should not operate at the extreme edge of its adjustment range.
How should stock concentration and injection ratio be assessed?
A diaphragm pump meters against pressure, a peristaltic design confines fluid to tubing, and a venturi depends on available pressure differential.
How should a/b/acid channel count be assessed?
Concentrated A and B stocks remain separate; acid channel, backflow prevention, mixing volume and EC/pH-cell delay enter the control logic.
How should diaphragm, peristaltic or venturi approach be assessed?
Required injection flow follows from main-line flow and stock ratio; the pump should not operate at the extreme edge of its adjustment range.
How should back pressure and pulsation be assessed?
A diaphragm pump meters against pressure, a peristaltic design confines fluid to tubing, and a venturi depends on available pressure differential.