Step 1
Clean water baseline
1.05 GPH
Cv 0.02 across 20 emitters
Center for Irrigation Technology (CIT)
Pruebas independientes de resistencia al taponamiento
Videos de la prueba Double Grit que muestran Max-Emitter operando bajo alta carga de contaminantes.
- 0 / 20
- Emitters plugged after final flush
- 5,500 PPM
- Peak grit concentration during test
- 11 sizes
- Grit mesh sizes (140 → 30 mesh)
- 2 ×
- Standard CIT grit loading
Test protocol
A doubled CIT grit test, end to end
The standard CIT emitter grit test was modified to double the total grit load and broaden the size distribution — a deliberately punishing protocol that plugs most off-the-shelf emitters during the first cycle.
- 01
Sample preparation
20 inline 1 GPH Max-Emitters installed in a circulating loop with controlled pressure and temperature, baselined on clean water before grit was introduced.
- 02
Eleven graded grit additions
Aluminum oxide grit (mesh sizes 240, 220, 180, 150, 120, 100, 80, 70, 60, 54, 46) added in sequence, each step adding 250 PPM and a flow measurement after every dose.
- 03
Peak load reading
After all eleven grit additions, the loop carried 5,500 PPM of suspended solids — twice the contaminant load of the standard CIT emitter test.
- 04
Flush & post-test reading
Grit was filtered out of the loop and a final flow measurement was taken on clean water to confirm whether emitters that had plugged could self-clear.
Test results
16 mm 1 GPH Max-Emitter scorecard
Twenty inline emitters, three flow checkpoints. Cv (coefficient of variation) is a measure of how uniform the flow is across all emitters — lower is better.
Step 2
At 5,500 PPM grit
1.04 GPH
1 of 20 plugged · Cv 0.02
Step 3
After clean-water flush
1.04 GPH
0 of 20 plugged · Cv 0.02
In the loop
Videos de la prueba Double Grit
Los 10 clips de prueba heredados convertidos a formato MP4 listo para la web.
Clip 01
Emisores Ore-Max instalados y operando con carga de arena
Clip 02
Canal de recolección después de que la solución de prueba pasó por los emisores
Clip 03
Agregando más arena a la solución de prueba
Clip 04
Agregando más arena a la solución de prueba
Clip 05
Agregando más arena a la solución de prueba
Clip 06
Canal de recolección mostrando acumulación de arena en los bordes desde los emisores
Clip 07
Solución de prueba goteando desde los emisores
Clip 08
Solución de prueba goteando desde los emisores
Clip 09
Solución de prueba capturada en un recipiente transparente
Clip 10
Canal de recolección con carga de arena
Study details
About this test
The results above come from the original CIT Double Grit Test report on the 16 mm 1 GPH Max-Emitter. Citation details are reproduced verbatim from the report's cover sheet and footnotes.
- Conducted by
- Center for Irrigation Technology (CIT), California State University, Fresno
- Report file
- 1213(AQS/07), Test #1B
- Test dates
- March 1 – 7, 2007
- Test sample
- 20 inline 16 mm 1 GPH Max-Emitters
- Operating pressure
- 15 psi
- Flow velocity
- 3 ft / sec
- Grit dosing
- 250 ppm per addition · 11 graded aluminum-oxide additions to 5,500 ppm total
- Grit material
- Aluminum Oxide grit, Fusco Abrasive Systems, Inc. (Compton, CA), ANSI B 74.12-1992
- Samples provided by
- Ore-Max, Inc.
- Technicians
- Vic & Andrew (Supervisor: Ed Norum)
Protocol: Standard CIT emitter plugging protocol, modified to double the total grit loading. “Plugged” is defined as flow less than 1.0 ml / minute. CV in this report is used for statistical clarification and is not intended to represent the coefficient of manufacturing variability. Copies of the test protocol are available on request from the Center for Irrigation Technology, California State University, Fresno.
Keep reading
Why the numbers look this way
The protocol shows the result; these pages show the design choices that produce it.
Max-Emitter Technology
The patented turbulent flow path and oversized screen area that drive these clog-resistance numbers.
Technical Data & Flow Curves
Pressure-compensation curves, flow rates, and engineering tables for every Max-Emitter line.
Emitter Comparison
Flow path length, screen area, and flow path volume vs. NetaFim, Toro, and Plastro emitters.
Pilot the Max-Emitter
Test it on your own solution chemistry
Request a sample roll of Max-Emitterline and run it against the contamination, pH, and temperature profile of your actual heap.