THE 18999 VERSATILE SEAL - Used with the Quick TeeJet system.

THE 18999 VERSATILE SEAL - Used with the Quick TeeJet system.

From the pictures you can see how this seal fits over the small filters and nozzle-tip cores.    Pay special attention to the design. The one shoulder is square and the other is rounded. The rounded shoulder faces the outlet.

The seal is used with the Quick TeeJet system.

In the real world, the chances of losing a filter in-field are pretty good when using the standard gasket - 19438. If the 18999 seal is used with the filter it cannot be lost. Why? Because the Quickjet cap must have a gasket or seal for a water-tight fit.

Here's a pic of a split-eyelet body, 100 mesh filter with 18999 seal,air induction Twinjet tip and cap.

chemicon@multispray.com

Tel Intl : +27 83 289 0327

Tel Natl : 083 289 0327

  

TRIGGERJET 50800 - Standard or modified the choice is yours

TRIGGERJET 50800 - A more versatile modified lance.

Virtually everywhere you look retail outlets are nothing but Chinese trading posts. Complete knapsacks are being offered at prices as low as $18. (about R200) Quality leaves much to be desired but there is little doubt that they sell in there thousands. Fortunately, there are serious clients who have learned their lesson and still buy quality.

This picture shows you the type of lance nozzle arrangement supplied from the east. The thread size is metric which is the way the world is heading. The problem is that it can't be adapted and no nozzle-tips fit the caps.

Here's a picture of the 50800 Triggerjet lance manufactured in China. If the specs are adhered to the product is still good. It is not the aim of this blog to get involved with the failed financial system.

The adjustable Conejet supplied with the Triggerjet is suitable for the domestic market and specifically for use with insecticides, fungicides and foliar feeds. For example an orchid grower with a few hundred plants wants a fine spray for foliar feeding. Perfect.

For the majority of our clients we modify the lance nozzle assembly to make it more versatile.

Spares? We keep a supply of the inlet hose-shank to fit a 9.5 mm ID or 3/8th hose. Note the filter fitted in the trigger handle.

What happens when the the trigger leaks? Can it be repaired?

YES!  This need not be  a "gooi weg koop nuwe!"   

chemicon@multispray.com

Tel Intl: +27 83 289 0327

Tel Natl: 083 289 0327

ESSENTIAL CONCEPTS - A simple test.

Essential  Quantitative Concepts -  A simple test

1       A rectangle with sides 50 metres by 30 metres 

           A What is the area in square metres? ……m²

           B What is the perimeter length in metres?……m

2       How many millilitres in a half litre?   ..….ml 

3       How many sides has a cube got?     …………. 

4         Convert 900 millilitres to litres.         ………….litres

5       How many millilitres of imazapyr do you have to add to a 16 litre knapsack to                   make up a five percent (5 %)mix? ………….ml

6       You pour 300 ml of Roundup into a 20 litre knapsack. What is the concentration                   expressed as a percentage? ………….% 

7       Walking at a speed of 1 metre per second, how fast are you walking in kilometres per                          hour?                 ………….km/hr

8       Roundup can be applied at 3 litres per hectare. How much Roundup is applied per m² ?                                                 …………..ml/m²

9         picloram 240 g/litre  herbicide is used in a 1: 1 (Ratio of one to one) mix with                              water.        Express this rate as a percentage. …………..%

10     A spray-operator covers a distance of 30 m in 36 seconds. What is the speed in                                  km/hr?         .......…..  km/hr

11     A spray-tip operates at 250 kPa (Kilopascals). Convert this pressure to bar.                                                                ...……..  bar

12       A spray-tip delivers 0.9 litres/min.

                A What is the flow rate in ml per second? ……….ml/ sec

               B How long would it take to empty a 16 litre knapsack? Only one is correct!!

                                    15.0 minutes ……………

17.8 minutes ……………

16.7 minutes ……………

13       A supervisor counts the number of knapsacks sprayed by each operator per                         day and records the            following information:

                        Operator Knapsacks sprayed per day

                        No 1       9

                        No 2       7

                        No 3       10

                        No 4       6

                        No 5       7

                        No 6       9

                        No 7       7

                        No 8       10

                        No 9       7

               The contractor wants to know the average number of knapsacks sprayed per                          operator per day?            ....………….     Average knapsacks / day 

14           A contractor wants to do a costing on a cut-stump treatment for planning                                 purposes. He wants to               know   how much herbicide mix he will use                         on average per stump. He cuts and treats 50 gum                    stumps and                              finds out that he used four litres. 

              What is the average amount of mix per stump?  …………..ml/stump 

15        The herbicide imazapyr used for the gum cut-stump treatment costs $40/litre and is used as a 5%  mix with water. Using the information from question 14, how much imazapyr would be used per 1’000 trees and what would it cost ?

A Amount of imazapyr / 1’000 stumps     ....…………..litres 

B Total imazapyr cost / 1’000 stumps       ……………..$'s 

16        An operator uses 1 litre of spray-mix on 50 m².  What is the spray volume in l /                                                              ha?            Answer …………….litres / ha

Questions?  chemicon@multispray.com

Tel Intl: +27 83 289 0327

Tel Natl: 083 289 0327

TREATED HECTARES VS FIELD HECTARES - Determining the nozzle-tip flow rate.

TREATED HECTARES VS FIELD HECTARES - Determining the nozzle-tip flow rate.

From the previous post about treated hectares we determined the amount of spray-mix per square metre and we established the speed at which the operation was being undertaken. To reiterate: For every field hectare the actual usage - ha_f = 12ml x 1500 m² = 18'000 ml or 18 litres.

SPEED. The operator walking at 3 km/hr or 50 m/minute (m/min =3000m/60min = 50m/min) covers 10 m² / minute.

The usage of spray-mix is therefore 12ml x 10m² = 120ml/minute.

To obtain thorough coverage of the Tobacco seedling crown you need a nozzle-tip delivering 0.12 litres per minute producing a solid cone pattern. Does it exist? Take a look in TeeJet catalogue 51-M and see if you can find a nozzle - tip matching the specification.

What about pressure? Can you find a knapsack that maintains constant pressure?

Is it possible to find a reliable pressure regulating valve that can be fitted in-line to ensure a constant pressure at the nozzle?

Is it practicable to treat each individual tobacco seedling?

This picture I took many years ago in Malawi. Immaculately maintained. Want to know why?

Contact CHEMICON if you need help.

chemicon@multispray.com

Tel Intl: +27 83 289 0327

Tel Natl: 083 289 0327

TREATED HECTARES AND FIELD HECTARES. SPRAY VOLUMES AND APPLICATION RATES.

TREATED HECTARES AND FIELD HECTARES. SPRAY VOLUMES AND APPLICATION RATES.

Treated Hectare = ha_t Field Hectare = ha_f    Make sure you understand the difference.

A treated hectare is 10'000 m² i.e. all 10'000 m² of a field are treated.   Although a crop occupies a field hectare in many cases only a portion of each field hectare is actually treated. I'm merely using tobacco as a row crop example.    It could be minimum tillage in maize, corn, "mielies", sugarcane, peas, beans, cotton, casava, or even gum or pine trees.

A PRACTICAL EXAMPLE - TOBACCO - TREATING FOR BOLLWORM

You need to know the following.   Ridge spacing 1.3 metres. Walking speed if using a knapsack = 3 km per hour. (3'000 metres per hour or 50 m per minute). Insecticide application in 120 litres per treated hectare - ha_t The insecticide is sprayed in a narrow band over the row to ensure coverage of the tobacco seedling crown. That's where the moth lays the eggs. The spray width will be 20cm or 0.2 metres.

How many ridges for every field hectare? One side of a hectare is 100 metres wide and there's a ridge every 1.3 m = 100 divided by 1.3 m. = 76 ridges. There's a bit of variation here between farmers so let just say 75 ridges. For each field hectare there'll be 75 ridges each 100 metres long.

Total length for each field hectare 75 ridges x 100 m = 7'500 metres. And spraying 0.2 m wide over each ridge then the total area treated for each field hectare is 7'500 metres x 0.2 m = 1'500 m² (Fifteen hundred square metres)

No formulas please. Taking a look at the spray- volume: it is specified in litres of spray-mix per treated hectare not the actual area to be treated for each field hectare. So the 120 litres has to be sprayed over 10'000 m² .

HOW MUCH SPRAY-VOLUME GOES DOWN ON EACH SQUARE METRE? READ THAT AGAIN. 120 litres per 10'000 m² or as pointed out elsewhere on this blog, per = for each. 120 / 10'000 = 0.012 litres/m²

I can just hear the moans and groans when some of you have to shift that decimal place. Repeat the calculation by converting the 120 litres into millilitres - 120'000 ml / 10000 m² = 12ml per square metre. 1'500 m² is being treated for every field hectare so the actual usage per field hectare - ha_f = 12ml x 1500 m² = 18'000 ml or 18 litres for each field hectare.

There is another way of looking at the situation but that's for the next posting.

Does this help in deciding which nozzle-tip to use? Not really because you need to know the flow rate in litres per minute.

chemicon@multispray.com

Tel Intl: +27 83 289 0327

Tel Natl: 083 289 0327