SPRAYERS & SPRAYING
REGULATORS AND DOSING VALVES – IMPROVING ACCURACY AND EFFICIENCY
Accuracy and efficiency are important topics in modern spraying . With tougher regulations and increasing costs there has never been more pressure to ensure that every drop of fertiliser , herbicide or insecticide is delivered precisely .
Various flow regulators can be fitted to sprayers to improve the accuracy of spraying but what you might not have seen before is dosing valves . These devices can be used to increase the efficiency of the sprayer by either ensuring a more consistent droplet size and / or a more consistent flow rate . So , whilst they do not increase the utility of the sprayer per se they certainly do enhance its performance .
A pressure regulator will solve the problem of having to accurately recharge the pressure in the tank . As the pressure and flow rate will now be constant , calibration is easier . This still relies on the user only pressing the trigger for the same amount of time each and every time and so , whilst it ’ s a vast improvement on a measuring cup and a stopwatch , is still not ideal . the fluid is delivered and when the trigger is released the valve will reset , allowing for the next dose to be sprayed . Dosing valves can be calibrated to deliver between 2 and 25 ml with each spray by simply changing the size of the dosing chamber via a simple screw .
CONCLUSIONS
With this array of accessories , a knapsack sprayer becomes a highly versatile spraying system suitable
Flowrate regulator
for a wide variety of spraying jobs , improving accuracy and reducing costly wastage of expensive chemicals while also reducing physical strain . We hope the above discussion of the available sprayer add-ons might make you think again about the pride of place you give this often-overlooked piece of kit .
For more information , contact : www . prosprayers . co . uk
Dosing valves work differently to pressure regulators . Rather than keeping pressure constant they have a fill chamber that will stop spraying after a set amount of fluid is delivered . Spraying will cease automatically when
Dosimeter Valve and application pipe
24 GroundskeepingJournal . co . uk | Winter 2021