Nozzle lock keys
The number of nozzle lock keys provided in the design of the sprinkler.
This
function is found only in oscillating models (see "Type") — it allows you to block some nozzles, reducing the width of the captured space or the intensity of watering (depending on which nozzles are disabled). In this case, each key is responsible for one nozzle — accordingly, the total number of keys corresponds to the maximum number of nozzles that can be blocked. Usually this number is 6 – 8, but there are exceptions; at the same time, the total number of nozzles in sprinklers with lock keys most often ranges from 18 to 26. Accordingly, the more lock keys relative to the total number of nozzles, the wider the possibilities for adjusting the sprinkler.
Minimum coverage area
The smallest area that a sprinkler can cover in normal operation, in other words, the area captured at a minimum range.
The minimum area is indicated only for models in which the size of the watered area can be adjusted (for example, by changing the angle). The smaller it is (at the same maximum), the wider the adjustment range. It also measures the suitability of a sprinkler for an area that is significantly smaller than the maximum irrigation area (see below). At the same time, when choosing, do not forget that models with the same area may differ in the shape of the space covered, the irrigation angle, etc.
Pressure
The pressure of the water in the connected hose/pipe that the sprinkler is designed to handle: lower pressure will not give the device the required performance, higher pressure may cause damage. And even if too high pressure did not lead to an "accident" immediately, it can happen at any time. Therefore, this parameter should never be ignored.
The best option is considered to be the situation when the pressure in the hose is slightly (by 0.4 — 0.5 bar) does not reach the claimed maximum — this allows you to fully realize all the capabilities of the sprinkler and at the same time gives a guarantee against breakage in case of pressure surges.
