Rotor Sprinkler

Lawn Irrigation - large radius & efficient use of water

Rotor sprinklers are used as pop-up sprinklers to water lawns in your irrigation system. As soon as a solenoid valve in the irrigation system releases the water for the respective sprinkler circuit, the water pressure in the PE pipe increases and the riser of the sprinkler goes up. The gear in the sprinkler is activated by the water flow and directs the water jet across the set sector. Sprinklers with 10 cm risers are the standard for lawn irrigation.

Correct positioning the rotor Sprinkler - head-to-head position for uniform precipitation

The built-in nozzle ensures a jet of water that reaches both the near, medium and far areas of your lawn. However, as with any rotary sprinkler, the further away the area from the sprinkler, the less the precipitation rate within your irrigation system. For this reason, sprinklers should be positioned head-to-head to ensure even precipitation. Head-to-head arrangement means that where the radius of one rotor sprinkler ends, the next one is already in place. The radii of the sprinklers overlap and together produce a uniform precipitation. The nozzle installed in the rotor sprinkler determines the radius. The arc can be adjusted between 50° and 360° with a special tool available from us.

With our free DVS Irrigation Planner, you can plan your irrigation system yourself in just a few steps. The planner also visualises which areas are sufficiently irrigated and where you should make adjustments if necessary. Once you have finished, you will receive the material list for your project and you also have the option of sending your plan to the irrigation professionals at DVS Beregnung to put the finishing touches to your planning.

Golf gear sprinklers
Golf gear sprinklers

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Hunter gear sprinklers

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Rain Bird Rotors
Rain Bird Rotors

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Sports Field Rotor +00/06/12 riser

Irrigation of large lawns with center-field sprinklers and...

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Hunter PGJ and Rain Bird 3004 for small irrigation projects

For a small garden with a small lawn area, Hunter PGJ-04 or Rain Bird 3004 rotor sprinklers can be used with a radius from approximately 4.0 m to approximately 10 m. PGJ and 3000 series sprinklers have a ½" female thread fitting.

¾" sprinklers from Hunter (PGP or I-20) and Rain Bird (5004) for medium and longer throws

For the irrigation of medium and large rectangular lawns, the PGP Ultra rotor sprinkler and the particularly high-quality Hunter I-20 or I-20-SS sprinklers, with stainless steel risers, can be used. As an equivalent, we have the rotor sprinkler 5004 from Rain Bird in various quality levels, with flow stop as well as in stainless steel design. The advantage of these top models of the manufacturers Hunter and Rain Bird are integrated flow stop valves, high-quality materials of the components as well as a heavy-duty retract spring for the riser.

1" Rotor sprinklers for public greens, sports grounds and tennis courts

When throw distances of more than 12 m are required, then the 1" sprinklers from the manufacturers Hunter and Rain Bird come into play. In order to irrigate a particularly large lawn area, a sufficiently strong water supply in terms of pressure and available water volume is very important.
Order rotor sprinklers from Hunter and Rain Bird in the DVS Beregnung online shop now.

Position correctly - select nozzles smartly - irrigate efficiently

Rotor sprinklers must be placed head-to-head for even water distribution. This means that at the point where the spray radius of one sprinkler ends, the next one should be placed. It is obvious, therefore, that a single rotor sprinkler cannot be run efficiently. For example, on a square lawn of 10x10 m, one sprinkler must be placed in each corner in order to optimally water the lawn. The nozzles are designed in such a way that the interaction of the sprinklers and the overlapping of the spray radii produce uniform precipitation. In turn, this means that each individual rotor sprinkler distributes water unevenly. The farther away the lawn area is from the sprinkler, the lower the precipitation. For this reason, when planning an irrigation system for your garden, do invest in the recommended number of rotor sprinklers. Planning in too few sprinklers means that the efficiency of your irrigation system will suffer. In this case, there will be areas in your garden that will receive too much or not enough water. This will result in dry spots on the lawn as well as wasted water in other areas. Only when the rotor sprinklers are perfectly arranged is it possible to water the entire lawn area evenly within a defined watering time.
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In the free planning software DVS Irrigation Planner, the precipitation distribution is simulated in step 2, the sprinkler placement. This allows you to see exactly whether the sprinklers are placed correctly and whether an even precipitation is possible with the subsequent irrigation system.

Special characteristics: precipitation depends on the chosen irrigation sector

Since the precipitation of a rotor sprinkler depends on the set sector, special attention must be paid to the choice of nozzles during planning. The reason for this is that the precipitation of a sprinkler is halved if the arc is changed from 90° to 180°, for example. This is because the sprinkler now needs twice the time to direct the water jet over the set area.
There are 3 possible solutions for the uniform water distribution of rotor sprinklers.

1. Sprinklers with the same nozzle and the same arc are placed on one irrigation circuit. Example: 4 90° rotor sprinklers type Hunter I-20 with no. 4 nozzle are placed together on one circle. On the second circle there are 4 180° sprinklers with a no. 4 nozzle. This means that circle 1 has twice as much precipitation as circle 2, since the 90° sprinklers pass over the lawn twice as often. The water consumption is identical for each circle, since 4 x 4 nozzles are used in each case. The watering time must be adjusted to the precipitation of the rotor sprinklers - circle 1 therefore only runs for half as long as circle 2. If circle 2 runs for 40 minutes, then the rotor sprinklers in circle 1 only run for 20 minutes.

2. Matching the nozzles for rotor sprinklers with e.g. 90° sector and 180° sector on the same circuit. For 90° sectors no. 2 nozzles are used and for 180° sectors no. 4 nozzles. The nozzles are designed in such a way that the water quantity varies with approximately the same throw. The name of the nozzles indicates the ratio. For example, an 8-nozzle can be used for a 360° sector, a 4-nozzle for a 180° sector and a 2-nozzle for a 90° sector on the same circle. By choosing the nozzles accordingly, the rotor sprinklers then still have approximately the same precipitation amongst each other.

3. Use of MPR nozzles for rotor sprinklers. Here, the manufacturers Hunter and Rain Bird have provided the option of using a separate nozzle for each required sector, 90°, 180°, 270° or 360°. The advantage of the MPR nozzles is their uniform radius and precipitation distribution. A disadvantage, however, is the 50% higher precipitation of the rotor sprinklers with MPR nozzles (15 l/m² per hour precipitation instead of 10 l/m² per hour) compared to the standard nozzles and the Hunter MP Rotator. With high capacity water sources, such as from a well, this problem can be offset. With weaker water sources, however, this leads to a lower number of sprinklers per circle and thus to higher installation costs of your irrigation system. In heavier soils, the higher precipitation may make a Cycle & Soak setting necessary, as the amount of water spread will not percolate into the soil quickly enough and more time will be needed to soak into the soil.