Netafim D-Net 8550 User manual

V 002.01 - JULY 2017
D-Net 8550TM
USER MANUAL
3D ARM IMPACT SPRINKLER

© COPYRIGHT 2016, NETAFIM™
NO PARTS OF THIS PUBLICATION MAY BE REPRODUCED, STORED IN AN AUTOMATED DATA FILE OR MADE PUBLIC IN
ANY FORM OR BY ANY MEANS, WHETHER ELECTRONIC, MECHANICAL, BY PHOTOCOPYING, RECORDING OR IN ANY
OTHER MANNER WITHOUT PRIOR WRITTEN PERMISSION OF THE PUBLISHER.
ALTHOUGH NETAFIM™ TAKES THE GREATEST POSSIBLE CARE IN DESIGNING AND PRODUCING BOTH ITS PRODUCTS
AND THE ASSOCIATED DOCUMENTATION, THEY MAY STILL INCLUDE FAULTS.
NETAFIM™ WILL NOT ACCEPT RESPONSIBILITY FOR DAMAGE RESULTING FROM USE OF NETAFIM'S PRODUCTS OR
USE OF THIS MANUAL.
NETAFIM™ RESERVES THE RIGHT TO MAKE CHANGES AND IMPROVEMENTS TO ITS PRODUCTS AND/OR THE
ASSOCIATED DOCUMENTATION WITHOUT PRIOR NOTICE.
FOREIGN LANGUAGES
If you are reading this manual in a language other than the English language, you acknowledge and
agree that the English language version shall prevail in any case of inconsistency or contradiction in
interpretation or translation.
NOTE
All the drawings in this document are for the purpose of illustration only. The actual product details
and infrastructure condition, may differ in any actual application.

CONTENTS
Introduction
Use of symbols
Aim of this manual
Safety instructions
D-Net™ 8550 3D arm impact sprinkler
Description
Applications
Features and benefits
Specifications
Technical data
Performance
Max. lateral length - 10% flow variation
Sprinkler water trajectory
Head loss in riser tube
Installation
Introduction
Various installation configurations
Maintenance
Rinsing the nozzles
Checking the white washer
Parts and complementary products
Parts
Tools
Warranty
4
4
4
5
5
5
5
6
8
10
10
11
11
12
13
14
14
15

4 D-Net 8550TM USER MANUAL
INTRODUCTION
WARNING
The following text contains instructions aimed at preventing bodily injury or direct damage to
the crops, the product and/or the infrastructure.
CAUTION
The following text contains instructions aimed at preventing unwanted system operation,
installation or conditions that, if not followed, might void the warranty.
ATTENTION
The following text contains instructions aimed at enhancing the effective use of the instructions
in the manual.
NOTE
The following text contains instructions aimed at emphasizing certain aspects of the installation
or operation of the product.
SAFETY FOOTWEAR
The following text contains instructions aimed at preventing foot injury.
TIP
The following text provides clarification, tips or useful information.
Use of symbols
The symbols used in this manual refer to the following:
Aim of this manual
The aim of this manual is to guide the user in setting up, installation, operating and maintenance of the
D-Net™ 8550 sprinkler in its various applications.
Safety instructions
•All local safety regulations must be applied when installing, operating, maintaining and troubleshooting
the Netafim™ sprinkler irrigation system and its components.
•The effectiveness of the equipment may be jeopardized or impaired if the equipment is used in a manner
other than that specified by the manufacturer.
WARNING
In an agricultural environment - always wear protective footwear.
CAUTION
When opening or closing any manual valve, always do so gradually, to prevent damage to the
system by water hammer.

D-Net 8550TM USER MANUAL 5
D-NET™ 8550 3D ARM IMPACT SPRINKLER
Description
Applications
For vegetables and open field crops, open field nurseries, crop germination and cooling fruit orchards.
Features and benefits
More and better yields
• The D-Net™ 8550 provides outstandingly high uniformity distribution of the water due to the unique 3-D
arm that enables the highest uniformity in the market, respective to its flow rate and installation spacing.
• The D-Net™ 8550 provides maximum water-use efficiency.
Save labor cost and multiple investment in maintenance
• High robustness - The D-Net™ 8550 has special design that makes the sprinkler more resistible and
ensure high performance for a long product life.
• Extended product life - The D-Net™ 8550 is made of UV-protected materials, and it›s durable in the
presence of all climate conditions and nutrients injected in agricultural applications.
• Flexible installation - Can be installed on solid sets or on removable field stands.
• Easy to maintain - A special nozzle key is deigned in order to allow continent cleaning of the nozzle.
Specifications
• 7 different nominal flow rates: 510, 580, 680, 810, 940, 1135, 1275 l/h (at 2.5 bar pressure).
• Recommended working pressure: 2.0 to 3.0 bar (at the sprinkler head).
• Water trajectory: 24 degrees
• Inlet connector: 1/2” male threaded.
• Color-coded nozzles for easy identification.
ATTENTION
• For water containing over 2 ppm of sand, a hydrocyclone sand separator must be installed
upstream from the main filter.
• For water containing over 100 ppm of sand/silt/clay solids, pretreatment must be performed
according to the instructions of the Netafim™ expert team.
Rear nozzle
Front nozzle
3D arm
White washer
½" male thread
Axel bottom nut

6 D-Net 8550TM USER MANUAL
TECHNICAL DATA
Performance
Rectangular spacing
Nozzle Working
pressure
(bar)
Flow rate
(l/h)
Wetted
diameter*
(m)
Spacing - rectangular (m x m)
Size
(mm)
Color
code
10 x 12 11 x 12 12 x 12 13 x 12
Precipitation rate (mm/h)
2.3
+
1.8
Gray
+
lime green
1.5 395 18 3.5 3.2 2.9 2.1
2.0 456 18 3.5 3.2 2.9 2.7
2.5 510 19 4.4 4.0 3.7 3.4
3.0 559 19 4.8 4.4 4.0 3.7
2.5
+
1.8
Purple
+
lime green
1.5 449 18 3.7 3.4 3.1 2.9
2.0 519 19 4.4 4.0 3.6 3.3
2.5 580 19 4.9 4.4 4.0 3.7
3.0 635 20 5.4 4.9 4.5 4.2
2.9
+
1.8
Orange
+
lime green
1.5 527 18 4.4 4.0 3.7 3.4
2.0 608 19 5.1 4.6 4.2 3.9
2.5 680 20 5.7 5.1 4.7 4.3
3.0 745 20 6.2 5.6 5.2 4.8
3.2
+
1.8
Green
+
lime green
1.5 627 18 5.2 4.8 4.4 4.0
2.0 724 18 6 .1 5.5 5.0 4.7
2.5 810 21 6.8 6.1 5.6 5.2
3.0 887 21 7.4 6.7 6.2 5.7
3.5
+
1.8
Blue
+
lime green
1.5 728 18 6.0 5.5 5.0 4.6
2.0 841 19 7.0 6.4 5.8 5.4
2.5 940 21 7.9 7.1 6.5 6.0
3.0 1030 21 8.6 7. 8 7.2 6.6
Nozzle Working
pressure
(bar)
Flow rate
(l/h)
Wetted
diameter*
(m)
Spacing - rectangular (m x m)
Size
(mm)
Color
code
9 x 14 9 x 15 10 x 14 10 x 15
Precipitation rate (mm/h)
3.5
+
2.5
Blue
+
yellow
2.0 1015 22 8.1 7. 5 7.3 6.8
2.5 1135 22 9.0 8.4 8.1 7.6
3.0 1243 22 9.9 9.2 8.9 8.3
4.0
+
2.5
Black
+
yellow
2.0 114 5 22 9.1 8.5 8.2 7.6
2.5 1275 22 10.1 9.4 9.1 8.5
3.0 1397 22 11.1 10.3 10.0 9.3
* Performance table prepared under laboratory conditions, sprinkler head 1.0 meter above ground.
At least 0.5 mm/h.
%CU ≥ 92% ≥ 88% and < 92% ≥ 86% and < 88% < 86%
(a)
(b)
Sprinkler
Lateral

D-Net 8550TM USER MANUAL 7
TECHNICAL DATA
Performance (cont'd)
Triangular spacing - isosceles**
Nozzle Working
pressure
(bar)
Flow rate
(l/h)
Wetted
diameter*
(m)
Spacing - rectangular (m x m)
Size
(mm)
Color
code
10 x 12 11 x 12 12 x 12 13 x 12
Precipitation rate (mm/h)
2.3
+
1.8
Gray
+
lime green
1.5 395 18 3.5 3.2 2.9 2.1
2.0 456 18 3.5 3.2 2.9 2.7
2.5 510 19 4.4 4.0 3.7 3.4
3.0 559 19 4.8 4.4 4.0 3.7
2.5
+
1.8
Purple
+
lime green
1.5 449 18 3.7 3.4 3.1 2.9
2.0 519 19 4.4 4.0 3.6 3.3
2.5 580 19 4.9 4.4 4.0 3.7
3.0 635 20 5.4 4.9 4.5 4.2
2.9
+
1.8
Orange
+
lime green
1.5 527 18 4.4 4.0 3.7 3.4
2.0 608 19 5.1 4.6 4.2 3.9
2.5 680 20 5.7 5.1 4.7 4.3
3.0 745 20 6.2 5.6 5.2 4.8
3.2
+
1.8
Green
+
lime green
1.5 627 18 5.2 4.8 4.4 4.0
2.0 724 19 6 .1 5.5 5.0 4.7
2.5 810 21 6.8 6.1 5.6 5.2
3.0 887 21 7.4 6.7 6.2 5.7
3.5
+
1.8
Blue
+
lime green
1.5 728 18 6.0 5.5 5.0 4.6
2.0 841 19 7.0 6.4 5.8 5.4
2.5 940 21 7.9 7.1 6.5 6.0
3.0 1030 21 8.6 7. 8 7.2 6.6
Nozzle Working
pressure
(bar)
Flow rate
(l/h)
Wetted
diameter*
(m)
Spacing - rectangular (m x m)
Size
(mm)
Color
code
9 x 14 9 x 15 10 x 14 10 x 15
Precipitation rate (mm/h)
3.5
+
2.5
Blue
+
yellow
2.0 1015 22 8.1 7. 5 7.3 6.8
2.5 1135 22 9.0 8.4 8.1 7.6
3.0 1243 22 9.9 9.2 8.9 8.3
4.0
+
2.5
Black
+
yellow
2.0 114 5 22 9.1 8.5 8.2 7.6
2.5 1275 22 10.1 9.4 9.1 8.5
3.0 1397 22 11.1 10.3 10.0 9.3
* Performance table prepared under laboratory conditions, sprinkler head 1.0 meter above ground.
At least 0.5 mm/h.
**Do not confound isosceles with equilateral:
• An isosceles triangle is a triangle in which two sides are of equal length. The distance between 2
adjacent sprinklers on the same lateral (a) is not equal to the distance between 2 sprinklers on adjacent
laterals. The height of the triangle represents the distance between adjacent laterals (b).
Isosceles is usually referred to in open-field applications.
• An equilateral triangle is a triangle in which all three sides are equal. The distance between 2 adjacent
sprinklers on the same lateral is equal to the distance between 2 sprinklers on adjacent laterals.
Equilateral is occasionally referred to in orchards due to the tree planting pattern.
(a)
(b)
Sprinkler
Lateral
%CU ≥ 92% ≥ 88% and < 92% ≥ 86% and < 88% < 86%

8 D-Net 8550TM USER MANUAL
TECHNICAL DATA
Max. lateral length - 10% flow variation
Inlet pressure: 3.0 bar
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 126 130 143 144 156
1% 135 140 154 156 169
Flat terrain 0 153 160 165 180 195
Downhill -1% 162 170 187 192 208
-2% 171 180 198 204 221
Nozzle size
2.3 + 1.8,
510 l/h*
Lateral: PE 40 mm ID: 36.8 mm Lateral: PE 50 mm ID: 45.4 mm
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 117 120 132 132 143
1% 126 130 143 156 156
Flat terrain 0 135 150 154 168 182
Downhill -1% 144 160 165 180 195
-2% 153 170 176 192 208
Nozzle size
2.5 + 1.8,
580 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 108 110 121 132 130
1% 117 120 132 144 143
Flat terrain 0 126 130 143 156 156
Downhill -1% 135 140 154 168 169
-2% 144 150 165 168 182
Nozzle size
2.9 + 1.8,
680 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 99 100 110 120 117
1% 108 110 121 132 130
Flat terrain 0 117 120 132 132 143
Downhill -1% 117 130 143 144 156
-2% 126 140 143 156 169
Nozzle size
3.2 + 1.8,
810 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 90 100 99 108 117
1% 99 100 110 120 117
Flat terrain 0 99 110 121 120 130
Downhill -1% 108 120 121 132 143
-2% 117 120 132 144 143
Nozzle size
3.5 + 1.8,
940 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 81 90 99 96 104
1% 90 90 99 108 117
Flat terrain 0 90 100 110 108 117
Downhill -1% 99 100 110 120 130
-2% 99 110 121 120 130
Nozzle size
3.5 + 2.5,
1135 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 81 80 88 96 104
1% 81 90 99 96 104
Flat terrain 0 90 90 99 108 117
Downhill -1% 90 100 99 108 117
-2% 90 100 110 120 117
Nozzle size
4.0 + 2.5,
1275 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 162 170 176 180 195
1% 180 190 209 216 221
Flat terrain 0 207 220 242 252 273
Downhill -1% 234 250 264 288 299
-2% 252 270 286 312 325
Nozzle size
2.3 + 1.8,
510 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 153 160 165 168 182
1% 171 180 187 204 208
Flat terrain 0 198 210 220 240 247
Downhill -1% 216 230 242 264 273
-2% 225 250 264 288 299
Nozzle size
2.5 + 1.8,
580 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 144 150 154 168 169
1% 162 170 176 192 195
Flat terrain 0 180 190 198 216 221
Downhill -1% 189 210 220 240 247
-2% 207 220 242 252 273
Nozzle size
2.9 + 1.8,
680 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 126 140 143 156 156
1% 144 150 165 168 182
Flat terrain 0 162 170 176 192 208
Downhill -1% 171 180 198 204 221
-2% 180 200 209 228 234
Nozzle size
3.2 + 1.8,
810 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 117 130 132 144 143
1% 135 140 154 156 169
Flat terrain 0 144 160 165 180 182
Downhill -1% 153 170 176 192 208
-2% 162 180 187 204 221
Nozzle size
3.5 + 1.8,
940 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 108 120 121 132 130
1% 117 130 132 144 156
Flat terrain 0 126 140 143 156 169
Downhill -1% 135 150 154 168 182
-2% 144 160 165 180 195
Nozzle size
3.5 + 2.5,
1135 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 108 110 121 120 130
1% 108 120 132 132 143
Flat terrain 0 117 130 143 144 156
Downhill -1% 126 140 143 156 169
-2% 135 150 154 168 182
Nozzle size
4.0 + 2.5,
1275 l/h*
*Nominal flow rate at 2.5 bar working pressure.

D-Net 8550TM USER MANUAL 9
TECHNICAL DATA
Max. lateral length - 10% flow variation
Inlet pressure: 3.0 bar
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 180 190 198 204 208
1% 216 220 242 252 260
Flat terrain 0 252 270 286 300 312
Downhill -1% 279 300 319 348 364
-2% 306 330 352 384 403
Nozzle size
2.3 + 1.8,
510 l/h*
Lateral: FlexNet™ 2" ID: 51.5 mm Lateral: FlexNet™ 3" ID: 78.3 mm
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 171 180 187 192 195
1% 198 210 220 228 247
Flat terrain 0 234 250 264 276 299
Downhill -1% 261 280 297 312 338
-2% 279 300 330 348 364
Nozzle size
2.5 + 1.8,
580 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 162 170 176 180 195
1% 180 190 209 216 221
Flat terrain 0 207 220 242 252 260
Downhill -1% 234 250 264 288 299
-2% 252 270 286 312 325
Nozzle size
2.9 + 1.8,
680 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 144 160 165 168 182
1% 171 180 187 192 208
Flat terrain 0 189 200 209 228 234
Downhill -1% 207 220 242 252 273
-2% 225 240 253 276 286
Nozzle size
3.2 + 1.8,
810 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 135 150 154 156 169
1% 153 160 176 180 195
Flat terrain 0 171 180 198 204 221
Downhill -1% 189 200 220 228 247
-2% 198 220 231 252 260
Nozzle size
3.5 + 1.8,
940 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 126 130 143 144 156
1% 135 150 154 168 169
Flat terrain 0 153 160 176 180 195
Downhill -1% 162 180 187 204 208
-2% 180 190 198 216 234
Nozzle size
3.5 + 2.5,
1135 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 117 130 132 144 143
1% 135 140 143 156 169
Flat terrain 0 144 150 165 168 182
Downhill -1% 153 170 176 192 195
-2% 162 180 187 204 208
Nozzle size
4.0 + 2.5,
1275 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 252 260 264 276 273
1% 369 380 396 408 416
Flat terrain 0 522 560 594 636 663
Downhill -1% 648 700 759 804 858
-2% 738 440 473 504 455
Nozzle size
2.3 + 1.8,
510 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 252 260 264 264 273
1% 351 360 374 396 403
Flat terrain 0 486 520 550 576 611
Downhill -1% 594 640 693 732 780
-2% 675 730 781 456 481
Nozzle size
2.5 + 1.8,
580 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 243 250 253 264 260
1% 324 340 352 372 377
Flat terrain 0 441 470 495 528 559
Downhill -1% 531 570 616 648 689
-2% 594 650 693 744 442
Nozzle size
2.9 + 1.8,
680 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 234 240 242 252 260
1% 297 320 330 348 351
Flat terrain 0 396 420 451 468 494
Downhill -1% 468 500 539 576 611
-2% 522 570 605 648 689
Nozzle size
3.2 + 1.8,
810 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 216 230 231 240 247
1% 279 300 308 324 338
Flat terrain 0 360 380 407 432 455
Downhill -1% 423 450 484 516 546
-2% 468 510 550 588 624
Nozzle size
3.5 + 1.8,
940 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 207 220 220 228 234
1% 261 270 286 300 312
Flat terrain 0 315 340 363 384 403
Downhill -1% 369 400 429 456 481
-2% 405 440 473 504 533
Nozzle size
3.5 + 2.5,
1135 l/h*
Slope
Distance between sprinklers (m)
910 11 12 13
Max. lateral length (m)
Uphill 2% 198 210 220 216 234
1% 243 260 275 288 299
Flat terrain 0 297 320 341 360 377
Downhill -1% 342 370 396 420 442
-2% 378 400 440 468 494
Nozzle size
4.0 + 2.5,
1275 l/h*
*Nominal flow rate at 2.5 bar working pressure.

10 D-Net 8550TM USER MANUAL
Sprinkler water trajectory
A
B
A. Distance - Distance of max. trajectory height from sprinkler nozzle.
B. height - Elevation of max. trajectory height above ground.
Trajectory height above sprinkler nozzle
The maximum trajectory height above the sprinkler nozzle is relevant in the following cases:
• When sprinklers are used under the canopy to prevent wetting the foliage.
• When sprinklers are used in a net-house or inside a roofed structure such as a glasshouse, to prevent
wetting the net or the ceiling.
TECHNICAL DATA
Riser tube: ½" , ID 15.0 mm
Riser
tube
length
(m)
Flow rate* (l/h)
510 580 680 810 940 1135 1275
Head loss (bar)
0.4 0.003 0.003 0.004 0.006 0.008 0.010 0.013
0.8 0.005 0.006 0.009 0.012 0.015 0.021 0.026
1.2 0.008 0.010 0.013 0.017 0.023 0.031 0.039
Riser tube: ¾" , ID 20.5 mm
Riser
tube
length
(m)
Flow rate* (l/h)
510 580 680 810 940 1135 1275
Head loss (bar)
0.4 0.001 0.001 0.001 0.001 0.002 0.002 0.003
0.8 0.001 0.001 0.002 0.003 0.003 0.005 0.006
1.2 0.002 0.002 0.003 0.004 0.005 0.007 0.009
*Nominal flow rate at 2.5 bar working pressure.
Nozzle Working
pressure
(bar)
Trajectory (m)
Size
(mm)
Color
code Height Distance
2.3
+
1.8
Gray
+
lime green
2.0 1.75 6.00
2.5 1.85 6.30
3.0 2.00 6.60
2.5
+
1.8
Purple
+
lime green
2.0 1.75 6.20
2.5 1.85 6.30
3.0 2.00 6.60
2.9
+
1.8
Orange
+
lime green
2.0 1.85 6.20
2.5 2.00 6.30
3.0 2.10 6.60
3.2
+
1.8
Green
+
lime green
2.0 1.85 6.20
2.5 2.00 6.40
3.0 2.15 6.80
3.5
+
1.8
Blue
+
lime green
2.0 1.85 6.30
2.5 2.10 6.80
3.0 2.30 7.0 0
3.5
+
2.5
Blue
+
yellow
2.0 1.85 6.30
2.5 2.10 7.0 0
3.0 2.30 7.10
4.0
+
2.5
Black
+
yellow
2.0 1.85 6.40
2.5 2.00 7. 20
3.0 2.20 7. 30
Water trajectory angle: 24 degrees
Head loss in riser tube
Riser
tube
length
(m)
Flow rate* (l/h)
510 580 680 810 940 1135 1275
Head loss (bar)
1.2 0.087 0.110 0.145 0.197 0.257 0.358 0.439
Riser tube: OD 12.0 mm , ID 9.0 mm

D-Net 8550TM USER MANUAL 11
Introduction
CAUTION
Assembly must be done gently. Do not overtighten or use excessive force.
Tools required
•20 mm spanner
Various installation configurations
Netafim™ sprinklers can be installed at a convenient height in different configurations, to suit the needs of
various crops and field conditions.
Among the various installation options:
• Mega Stand™ - a ½" diameter robust and durable modular sprinkler stand suitable for a variety of
agriculture and mining irrigation applications.
• IMP SPR stand™ - a ½" diameter stand, satisfactorily used by farmers all over the globe for many years.
It became a classic in open field and orchard irrigation due to its durability, simplicity and versatility.
It can accommodate any type of ½" sprinkler.
• Solid set - Netafim™ offers a comprehensive range of sockets and reducer couplings dedicated to
the proper connection of sprinklers to solid-set riser pipes (PVC or other rigid pipes). Usage of these
accessories ensures appropriate, safe operation and longevity of the sprinklers.
See the installation manual for each one of the above installation options at
http://www.netafim.com/irrigation-products-technical-materials
INSTALLATION
ATTENTION
When installing a Netafim™ impact hammer sprinkler (such as
D-Net™) on a solid set riser pipe of the same thread size, make
sure to allow clearance for the free rotation of the axel bottom
nut.
If sufficient clearance is not allowed and the axel bottom
nut comes in contact with any internal part of the piping, the
sprinkler will not rotate.
Always use a Netafim™ dedicated socket specially designed to
allow the required clearance.

12 D-Net 8550TM USER MANUAL
To assure proper operation of the sprinkler, a simple inspection and maintenance procedure should be
carried out regularly.
The new nozzle clip tool allows to detach and attach the D-Net 8550™ sprinkler nozzles quickly and easily.
Rinsing the nozzles
Frequency: Before the beginning of each growing season
Action:
1. Detach the 2 nozzles from the sprinkler using the
dedicated nozzle clip tool supplied with the sprinkler.
NOTE
To detach the front nozzle:
Rotate and hold the 3D arm so that it doesn't get
in the way of the nozzle-opener.
A. Place the nozzle clip tool onto the nozzle and rotate
it 1/8 of a turn counterclockwise. You should feel it
snap open.
2. Release the nozzle from the nozzle clip tool.
3. Clean each nozzle opening from the outside with a water jet or pressurized air.
4. Visually inspect the nozzles. If a nozzle looks damaged, replace it with a new one.
5. Reattach the 2 nozzles using the dedicated nozzle-opener. You should feel it snap into place.
NOTE
Make sure to place each nozzle back in its original location. The rear nozzle (lime green/yellow)
should always be in the lower location.
MAINTENANCE
B. Pull the nozzle out with the nozzle clip tool.
SNAP!
NOTE
When detaching the front nozzle:
Hold the 3D arm so it doesn't get in the
way.

D-Net 8550TM USER MANUAL 13
MAINTENANCE
Checking the white washer
Frequency: Before the beginning of each growing season
Action:
1. Remove the sprinkler from the stand using a 20 mm
spanner.
2. Visually inspect the white washer at the bottom of the
sprinkler.
During regular operation of the sprinkler, the white washer
gradually wears thinner. Its original thickness is 1.5 mm.
3. If the white washer has reached half its original thickness
or less, replace it with a new one using a 16 mm spanner
to open the bolt at the bottom of the sprinkler.
NOTE
Make sure to place the white washer in between
the two black washers.
4. Screw back the bolt using a 16 mm spanner.
5. Remove the old Teflon tape from the sprinkler thread and
apply 3 layers of new Teflon tape to prevent leakage.
6. Re-connect the sprinkler to the stand using a 20 mm
spanner.
NOTE
It is recommended to replace the white washer
every 2000 irrigation hours.
1
2
3

14 D-Net 8550TM USER MANUAL
Parts
D-Net™ 8550 catalog numbers
Nozzle size
(mm) Nozzle color code
Flow rate*
(l/h) Catalog number
2.3 + 1.8 Gray + lime green 510 60100-000990
2.5 + 1.8 Purple + lime green 580 60100-001000
2.9 + 1.8 Orange + lime green 680 60100- 001010
3.2 + 1.8 Green + lime green 810 60100 -001030
3.5 + 1.8 Blue + lime green 940 60100- 001040
3.5 + 2.5 Blue + yellow 113 5 60100- 001045
4.0 + 2.5 Black + yellow 1275 60100-001046
*Nominal flow rate at 2.5 bar working pressure
Packaging data
Model
Units
p/box
Box size
(cm x cm x cm)
Box weight
(Kg)
Boxes
p/pallet
Total units
p/pallet
Pallet weight
(Kg)
D-Net™ 8550 168 54 x 36 x 33 12.0 18 3024 240
*Two nozzle clip tools are supplied with each box of 168 D-Net 8550™ sprinklers.
D-Net™ 8550 sprinkler nozzles
Front nozzles
Size (mm) 2.3 2.5 2.9 3.2 3.5 4.0
Color code
Gray Purple Orange Green Blue Black
Catalog number 60100-001140 60100-001150 60100-001160 60100-001170 60100-001180 60100-001181
Rear nozzles
Size (mm) 2.3 2.5
Color code
Lime green Yellow
Catalog number 60100-001300 60100-001310
Tools
PARTS AND COMPLEMENTARY PRODUCTS
Product
description
D-Net™ 8550 clip nozzle tool D-Net spanner
Catalog
number
1 unit: 60100 -001410 60100-001075
50 units/box: 60100-001420
D-Net™ 8550 washer
Product
description
D-Net™ 8550
white washer 22
Catalog number 60100-001076

D-Net 8550TM USER MANUAL 15
WARRANTY
Netafim™ warrants all the components of the D-Net™ 8550 sprinkler to be free of substantial defects in
material and workmanship for a period of no more than 1 (one) year from the date of purchase.
If a defect is discovered during the applicable warranty period, Netafim™ will repair or replace, at its
discretion, the product or the defective part.
This warranty does not extend to repairs or replacements of a D-Net™ 8550 sprinkler or part resulting
from misuse, negligence, alteration, force majeure, lightning, improper installation or improper
maintenance, including any maltreatment of the D-Net™ 8550 sprinkler or any part of the irrigation
systems.
If a defect arises in your Netafim™ product during the warranty period, contact your Netafim™ supplier.
Limited warranty
This warranty is subject to the terms and conditions contained in Netafim's official warranty statement in
force at the time of application.
For the full text of Netafim's official warranty statement, go to:
http://www.netafim.com/irrigation-products-technical-materials

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