Netafim SCREENGUARD SG V 2 User manual

V 002.01 - JANUARY 2021
INSTALLATION AND USER MANUAL
SCREENGUARD
™
AUTOMATIC VERTICAL SCREEN FILTER

© COPYRIGHT 2020, 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 THE USE OF NETAFIM'S PRODUCTS
OR THE 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
In the event that 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 case of inconsistency or
contradiction in interpretation or translation.

CONTENTS
Introduction
Aim of this manual
General instructions
Contact for support
Safety instructions
Description
Filter selection
Components and structure
Filter operation - general description
Dimensions
Connection diameter
Weights
Head loss
SG1 Smart Bluetooth flush controller
Control tubes
Installation
Pre-installation preparations
Tools required for installation
Unpacking and placement
Hydraulic installation
Bluetooth flush controller activation
External power supply (optional)
Initial operation
Preparations
First operation
Application operation
4
4
4
5
6
6
7
8
9
9
9
10
12
13
13
13
14
15
17
18
18
19
Maintenance
Safety instructions
Tools required for maintenance
Maintenance schedule
Screen assembly cleaning
Replacing the batteries
Paint retouching on the filter body
Algae growth control
Winterization
Troubleshooting
General malfunctions
Filter body opening
and screen assembly extraction
Flushing-nozzle replacement
Piston-gasket replacement
Piston seal replacement
Turbine brass bearing replacement
Coarse screen w/bearing replacement
Control tube fast connector
Aquative solenoid replacement
PD sensor unit replacement
Replacement parts
Filters
Spare parts
Warranty
25
25
25
26
27
28
28
29
30
31
31
32
32
33
33
33
34
35
37
38
45

4 SCREENGUARD
™
INSTALLATION AND USER MANUAL
INTRODUCTION
Aim of this manual
This document is the user-manual of the Netafim™ ScreenGuard™ vertical hydraulically controlled
automatic screen filter series. It describes the installation, operation, maintenance and troubleshooting
procedures of the filters.
General
Netafim™ congratulates you on purchasing the ScreenGuard™ self-cleaning filter. This filter is part of the
wide family of filters produced and supplied by Netafim™ for agriculture, municipal water and sewage
systems, and all types of industrial applications. All products manufactured by Netafim™ are easy to install,
use and service and don’t require special skills to operate them.
The ScreenGuard™ self-cleaning filter enables high quality filtration from various types of fluid sources
such as sewage, reservoirs, rivers, lakes, and wells.
Contact for support
This manual offers a full explanation of the the installation, operation, maintenance and troubleshooting
procedures of the ScreenGuard™ vertical filter. However, in any case you need additional support, contact
your Netafim™ local representative.

SCREENGUARD
™
INSTALLATION AND USER MANUAL 5
SAFETY
Safety instructions
General
Carefully read the installation and operation instructions prior to installation or handling of the filter.
While working with the filter all conventional safety instructions should be observed in order to avoid
danger to the workers, the public or to property in the vicinity.
WARNING
Fully release the pressure in the filter before performing installation or maintenance operations
involving opening the filter. Check the pressure gauge to be sure it is at 0 before proceeding.
WARNING
The filter may start a flushing cycle automatically at any time, without any prior indication.
No changes or modifications to the equipment are permitted without written consent provided by the
manufacturer or by its representative, on the manufacturer's behalf.
Work only with proper and standard tools.
(see Tools required for installation, page 13; and Tools required for maintenance, page 25).
Use only original parts supplied/approved by Netafim™.
Operation, Control and Maintenance
Loosening or unscrewing bolts should be done only after the pressure in the filter has been released.
Avoid splashing and water leakage in order to reduce danger of slipping, electrical danger or damage to
the equipment caused by moisture.
Always open and close valves gradually to prevent water-hammer.
Remove grease and fat material residues to avoid slipping.
Manual cleaning of filter assembly using high water pressure should be performed in accordance with
the cleaning system instructions and without endangering the operator or his working area.
When using acid or other chemical agents for the maintenance of the irrigation system or for the
cleaning of filter assembly, it should be performed in accordance with the relevant material safety
instructions and without endangering the operator or his working area.

6 SCREENGUARD
™
INSTALLATION AND USER MANUAL
DESCRIPTION
Automatic vertical screen filter selection
Netafim™ offers a selection of ScreenGuard™ automatic, vertical screen filters to fit any filtration requirement:
NOTE
2" and 3" vertical filter models are available with NPT or BSP threads.
3", 4" and 6" vertical filter models are available with
BSTD, ANSI, ISO10 or ISO16 flanges.
All filter models are available with 100, 130, 200, 300 or 500 micron
(150, 115, 80, 50 or 35 mesh) filtration grade.
(Other filtration grades are available upon request).
Components and structure
A ScreenGuard™ automatic vertical screen filter
is comprised of the following components:
1. Inlet
2. Outlet
3. Hydraulic piston
4. Hydraulic flushing turbine chamber
5. Hydraulic flushing turbine
6. Fine screen assembly
7. Flat strainer
8. Flush controller
9. Aquative operator (solenoid)
10. Suction assembly
11. Suction nozzle
12. Pressure gauge
13. Drain port
14. Flushing valve
15. Hydraulic relay
1
2
8
3
4
5
10
9
6
11
12
13
7
14
15
Model Description
Filtration
area
(cm
2
)
Max. Operating
pressure
(bar/PSI)
Max.
recommended
flow rate (m
3
/h)
Min. backflush
pressure
(bar/PSI)
Backflush
flow rate
(m
3
/h)
SG V 2" 2" 1,350 10/150 25 2/30 12
SG V 3" 3" 1,350 10/150 35 2/30 12
SG V 3" S 3" Super 2,000 10/150 50 2/30 18
SG V 4" 4" 2,000 10/150 75 2/30 18
SG V 4" S 4" Super 2,700 10/150 85 2/30 12
SG V 6" 6" 2,700 10/150 150 2/30 12

SCREENGUARD
™
INSTALLATION AND USER MANUAL 7
DESCRIPTION
Filter Operation - General Description
The Filtration Process
Water enters the filter through the inlet [1] and passes through the flat strainer [7]. The flat strainer is
designed to protect the cleaning mechanism from large dirt particles (The flat strainer is not cleaned
automatically).
The water then flows through the screen filter [6] from the inside out to the outlet [2]. The entrapped
particles form a "filtration cake" which accumulates on the screen inner surface. Over time the "cake"
build-up increases the pressure differential across the screen, and at a pre-set value (0.5 bar; 7 PSI) the
automatic self-cleaning cycle begins.
The Self-Cleaning Process
The self-cleaning process utilizes the backflush technique to effectively remove the dirt particles from the
screen. The automatic flushing cycle takes 10-30 seconds and does not interrupt the supply of process
water.
As water flows from the inlet through the flat strainer and screen to the outlet, at a pre-set pressure
differential (0.5 bar; 7 PSI) the flush controller [8] activates the hydraulic piston [3] and opens the flushing
valve [14].
The pressure in the hydraulic flushing turbine [5] chamber drops, creating suction at the flushing nozzle [11]
tips. The water and particles passing through the hydraulic flushing turbine cause the suction assembly
[10] to rotate, while the hydraulic piston [3] moves the suction assembly in an axial motion to the opposite
end of the filter. The combination of rotational and axial motion of the suction assembly ensures that the
suction nozzles sweep the entire inner surface of the screen.
When the first backflush stroke is completed, the flushing valve [14] closes and after a very short
interval the second backflush stroke is hydraulically triggered and the flushing valve reopens. The suction
assembly [10] rotates, moving with the piston in the opposite direction and returning to its original position.
The ScreenGuard™ screen filter series are hydraulically operated units. No external power source is
required. This type of control enables operation at remote installation sites.

8 SCREENGUARD
™
INSTALLATION AND USER MANUAL
DESCRIPTION
Dimensions
External dimensions and inlet and outlet locations [mm]:
Front view Side view
H
W1
W2
A1
B1
C
A2
B2
Box dimensions
Model
Height
[H]
Width 1
[W1]
Width 2
[W2]
SG V 2" 1,070 660 520
SG V 3" 1,070 660 520
SG V 3" S 1,070 660 520
Model
External dimensions Inlet and outlet location Clearance for
maintenance
[C]
Height
[H]
Width 1
[W1]
Width 2
[W2] Inlet to outlet Outlet to drain
SG V 2" 925 455 500 H [A1] 270, V [A2] 390 H [B1] 130, V [B2] 318 600
SG V 3" 925 455 500 H [A1] 270, V [A2] 390 H [B1] 130, V [B2] 318 600
SG V 3" S 1025 455 500 H [A1] 270, V [A2] 440 H [B1] 130, V [B2] 368 700
SG V 4" 1025 455 500 H [A1] 270, V [A2] 440 H [B1] 130, V [B2] 368 700
SG V 4" S 1430 455 500 H [A1] 270, V [A2] 620 H [B1] 135, V [B2] 475 1000
SG V 6" 1430 455 500 H [A1] 270, V [A2] 620 H [B1] 135, V [B2] 475 1000
Model
Height
[H]
Width 1
[W1]
Width 2
[W2]
SG V 4" 1,070 660 520
SG V 4" S 1,430 550 550
SG V 6" 1,430 550 550

SCREENGUARD
™
INSTALLATION AND USER MANUAL 9
DESCRIPTION
Connection diameter Weights
Head loss (clean filter)
The weights in the table above are order of
magnitude only - final data are issued with the
product order.
Model
Gross weight
(Kg)
Box Weight
(with filter)
(Kg)
SG V 2" T 30 44
SG V 3" T 30 42
SG V 3" F 36 50
SG V 3" ST 34 48
SG V 3" SF 40 54
SG V 4" F 42 56
SG V 4" SF 62 76
SG V 6" 66 81
Model
Inlet/outlet
connection
diameter
Backflush
connection
diameter
SG V 2" T 2"
50mm
SG V 3" T 3"
SG V 3" F 3"
SG V 3" ST 3"
SG V 3" SF 3"
SG V 4" F 4"
SG V 4" SF 4"
SG V 6" 6"
1
0.1
bar
0.01
110 100 1000
SGV2
SGV3
SGV4
m3/h
SGV6

10 SCREENGUARD
™
INSTALLATION AND USER MANUAL
DESCRIPTION
SG1 Smart Bluetooth flush controller
New technology design of hardware, professional properties, and high reliability make the SG1 the most
efficient solution for the management of the SG filter.
Main features
PD based flushing cycle activation
The controller monitors the pressure differential between the inlet and outlet by means of a PD sensor
and triggers flushing cycles accordingly.
Manual flushing cycle activation
An external START button enables manual activation of a flushing cycle.
Endless looping detection
The SG controller monitors the number of consecutive flushing cycles triggered by the PD sensor before
deciding that there is an endless looping problem. The options are: 1-10 or “no,” ignore the looping
problem.
Smartphone application
Feature a user-friendly Smartphone application that communicates with the controller via Bluetooth (10
meter range of the controller!)
The application allows:
Monitoring all the parameters of the filter's activity
Reviewing the filter activity history
Setting operational parameters: PD (pressure differential ), PD delay, Flushing interval and operation mode
Starting a flushing cycle
Monitoring battery state
The application interfaces with multiple SG1 controllers, allowing monitor and control of many filters.
The flush controller does not require any adjustment, it is entirely factory adjusted for best operation.
PD (pressure-differential) is set to 5 meters (0.5 bar)
PD delay is set to 5 seconds
Flushing interval is set to 4 hours
The operation mode is set to Time & PD
Batteries
The controller is powered by 4 x 1.5v C-size alkaline batteries (not supplied).
NOTE
If electricity is available at the filter location, the flush controller can be
powered by an external 100-240v AC to 5v DC power supply (not supplied).
(see page 17)
WARNING
When operating the controller with the external power supply, make sure that the battery
compartment is not inside the flush controller (its loose wire ends could cause short-circuit).

SCREENGUARD
™
INSTALLATION AND USER MANUAL 11
DESCRIPTION
Wiring
Main parts
Battery compartment
PD sensor (underneath the battery compartment)
PD sensor control tube nuts
Cable gland
Manual flushing button
Battery compartment
or external power supply (5v DC)
Manual flushing button
Aquative operator (solenoid)
PD sensor
Option: Filtron 1-10 flush controller
Optionally, SG filters can be supplied equipped with the Filtron 1-10 flush controller for additional control
features.
For operation of the Filtron 1-10 flush controller see its User Manual enclosed with it.

12 SCREENGUARD
™
INSTALLATION AND USER MANUAL
DESCRIPTION
Control tubes
The PE 8 mm command tubes are factory-installed and do not require any intervention during
installation of the filter.
The control-tube connection scheme below is to be used as reference while troubleshooting the filter.
Legend
a. From the filter inlet pressure point to the
pressure gauge 3-way valve.
b. From the filter inlet pressure point to the
flush controller PD sensor high-pressure
connection port (right).
c. From the Aquative solenoid to the pressure
gauge 3-way valve.
d. From the hydraulic relay to the pressure
gauge 3-way valve.
e. From the hydraulic relay to the Aquative
solenoid inlet.
f. From the hydraulic relay to the filter
hydraulic piston cap.
g. From the pressure gauge 3-way valve to the
flush controller PD sensor low-pressure
connection port (left).
h. Drain tube (no more than 2 meter long each).
a
h
e
b
c
f
d
g
h
h

SCREENGUARD
™
INSTALLATION AND USER MANUAL 13
INSTALLATION
Pre-installation preparations
Design Recommendations
If a long pipeline fill time causes a temporary high flow and low pressure situation, it is recommended to
install a pressure-sustaining valve (PSV) downstream from the filter. The PSV will ensure a controlled
fill-up of the line.
It is highly recommended to install isolation valves upstream and downstream from the filter for
maintenance and troubleshooting purposes.
It is highly recommended to install a pressure reducing valve (PRV) downstream from the filter.
It is highly recommended to install a mechanical non-return valve downstream of the filter to prevent
backflow damage to the screen.
Make sure that the filter location offers sufficient clearance to remove the cover assembly and the
screen assembly from the filter for troubleshooting (see page 8).
Avoid placing the flush pipe on a rising slope to prevent backpressure.
Minimum flush pipe diameter: 2".
Preparations for Installation
Prepare the inlet and outlet pipes according to the dimensions and type of connection (thread/flange) of
your filter (see page 9).
Ensure suitable lighting at the area of the filter to enable good visibility and safe maintenance.
Arrange suitable platforms and safety barriers to enable easy, safe access to the filter.
Allow a convenient access and adequate space around the filter for dismantling and maintenance.
Tools required for installation
Crosshead screwdriver
Spanners
Flange size Bolt and nut size Wrench size
up to 8" 5/8" (17mm) 15/16"
Unpacking and placement
Open the cardboard package and remove it from the wooden pallet.
Support the filter manually.
ATTENTION
Note the filter weight before operation and follow the safety instructions.
Detach the filter from the wooden pallet.

14 SCREENGUARD
™
INSTALLATION AND USER MANUAL
INSTALLATION
Ensure the direction of flow is according to the
arrows marked on the filter inlet and outlet.
Threaded models: Apply Teflon tape to the threads.
Flanged models: Place gaskets on the inlet and
outlet flanges (B).
Position the filter in place.
Threaded models: Tighten the inlet and outlet
connectors.
Flanged models: Fasten the inlet and outlet
flanges bolts.
Connect a pipe (C) to the flush port (D).
Minimum flush pipe diameter: 2".
Maximum flush pipe length: 10 m.
Water should be allowed to flow to the
atmosphere freely from the flush pipe.
Secure the open end of the flush pipe to
prevent movement during the flushing cycle.
Avoid placing the flush pipe on a rising slope to
prevent backpressure.
Hydraulic installation
ATTENTION
The inlet pipe should be of a diameter equal to or larger than the filter inlet diameter.
Never connect a the SG filter to an inlet pipe of a diameter smaller than the filter inlet diameter.
ATTENTION
If a PRV is required in order to protect the irrigation
system, it is highly recommended to install it
downstream of the filter.
A
C
D
B
B
Inlet
Outlet

SCREENGUARD
™
INSTALLATION AND USER MANUAL 15
INSTALLATION
Bluetooth flush controller activation
Insert batteries into the Bluetooth flush controller
1. Open the flush controller box using a cross-head
screwdriver.
2. Insert a set of 4 new batteries ( Match the poles to
the markings inside the battery housing).
2
The controller should turn on automatically.
3 short beeps followed by a long one should be
heard.
NOTE
Always use a whole set of 4 new batteries. Never use new and old batteries together.
3. Close the flush controller box (mind the
alignment of the cover gasket to ensure sealing).
16
16
16
16
2
1
1
1
1
If your SG filter is equipped with the Filtron 1-10 flush controller, see its User Manual enclosed with it.

16 SCREENGUARD
™
INSTALLATION AND USER MANUAL
INSTALLATION
Download the SG filter application to your Smartphone
1. Scan the QR code (also on the flush controller) or download it from the appropriate
app store and install it.
Notice that there are two application versions.
For Android - On Google play
For iOS - On Apple store
2. Follow the on-screen instructions.
TIP
After the installation, it is recommended to create a shortcut on your Home screen.
Link the SG filter application to the filter flush controller
Enter the SG1 Smartphone application and select your filter (BT pairing is automatic).
Scan the QR code on the flush controller to enter the user manual.
POWER SUPPLY:
6 VDC (4XC batteries)
FOR MANUAL ACTIVATION:
PRESS BUTTON FOR 5 SEC.
FOR MANUAL FLUSH, BYPASSING
THE CONTROLLER:
Please follow instructions in the
installation and maintenance manual
SCAN QR CODE
BLUETOOTH
SG CONTROLLER

SCREENGUARD
™
INSTALLATION AND USER MANUAL 17
INSTALLATION
Power the flush controller by an external power supply
If electricity is available at the filter location, the flush controller can be powered
by an external 100-240v AC to 5v DC power supply (not supplied).
5. Gently thread the
power supply wires through the cable gland.
1. Open the flush controller box using a cross-head
screwdriver.
1
1
1
1
2. Disconnect the battery compartment wires from
the terminal block using a flat-head screwdriver.
3. Remove the battery compartment and keep it
separately for possible future use.
WARNING
When operating the controller with the
external power supply, make sure that the
battery compartment is not inside the flush
controller (its exposed wire ends could
cause short-circuit).
4. Loosen the cable gland nut by hand.
9. Close the flush controller box (mind the
alignment of the cover gasket to ensure sealing).
9
9
9
9
6. Connect the power supply wires to the terminal
block (mind polarity).
7. Refasten the cable gland nut by hand.
8. Plug the power supply to the mains and make
sure the flush controller turns on.
2
4
3
6
5
7
If your SG filter is equipped with the Filtron 1-10 flush controller, see its User Manual enclosed with it.

18 SCREENGUARD
™
INSTALLATION AND USER MANUAL
INITIAL OPERATION
Preparations
Before activating the filter for the first time, go through the following check-list
carefully (No special training is required to carry out these activities).
Check that the filter is mounted in the correct flow direction.
Check that all nuts and bolts are firmly tighten.
Check that all the command tubes are connected properly and that
all connections are tight (see page 12).
Ensure the filter is well supported an stable.
Check that the Aquative operator (solenoid) selector is turned to
the AUTO position.
Make sure that the flush pipe is installed in conformity with the
specifications (see Hydraulic installation, page 14).
Make sure the controller is active by initiating a manual flush (The solenoid should click).
(To initiate a manual flush hold the MANUAL button on the flush controller pressed for 5 seconds or use
the START command in the application.)
First operation
After completing the preparation check-list above, perform the following steps:
1. Slowly open the isolation valve at the filter inlet.
Water will flow into the filter.
2. Check for leaks and repair if necessary.
3. Slowly open the isolation valve at the outlet of
the filter.
4. Ensure the flow through the filter does not exceed
the filter's maximum flow rate (see page 6).
5. Start a manual flushing cycle.
(To initiate a manual flush hold the MANUAL button
on the flush controller pressed for 5 seconds or use
the START command in the application.)
6. Check the upstream pressure during the flushing cycle ,
it should not drop below 2.0 bar (30 PSI).
8. Perform 2 additional consecutive manual flushing cycles to evacuate air from the system.
9. Monitor the upstream pressure during the flushing cycles ,
it should not drop below 2.0 bar (30 PSI). If this cannot be ensured, consult Netafim™.
NOTE
The filter flushes in two, separate consecutive flushing cycles with a few seconds pause between
them (During the pause the filter does not flush).

SCREENGUARD
™
INSTALLATION AND USER MANUAL 19
OPERATION
Welcome screen
When the user taps on the app
shortcut, a welcome screen
appears...
Application operation
The SG1 Smartphone application is easy-to-use and intuitive. The following is a quick guide to the SG1 app.
(If your SG filter is equipped with the Filtron 1-10 flush controller, see its User Manual enclosed with it).
Scanning process screen
Then, a Scanning process of the
controllers in the vicinity will
start.
Scanning result screen
The results of the controllers in
the vicinity will appear on the
Scanning result screen.
Select your controller.
Continued on the next page

20 SCREENGUARD
™
INSTALLATION AND USER MANUAL
OPERATION
Operation mode selection screen
Select
Suspended
PD only
Time and PD
Flushing interval adjustment
Set time
Your controller home screen
This screen displays the main
parameters of the filter operation:
Operation mode
Flushing interval
P. S . t im e
PD set point
NOTE
The SG controller does not
require any adjustment, it is
entirely factory adjusted for best
operation.
However, you can edit a
parameter by pressing it.
WAIT PD - the application
is acquiring PD data from
the controller (wait before
proceeding).
START - Press to start or stop a
flushing cycle.
Battery
level
BT signal
strength
D. Preferences
Select language
Select font size
Technician mode
(Only Netafim qualified
technicians are authorized
to this section by personal
password).
Netafim™ SG filter
Troubleshooting
Contact Netafim™
E. Exit the SG1 app.
A B C D E
A.
B.
C.
Home
Mode
Flushing interval
Settings
PD delay
Looping limit
Device name
Sound
PD calibration
Flushing history
Based on time
Based on pressure
differential
Manual flushings
Clear counters