Features:
Sigma
* Patent pending
• Based on Amiad’s proven suction-scanning
screen technology
• Very Large Screen Area
• High flow rate per unit
• Made of polymeric materials; fully resistant
to corrosion and most fertilizers (PH > 5)
• Short and efficient self-cleaning process
• Very low energy consumption during flush
• Small footprint compared to other automatic filters
• Unique design, easy to maintain, few tools required
• Applications: Agriculture Irrigation open fields,
landscape, green house, aquaculture
• Optional electronic controller AC or DC
How the Sigma Filter Works
General
The Amiad “Sigma” filter is an automatic filter, with multiple screens operated by a single hydraulic turbine mechanism.
With a capacity up to 120 m3
/h (528 gpm) and from 80-300 micron filtration degree. Inlet/Outlet connections are
100 mm (4”) diameter, and exhaust valve is 50 mm (2”).
The Filtration
Raw water enters from the filter inlet and passes through the multi-screens. Clean water flows through the filter
outlet. The gradual dirt buildup on the inner screen surface causes a filter cake to develop, with a corresponding
increase in the pressure differential across the multi-screens. A pressure differential switch (hydraulic or electric)
senses the pressure differential and when it reaches a pre-set value, the self-cleaning process begins.
The Control System
The “Sigma” operation and cleaning cycle is controlled and monitored by a hydraulic rinse control, or an electronic
battery /AC controller.
During the self-cleaning cycle the rinse control operates the exhaust valve by means of an hydraulic command, and
when the cycle is complete, it automatically closes the exhaust valve and waits for the next cycle. In the case of the
electronic controller, the self-cleaning cycle is triggered by the DP switch, then the AC or DC controller switches the
solenoid to open or close the exhaust valve by means of a hydraulic command, when cycle is complete, the controller
will shut the exhaust valve and wait for another cleaning command.
The self-cleaning cycle begins under any one of the following conditions:
1. Receiving a signal from the Pressure Differential Device - which is preset at 0.5 bar.
2. Time interval parameter set at the controller (electronic controller only).
3. Manual Start, triggered by 3 way ball valve or via electronic controller keypad.
The electronic controller also provides:
• Flush cycles counter
• Alerts output – low battery, DP cycle
Arkal Amiad Sigma self cleaning filtration
NEW
Multi-screen, polymeric, self-cleaning
Sigma Pro Series filter combining Amiad’s suction-scanning
technology with a unique mechanism and
innovative design
4” 6” 8”
30-120 m /h50-180 m /h50-280 m /h
flow rate
(132-528 gpm) (220-792 gpm) (220-1,233 gpm)
inlet/outlet 100 mm 150 mm 200 mm
diameter (4”)(6”) (8”)
filtration 80-500 micron
degrees
min. operating
pressure during1.5 bar/22 psi (electronic controller)
2.2 bar/32 psi (hydraulic controller)
flush cycle
max. operating 10 bar
pressure(145 psi)
features:
Reliable and durable •Compact design and small footprint
• Proprietary suction-scanning cleaning technology •Easy installation and maintenance
• Large filtration area•Ideal for open-field irrigation, landscaping,
• Polymeric housing - corrosion and fertilizer resistantgreenhouse and aquaculture applications
• Low water and energy consumption •AC/DC electronic controller (optional)
How the Sigma Pro Filter Works
General
Amiad’s Sigma Pro is a multi-screen, polymeric filter that combines Amiad’s unique suction-scanning screen technology
with a compact design and an innovative self-cleaning mechanism. The filter capacity range is up to 280 m /h (1,233 gpm)
3
and with filtration degrees from 80-500 micron. Inlet/outlet connections are available in 100 mm (4”), 150 mm (6”) and
200 mm (8”) diameter. Filters include a 50 mm (2”) exhaust valve.
The Filtration Process
Raw water enters through the filter inlet and passes through the multiple screens. Clean water flows through the
filter outlet. The gradual dirt buildup on the screens’ inner surface causes a filter cake to develop, which creates
an increase in the pressure differential across the filter system. A differential pressure (DP) switch (hydraulic or
electronic) senses the pressure differential and when it reaches a pre-set value, the self-cleaning process begins.
The Control System
The Sigma Pro operation and cleaning cycle is controlled and monitored by a hydraulic rinse controller or an electronic
controller. During the self-cleaning cycle, the rinse controller operates the exhaust valve by hydraulic command.
When the cleaning cycle is complete, the exhaust valve is automatically closed and is ready for the next cycle. With
an electronic controller, the self-cleaning cycle is triggered by the DP switch, then the AC or DC controller switches
the solenoid to open or close the exhaust valve by hydraulic command. When the self-cleaning cycle is complete, the
controller signals the exhaust valve to close and the system is ready for the next cleaning cycle.
The electronic controller also provides:
•Flush cycle counter
•Alerts – low battery, DP cycle
The Self-Cleaning Process
The self-cleaning cycle begins under any one of the following conditions:
1. Receiving a signal from the DP switch, preset at 0.5 bar (7 psi)
2. Time interval parameter set at the controller (electronic controller only)
3. Manual start, triggered by 3-way ball valve or via electronic controller keypad
The flush water flows through the hydraulic turbines, causing the suction-scanners to spin. The drop in pressure
forces the suction-scanners into an axial movement upward, ensuring that the nozzles sweep and clean the entire
inner side of the fine screens.
Sigma Pro models
Amiad’s Sigma Pro series consists of the following models:Exhaust Valve
•Sigma Pro 4” for up to 120 m /h (528 gpm)
3
•Sigma Pro 6” for up to 180 m /h (792 gpm)
3
3
•Sigma Pro 8” for up to 280 m /h (1,233 gpm)
Hydraulic Turbines
Sigma Pro 6” and 8” filters are to be installed on a flat surface only
Sigma Pro 4”Dim: mm (inch)
672 (26”)
1567 (62”)
1258 (50”)
205 (8”)4” IN
292 (11”)
4” OUT
Sigma Pro 6”A
674 (26.5")
DRAINAGE
B
1588 (62.5")1905 (75") 6" OUT C
782 (30.8")6" IND
272 (10.7")
700 (27.6")E
Sigma Pro 8”
NAMEDATESUBJECT PROJECT:MATERIAL:
DRAWN
674 (26.5") CHECKEDELENA06/07/20166'' SIGMA FILTERCAT. NO:
MARINA
12/07/2016
APPROVEDMARINA12/07/2016PART NAME TITLE:054002-000052
B.O.M.OLEG12/07/2016ASSEMBLY DRAWINGDRW. NO:Rev. F
Condential property information.054002-000052 CA
Amiad Water Systems Ltd.SCALE: NOSIZE: A3SHEET 1 OF 1
reserves therights to make changes.
All copy rights reserved toRef.6 SIGMA FILTER FOR CUSTOMER
REV.DATEDESCRIPTION NAMEAmiad Water Systems Ltd.Backup Drawing:
1588 (62.5")1905 (75")8" OUT
782 (30.8")8" IN
272 (10.7")
758 (29.8")
NAMEDATESUBJECT/PROJECT:MATERIAL:
DRAWNELENA09/11/2014
8'' SIGMA FILTER
CHECKED CAT. NO:
APPROVEDPART NAME/TITLE:
B.O.M.ASSEMBLY DRAWING DRW. NO:Rev.
Confidential property information.8'' SIGMA0
All Flanges According to DIN; BSTD; ANSIAmiad Water Systems Ltd.
reserves therights to make changes. SCALE: NOSIZE: A3SHEET 1 OF 1
All copy rights reserved toRef.8'' SIGMA FILTER FOR CUSTOMER
REV.DATED E S C RP II TO NN A M E Amiad Water Systems Ltd.Backup Drawing:
Dim: mm (inch)Pressure Loss Graph
(in clean water)
672 (26”)
psi/bar
0.4
5.0
4.0
3.00.2
2.0
1567 (62”) 1.40.1
0.08
0.06
0.7
0.50.041258 (50”)
0.4
205 (8”)4” IN0.30.02
0.2
0.01
3
292 (11”)m /hr1020 40 60 100 200300
4” OUTgpm
60 100200400 600 1000
A
674 (26.5")
psi/bar DRAINAGE
0.4
5.0
4.0 B
3.00.2
2.0
1.40.1C
0.08
1588 (62.5")1905 (75") 6" OUT 0.70.06
0.04
0.5
0.4
782 (30.8")6" IN 0.30.02 D
0.2
272 (10.7")m /hr1020 40 60 100 200300
0.01
3
gpm
700 (27.6")60 E100 200 400 600 1000
674 (26.5") NAMEDATESUBJECT PROJECT:MATERIAL:
DRAWNELENA06/07/20166'' SIGMA FILTER
CHECKEDMARINA12/07/2016CAT. NO:
054002-000052
APPROVEDMARINA12/07/2016PART NAME TITLE:psi/bar
0.4
B.O.M.OLEG12/07/2016ASSEMBLY DRAWINGDRW. NO:054002-000052 CRev. F
Condential property information. A
Amiad Water Systems Ltd.5.0SIZE: A3SHEET 1 OF 1
SCALE: NO
reserves therights to make changes.
All copy rights reserved toRef. 4.06 SIGMA FILTER FOR CUSTOMER
REV.DATEDESCRIPTION NAMEAmiad Water Systems Ltd. Backup Drawing:
3.00.2
2.00.1
1.4
1588 (62.5")1905 (75")8" OUT0.70.08
0.06
0.04
0.5
782 (30.8")272 (10.7") 8" IN0.40.02
0.3
0.2
0.01
100
3
gpm
758 (29.8") m /hr10 60 20 40 60 400 600 200300
1000
200
100
NAMEDATESUBJECT/PROJECT:MATERIAL:
DRAWNELENA09/11/2014
8'' SIGMA FILTER
CHECKED CAT. NO:
APPROVEDPART NAME/TITLE:
B.O.M.ASSEMBLY DRAWING DRW. NO:Rev.
Confidential property information.8'' SIGMA0
All Flanges According to DIN; BSTD; ANSI Amiad Water Systems Ltd.
reserves therights to make changes. SCALE: NOSIZE: A3SHEET 1 OF 1
All copy rights reserved toRef.8'' SIGMA FILTER FOR CUSTOMER
REV.DATED E S C RP II TO NN A M E Amiad Water Systems Ltd.Backup Drawing:
Sigma Pro 8” installation of 4 units with manifold,
for flow rates up to 1,120 m /h (4,932 gpm)
3
IN
DRAIN
OUT
Sigma Pro 6” installation of 2 units with manifold,
for flow rates up to 360 m /h (1,584 gpm)
3
DRAIN
IN
OUT
Technical Specifications
General dataSigma Pro 4”Sigma Pro 6” Sigma Pro 8”
Max. flow rate* (130µ)120 m /h (528 gpm)180 m /h (792 gpm)280 m /h (1,233 gpm)
3
3
3
in average water quality
Min. operating pressure 1.5 bar (22 psi) - electronic controller
when cleaning 2.2 bar (32 psi) - hydraulic controller
Max. operating pressure 10 bar (145 psi)
Filtration area6,000 cm(930 in )8,000 cm(1,240 in ) 8,000 cm(1,240 in )
2
2
2
2
2
2
Inlet/Outlet diameter4" (100 mm) Flange & Victaulic6” (150 mm) Flange 8” (200 mm) Flange
Empty: 75 kg (110 lb)Empty: 110 kg (242 lb)Empty: 120 kg (264 lb)
Weight
Full: 145 kg (213 lb) Full: 225 kg (496 lb) Full: 235 kg (518 lb)
* Maximum flow rates depends on water quality and micron size.
Hydraulic controller
Rinse controllerPP (Polypropylene), PA (Polyamide)
DP switchBuilt-in rinse controller set at 0.5 bar (7 psi)
Operation mode3-way ball valve, indicate: automatic or manual
Electronic controller
Control voltage 6 VDC or 110 or 220 VAC
Control power supply4 x D type 1.5V batteries or AC power
Solenoid operation data 9-12 VDC latching solenoid or 24 VAC solenoid
DP switchDry contact switch
Flushing data
Exhaust valve2" (50 mm)
Flushing time10 seconds
Reject water volume 75 liters (20 gallons)90 liters (23 gallons)90 liters (23 gallons)
per flush cycle
Flushing flow34 m /h (153 gpm) 36 m /h (161 gpm) 36 m /h (161 gpm)
3
3
3
(at 1.5 bar/22 psi)
Construction materials
Filter housing and lidRPP (reinforced polypropylene)
RPA (reinforced polyamide)
ScreensMolded weavewire, stainless steel 316L
Cleaning mechanismPBT (polybutylene)
Exhaust valve Polymeric
Seals EPDM
Control command tubing PE (polyethylene)
Standard Filtration Degrees
micron 500 300 200130 10080
mm 0.5 0.3 0.20.13 0.10.08
8" Sigma Pro packaging information:
205 x 75 x 100 cm
150 kg
