Pre-filtration and Filtration of Drinking and Industrial Water

Automatic Hydraulic Self-Cleaning Screen Filters

 

 

SERIES AF-200

 

 

Standard Features:

• Minimum operating pressure: 2.5 bar
• Maximum operating pressure: 10 bar
• Clean filter pressure loss: 0.1 bar
• Maximum water temperature: 65°C
• Filtration range: 50 - 3000 micron
• Control voltage: 9V DC, 12V DC, 24V AC
• Flush water consumption [at minimum working pressure]: 15 liter
• Filter housing materials: carbon steel coated with baked on epoxy

 

 

Model	Conn. Size ØD [inch]	Screen Area [cm²]	* Maximum Flow Rate  [m³/h]	** Flushing Flow Rate [m³/h]	ØD1   [inch]	X   [mm]	Y   [mm]	H   [mm]	Weight   [kg]
AF-202F	2	1100	30	6	10	220	197	542	41
AF-202FS	2	1630	30	6	10	220	197	665	46
AF-203F	3	1100	40	6	10	220	197	525	44
AF-203FS	3	1630	50	6	10	220	210	660	48
AF-204F	4	1630	80	6	10	220	210	660	47
AF-204FS	4	2770	90	6	10	220	315	940	70
AF-206F	6	4120	130	8	10	220	400	1170	90
AF-208F	8	5240	200	8	16	305	450	1250	160
S	Filter with large filtration area
*	Flow rate data is for high quality water at filtration grade of 120 micron
**	Flushing flow rate data is for minimum operational pressure [2.5 bar]

 

Pressure Loss at 120 Micron

  

Operation Information for AF-200 Series Hydraulic Self-Cleaning Filter[ wmv 1.6 MB ]

 

Filtration

Water enters the filter through the “Inlet” [9]. The water then reaches the fine screen [11], which purifies the flow by separating smaller particles from the water. As more water flows through, impurities build up on the fine screen.

As impurities on the screen accumulate, a pressure imbalance is built up between the internal section of the fine screen [11] and its external section.

 

Cleaning Process 

When the difference in pressure [ΔP] reaches the preset value on the electronic control unit [4], a series of events is triggered while water continues to flow to the system units. The flushing valve [12] opens, pressure is released from the hydraulic piston [1], and water flows outside. Pressure in the hydraulic motor chamber [2] and the dirt collector [8] is significantly lowered, and the dirt collector nozzles [7] begin a suction process. The water flows through the hydraulic motor [6], which rotates the dirt collector [8] around its axis. The pressure released from the piston and the high pressure inside the filter, cause linear movement of the dirt collector. The combination of the linear movement and rotation significantly cleans the whole internal screen surface. The flushing cycle takes 5 seconds. The flushing valve [12] closes at the end of the cycle and the increased water pressure returns the system to its initial position. The filter is now ready for the next cycle, with clean and filtered water flowing through the “Outlet” [10].

 

General Description of the Electronic Control System

The electrical system controls the cleaning process through the differential pressure indicator [5] that closes a circuit and triggers the electronic control unit [4] that controls the opening and the closing of the flushing valve [12] via the solenoid valve [3]. The flushing cycle, which takes a total of 5 seconds, resumes its operation whenever the difference in pressure reaches the preset pressure value set on the differential pressure indicator.  If the difference in pressure remains unchanged after one cycle, another cycle will start after a delay of 25 seconds.

 

 

Legend: Hydraulic Piston Hydraulic Motor Chamber Solenoid Valve Electric Control Unit Differential Pressure Indicator Hydraulic Motor Suction Nozzle Dirt Collector Inlet Outlet Fine Screen Hydraulic Flushing Valve

 

 

Installation possibilities
Filter installation on a pipe		Installation of more filters on a parallel pipeline
Filter Contaminated water inflow Filtered water outflow Shut-off flap valve for by-pass Shut-off flap valve on the inflow Shut-off flap valve on the outflow Space for disassembly		Filter Contaminated water inflow Filtered water outflow Waste Shut-off flap valve on the inflow Shut-off flap valve on the outflow Space for disassembly

 

 

 

 

SERIES AF-800

 

 

Standard Features:

• Minimum operating pressure: 2.5 bar
• Maximum operating pressure: 10 bar
• Clean filter pressure loss: 0.1 bar
• Maximum water temperature: 65°C
• Filtration range: 10 - 3000 micron
• Control voltage: 9V DC, 12V DC, 24V AC
• Flush water consumption [at minimum working pressure]: 80 liter
• Filter housing materials: carbon steel coated with baked on epoxy

 

 

Model	Conn.Size ØD [inch]	Screen Area [cm²]	*Maximum Flow Rate  [m³/h]	**Flushing Flow Rate [m³/h]	ØD1   [inch]	ØD2   [inch]	L   [mm]	L1   [mm]	L2   [mm]	L3   [mm]	H   [mm]	Weight   [kg]
AF-803LOPR	3	3220	50	25	10	4	450	1160	1389	2015	545	85
AF-804LOPR	4	5780	80	25	10	4	900	1550	1800	2770	545	110
AF-806LOPR	6	5780	150	25	12	4	900	1620	1855	2900	580	135
AF-806XLP	6	8410	160	25	10	4	900	2020	2250	3700	555	175
AF-808PR	8	5780	160	25	12	4	900	1810	2045	3070	580	160
AF-808LOPR	8	8410	300	25	12	4	900	2210	2443	3865	580	183
AF-810PR	10	8000	350	50	16	4	1100	1980	2480	3265	720	280
AF-810LOPR	10	8410	400	25	14	4	900	2210	2445	3860	595	225
AF-810XLP	10	11710	450	75	16	4	1100	2700	3145	5365	720	340
AF-812PR	12	11710	600	75	16	4	1100	2710	3155	5365	720	350
AF-814PR	14	12990	900	75	18	4	1270	2710	3155	5365	770	420
AF-816PR	16	12990	1100	75	18	4	1270	2710	3155	5365	770	470
AF-816XLP	16	17020	1500	75	24	4	1270	2710	3155	5365	920	700
XLP	Extra long filter with extra large filtration area
LO	Long filter with large filtration area
PR	Parallel connection standard
*	Flow rate data is for high quality water at filtration grade of 120 micron
**	Flushing flow rate data is for minimum operational pressure [2.5 bar]

 

Pressure Loss at 120 Micron

  

Operation Information for AF-800 Series Hydraulic Self-Cleaning Filter[ wmv 2.2 MB ]

 

Filtration

Water enters the filter through the “Inlet” [12] and passes through the coarse screen [13] that functions as a “first stop” for rough particles. Water then reaches the fine screen [9], which further purifies the flow by separating smaller particles from the water.  As more water flows through, impurities build up on the fine screen.  As impurities on the screen accumulate, a pressure imbalance is built up between the internal section of the fine screen [3] and its external section.

 

Cleaning Process 

When the difference in pressure [ΔP] reaches the preset value in the electronic control unit [2], a series of events is triggered while the water continues to flow to the user. The flushing valve [5] opens, pressure is released from the hydraulic piston [6] and water flows outside. Pressure in the hydraulic motor chamber [7] and the dirt collector [11] is significantly lowered, and the dirt collector nozzles [4] begin a suction process. The water flows through the hydraulic motor [8] which rotates the dirt collector [8] around its axis. The pressure released from the piston [6] and the high pressure inside the filter cause linear movement of the dirt collector. The combination of the linear movement and rotation significantly cleans the entire internal screen [9] surface.

The flushing cycle takes about 10 seconds. The flushing valve [5] closes at the end of the cycle and the increased water pressure returns the hydraulic piston [6] to its initial position.  The filter is now ready for the next flushing cycle, with clean and filtered water flowing through the “Outlet” [10].

 

Note: At the back of the piston is an indicator that pops up when the piston reaches the end of its motion. This indicator helps us to check whether the dirt collector, inside the filter, completed it’s motion.

 

General Description of the Electronic Control System

The electronic system [2] initiates the cleaning process based on either time differential [DT] and / or pressure indicator differential. The trigger closes a circuit and then triggers the electronic control unit after a delay of 15 seconds. The electronic control unit [2] controls the opening and the closing of the flushing valves [5] via the solenoid valve [1]. The flushing cycle, which takes a total of about 10 seconds (can be adjusted by the operator), resumes its operation whenever the time cycle ends or the difference in pressure reaches the preset pressure value set in the controller. If the difference in pressure remains unchanged after one cycle, another cycle will start after a delay of 15 seconds.

 

 

Legend: Solenoid Valve Electronic Control Unit Differential Pressure Indicator Suction Nozzle Hydraulic Flushing Valve Hydraulic Piston Flushing Chamber Hydraulic Motor Fine Screen Outlet Dirt Collector Inlet Coarse Screen

 

 

Installation possibilities
Filter installation on a pipe		Installation of more filters on a parallel pipeline
Filter Contaminated water inflow Filtered water outflow Shut-off flap valve for by-pass Shut-off flap valve on the inflow Shut-off flap valve on the outflow Space for disassembly		Filter Contaminated water inflow Filtered water outflow Waste Shut-off flap valve on the inflow Shut-off flap valve on the outflow Space for disassembly

 

 

 

Special Options and Features:

• High pressure range: 16, 25, 40[bar]
• High temperature range: withstands temperature up to 95°C
• Anti frost: special control system for cold climate conditions
• Electric current: 110V AC, 230V AC, single phase, 3-phase, 24V DC and solar energy
• Construction materials: stainless steel 304L or 316L, and titanium
• Available controllers: electronic, timer, air-actuated, computerized and custom designed

 

 

Although the filters are manufactured in a top technical and technological quality, their installation, operation and maintenance are very easy. They are intended for a continuous operation and are non-demanding in terms of both rinsing water consumption and consumption of energy.

 

 

If you require removal of any mechanical impurities from water, please contact us and we will draw up, free of charge, a proposal for the most suitable solution for you, on the basis of a raw water analysis, required filtration capacity [m³/hr] and required quality of output water.

 

 

High Quality Water No Matter Where It Comes From