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Description
This automatic self-cleaning screen filter system is a filtration solution designed for agricultural irrigation applications that require protection against suspended solids. The system uses a dual-stage filtration design with coarse and fine screens, removing particles from water sources. It operates without interrupting downstream flow during cleaning cycles, making it suitable for operations that require consistent water delivery.
Technical Parameters
Filter Model | DFS-S02 | DFS-S03 | DFS-S04 |
Size | 2" | 3" | 4" |
Max. Flow Rate (130μ) | 30 m³/h (132 gpm) | 50 m³/h (220 gpm) | 80 m³/h (352 gpm) |
Min. Operation Pressure (when cleaning) | 1.5 bar (22 psi) | 1.5 bar (22 psi) | 1.5 bar (22 psi) |
Max. Operation Pressure | 8 bar (116 psi) | 8 bar (116 psi) | 8 bar (116 psi) |
Filtration Area | 1,200 cm² (186 in²) | 1,600 cm² (248 in²) | 2,400 cm² (372 in²) |
Inlet/Outlet Diameter | 2" (50 mm) bayonet | 3" (80 mm) bayonet | 4" (100 mm) flange |
Weight (Empty) | 16 kg (35 lb) | 20 kg (44 lb) | 23 kg (51 lb) |
Component | Function |
Coarse Screen | Pre-filtration to remove large particles before entering fine screen |
Fine Screen | Primary filtration element for final particle removal |
Hydraulic Turbine | Powers the suction-scanner shaft using water flow |
Suction-Scanner Shaft | Rotating shaft that moves spirally along screen surface |
Suction-Scanner Nozzles | Create negative pressure to absorb trapped impurities |
Controller | Monitors pressure differential and initiates cleaning cycles |
Drain Valve | Controls discharge of flushed impurities |
Sewage Outlet | Connection point for waste water discharge |
Air Release Valve | Automatically releases trapped air from system |
Mesh Size | Micron Equivalent | Typical Application |
80 mesh | -200 micron | Sprinkler systems, coarse filtration |
120 mesh | -130 micron | Standard drip irrigation |
150 mesh | -100 micron | Fine filtration, pressure-compensating drippers |
200 mesh | -75 micron | High-precision filtration |
Custom Option | Details |
Flow rates | Custom configurations available for higher flow requirements |
Filtration grades | Various mesh sizes available upon request |
Connection types | Threaded, bayonet, or flanged options |
Material options | Alternative materials for special applications |
Product Features
Unlike manual filters that require offline cleaning, this system maintains filtration throughout the entire cleaning process. The suction-scanning mechanism removes accumulated particles while water continues to flow through the system, eliminating the need to stop irrigation operations.
The system incorporates two screens operating in sequence. Raw water first passes through the coarse screen to remove larger particles, then enters the fine screen for final filtration. This two-stage approach extends cleaning intervals, protects the fine screen from damage by large debris, and improves overall filtration efficiency.
The cleaning system is powered entirely by water flow, with no external electrical power required for the mechanical components. A hydraulic turbine drives the suction-scanner shaft, which moves spirally along the inner surface of the fine screen. The suction-scanner nozzles create negative pressure that lifts trapped particles from the screen and flushes them through the drain valve to the sewage outlet.
The cleaning cycle uses less water and energy compared to traditional backwash systems. The targeted suction-scanner design cleans only the areas where particles have accumulated, reducing water waste during the cleaning process.
The system features a space-efficient design that simplifies installation in equipment rooms, pump stations, and field locations. Its modular construction allows configuration to match specific site requirements while minimizing space usage.
The filter system is manufactured from engineering plastics and corrosion-resistant materials, constructed to withstand agricultural environments. It operates with minimal routine maintenance requirements when used with various water sources.
Product Uses
This filter system serves functions across multiple applications: large agricultural irrigation projects, greenhouse complexes, golf course and landscape irrigation, surface water intake from rivers, canals and reservoirs, pre-filtration for industrial water treatment, and remote installations where manual cleaning is impractical.
Install the filter after the pump and before downstream irrigation equipment, ensuring adequate space for maintenance access
Mount the filter in the correct orientation, with the drain valve and controller accessible
Connect inlet and outlet according to flow direction arrows marked on the filter body, ensuring all connections are sealed
Connect the drain valve to a suitable drainage point with no restrictions or back-pressure
Mount the controller in an accessible location and connect pressure sensors before and after the filter
Install the air release valve at the highest point of the system
Slowly pressurize the system and check all connections for leaks, then verify controller operation
Weekly: Check pressure differential readings, inspect controller for error messages, verify drain line flow, and check for leaks
Monthly: Test manual cleaning function, inspect pressure sensor connections, clean controller exterior, and verify drain valve operation
Annual: Inspect screens for wear or damage, clean screens if biological fouling is present, check and replace seals and O-rings as needed, verify all sensor and valve operations, and check controller settings
FAQ
Raw water enters through the inlet, passes through coarse and fine screens for filtration. When the pressure differential between inlet and outlet reaches the preset value, the controller opens the drain valve. A hydraulic turbine drives the suction-scanner shaft that moves spirally along the inner screen surface. The suction-scanner nozzles create negative pressure that absorbs trapped impurities and flushes them to drain, all while the filter continues operating.
Suction-scanning technology cleans only the areas where particles have accumulated, using targeted negative pressure to remove debris. This uses less water than traditional backwash systems that flush the entire screen, and it allows continuous filtration during the cleaning cycle.
The cleaning mechanism is hydraulically powered by water flow and requires no external electricity. The controller may require power from a battery or low-voltage source depending on the model specified.
Standard models offer flow rates of 30 m³/h (2"), 50 m³/h (3"), and 80 m³/h (4"). Standard filtration grades include 80 mesh (-200 micron), 120 mesh (-130 micron), 150 mesh (-100 micron), and 200 mesh (-75 micron). Custom configurations for higher flow rates and other mesh sizes are available upon request.
The system requires regular inspection of pressure readings and visual checks. Annual maintenance includes screen inspection and cleaning if necessary. All components including screens, seals, controllers, and valves are available as spare parts. Contact our sales team with your filter model number for specific part requirements.
