Automatic Self-Cleaning Disc Filter – Intelligent Filtration for Agricultural Irrigation

The unique helical structure generates a centrifugal effect as water enters, causing high-speed rotation that separates heavier particles before they reach the disc stack—significantly reducing the frequency of backwash cycles . When pressure differential indicates accumulated solids, the automatic backwash mechanism activates without interrupting system flow, decompressing the disc stack and reversing water flow to flush captured particles to drain . Available in 2", 3", and 4" sizes with flow rates from 20 m³/h to 60 m³/h and filtration grades of 75-150 mesh, these filters provide reliable, low-maintenance protection for drip and sprinkler irrigation systems.

Product Advantage

Here are the key advantages of our automatic self-cleaning disc filter:

• Helical Centrifugal Design for Extended Filtration Cycles

The filter incorporates a patented helical flow deflector that creates a centrifugal effect as water enters . This spinning action throws heavier particles away from the disc stack, keeping them in suspension and preventing sudden clogging. This innovative design minimizes backwash frequency and reduces maintenance requirements compared to standard disc filters .

• Depth Filtration for Superior Particle Retention

Unlike screen filters that trap particles only on the surface, disc filters provide true three-dimensional depth filtration . The grooved disc surfaces create multiple layers of filtration paths, capturing particles throughout the entire disc stack. This design offers higher dirt-holding capacity and more consistent filtration performance, especially with organic contaminants like algae .

• Fully Automatic Self-Cleaning Operation

The filter continuously monitors pressure differential across the disc stack. When preset levels are reached, the backwash cycle automatically initiates without interrupting main system flow . During backwash, the disc stack decompresses and rotates while water flows in reverse, thoroughly flushing captured particles to drain. The entire process takes seconds and requires no operator intervention.

• Durable Engineering Plastic Construction

Manufactured from high-performance engineering plastics, the filter housing resists corrosion, impact, and UV degradation . Unlike metal filters that may rust or react with fertilizers, our plastic construction maintains integrity in aggressive agricultural environments and is compatible with common irrigation chemicals.

• Compact Modular Design

The filter features a space-efficient configuration ideal for equipment rooms, pump stations, and field installations with limited space . Multiple units can be configured in parallel for higher flow applications, providing flexibility to match exact system requirements.

• Versatile Filtration Grades

Available with multiple filtration grades (75 mesh, 120 mesh, 150 mesh), the filter can be optimized for different water sources and irrigation requirements . Disc stacks are easily interchangeable, allowing adaptation to changing water conditions without replacing the entire filter.

Technical Parameters

Below are the detailed technical specifications for our automatic self-cleaning disc filter.

Table 1: Model Specifications

Table 2: Filtration Performance by Disc Grade

Table 3: General Specifications

Table 4: Dimensions & Packaging

Note: Appearing dimensions refer to standard plastic filter appearance dimensions. Contact our sales team for detailed dimensional drawings.

Customization Available

Product Uses

Our automatic self-cleaning disc filter serves essential functions across multiple applications:

• Agricultural Irrigation Systems

Ideal as primary or secondary filtration for drip irrigation, sprinkler systems, and micro-irrigation. Effectively removes sand, algae, and organic debris that would otherwise clog emitters and affect irrigation uniformity .

• Greenhouse & Nursery Irrigation

Protects sensitive greenhouse irrigation systems from contamination. The depth filtration design is particularly effective against algae and organic matter common in greenhouse water sources .

• Surface Water Filtration

Perfect for irrigation systems drawing from rivers, reservoirs, canals, and ponds where water contains both inorganic (sand, sediment) and organic (algae, seeds) contaminants .

• Well Water with Light Sand

For groundwater sources containing light sand (<3 PPM), the filter provides reliable protection while the helical design minimizes backwash frequency .

• Landscape & Golf Course Irrigation

Ensures consistent operation of sprinkler systems in public spaces, parks, and golf courses where maintenance access may be limited. The self-cleaning function reduces service visits .

• Agricultural Processing

Suitable for pre-filtration in agricultural processing applications where water quality affects product quality or equipment performance.

• Remote Installation Sites

The automatic self-cleaning feature makes these filters ideal for remote locations where manual cleaning is impractical or impossible .

Product Operation Guide

• Installation Steps:

1. Location: Install after the pump and primary pressure regulation, before downstream irrigation equipment. Ensure adequate space around the filter for maintenance access.

2. Positioning: Mount vertically on a stable foundation. The filter must be installed in the correct orientation as marked on the housing.

3. Connections: Connect inlet and outlet according to flow direction arrows on the filter body. Ensure all connections are properly sealed with PTFE tape on threaded connections.

4. Drain Line: Connect the backwash drain line to a suitable drainage point. Ensure drain line is adequately sized and has no restrictions that could impede backwash flow.

5. Control System: Connect the pressure differential controller and solenoid valves according to the wiring diagram. For 2" and 3" models, ensure minimum backwash pressure of 2.5 Kg/cm² is available.

6. System Check: After installation, slowly pressurize the system and check all connections for leaks.

• Operation:

1. Normal Filtration Mode: Water enters the filter tangentially, passing through the helical flow deflector which creates centrifugal force, throwing heavy particles away from the disc stack . Water then passes through the grooved discs where depth filtration removes remaining suspended solids.

2. Backwash Initiation: When pressure differential across the disc stack reaches the preset level (or timer interval is reached), the controller automatically initiates backwash .

3. Backwash Cycle: During backwash, flow direction reverses. The disc stack decompresses and rotates while clean water flows in reverse, flushing captured particles to drain . The cycle typically lasts 10-20 seconds.

4. Return to Filtration: After backwash completes, the system returns to normal filtration mode. Other filter banks continue filtering during backwash, ensuring uninterrupted water supply .

• Maintenance:

1. Regular Inspection:

  - Check pressure differential readings monthly

  - Inspect control system operation

  - Verify drain line is clear

  - Check for leaks at connections

2. Annual Maintenance:

  - Inspect disc stacks for wear or damage

  - Clean discs thoroughly if biological fouling present

  - Check seals and O-rings, replace if necessary

  - Verify controller and solenoid valve operation

3. Troubleshooting

FAQ

Q1: How does an automatic disc filter differ from a screen filter?

A1: Disc filters use stacked grooved discs that create three-dimensional depth filtration, trapping particles throughout the disc stack. Screen filters capture particles only on the surface. Disc filters offer higher dirt-holding capacity and better performance with organic contaminants like algae .

Q2: What is the advantage of the helical centrifugal design?

A2: The helical flow deflector creates a centrifugal effect that throws heavier particles away from the disc stack, keeping them in suspension and reducing the frequency of backwash cycles. This patented design extends filtration cycles and reduces maintenance requirements .

Q3: How often does the filter backwash?

A3: Backwash frequency depends entirely on water quality and flow rate. In clean water conditions, backwash may occur every few hours; in challenging water, every 15-30 minutes. The filter initiates backwash automatically when needed, so no manual scheduling is required.

Q4: Does the system stop filtering during backwash?

A4: In multi-filter configurations, only one filter bank backwashes at a time while the others continue filtering, ensuring uninterrupted water supply to the irrigation system .

Q5: What filtration grades are available?

A5: Standard grades are 75 mesh (~200 micron), 120 mesh (~130 micron), and 150 mesh (~100 micron). Other grades from 40-400 mesh are available upon request.

Q6: What is the minimum pressure required for backwash?

A6: The minimum backwash pressure is 2.5 Kg/cm² for all models. Ensure your system maintains at least this pressure during operation for proper self-cleaning function.

Q7: Can these filters handle water with high organic content?

A7: Yes, disc filters are particularly effective with organic contaminants like algae, seeds, and plant debris. The depth filtration design captures and retains organic matter effectively .

Q8: What maintenance is required?

A8: Regular maintenance includes periodic inspection of pressure readings and visual checks. Annual maintenance should include disc stack inspection and cleaning. The automatic self-cleaning function minimizes routine maintenance compared to manual filters .

Q9: Are replacement disc stacks available?

A9: Yes, replacement disc stacks are available for all models. Discs can be ordered in various filtration grades to match changing water conditions.

Q10: Can I use this filter with well water containing sand?

A10: Yes, these filters are suitable for well water with light sand content (<3 PPM). The helical design helps separate sand particles, reducing backwash frequency .