Semi-Automatic Screen Filter – Hand-Operated Mesh Filter for Agricultural Irrigation

This innovative design eliminates the need for disassembly during routine cleaning, saving time and labor while maintaining filtration performance. Available in 2" and 3" sizes with flow rates up to 50 m³/h, these filters are ideal for greenhouse irrigation, small to medium farms, and applications where manual cleaning is preferred. The durable construction and easy operation make them a practical choice for growers seeking reliable filtration with minimal complexity.

Product Advantage

Here are the key advantages of our semi-automatic screen filter:

• Clean Without Disassembly

Unlike standard Y-filters or T-filters that must be removed from the system for cleaning, our hand-operated filter can be cleaned by simply turning the shaking handle. The internal cleaning mechanism scrubs the screen surface while the filter remains in place, significantly reducing maintenance time and effort.

• Large Filtration Area

The filter incorporates an oversized screen element that provides exceptional dirt-holding capacity. This large filtration area maintains low pressure drop even with moderate sediment loads, extending intervals between cleaning operations and improving system efficiency.

• Strong Filtering Effect

The precision-woven stainless steel mesh captures suspended particles effectively, protecting downstream drip emitters, sprinklers, and valves from clogging. Available in various mesh sizes to match specific water quality requirements.

• Easy to Operate

The simple hand-operated mechanism requires no tools or special training. A few turns of the handle when pressure drop increases restores the filter to clean condition, making maintenance accessible to all farm workers.

• Durable Construction

Manufactured from high-quality engineering plastics and corrosion-resistant materials, the filter body withstands agricultural chemicals, UV exposure, and mechanical stress. The robust design ensures long service life in demanding field conditions.

• Versatile Connection Options

Available with bayonet or threaded connections to suit different installation requirements. The modular design allows easy integration into existing irrigation systems.

Technical Parameters

Below are the detailed technical specifications for our semi-automatic screen filter.

Table 1: Model Specifications

Table 2: Dimensional Specifications (mm)

Table 3: General Specifications

Table 4: Available Accessories

Customization Available

Product Uses

Our semi-automatic screen filter serves essential functions across multiple applications:

• Greenhouse Irrigation

Ideal for greenhouse operations where regular filter maintenance is required. The hand-operated cleaning mechanism allows workers to quickly clean filters without tools or disassembly, minimizing downtime.

• Small to Medium Farms

Perfect for farms where automated systems may not be justified. Provides reliable protection for drip and sprinkler systems with simple, low-cost maintenance.

• Nursery Operations

Suitable for nurseries with container plants requiring clean water for micro-irrigation. The large filtration area handles varying water quality effectively.

• Field Crop Irrigation

For row crops irrigated with drip tape or sprinklers, these filters provide essential protection at an economical cost.

• Landscape Irrigation

Ideal for parks, gardens, and landscaping projects where maintenance staff can easily access and clean filters during routine rounds.

• Backup Filtration

Can be installed as backup filters in systems where automatic filters are primary, providing redundancy during maintenance or power outages.

Product Operation Guide

• Installation Steps:

1. Location: Install after the pump and before downstream irrigation equipment. Ensure adequate space around the filter for handle operation and maintenance access.

2. Positioning: Mount the filter in a accessible location where the shaking handle can be easily turned.

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. Pressure Gauge: Install pressure gauges before and after the filter to monitor pressure differential and determine when cleaning is needed.

5. Drain Valve: If equipped, connect the drain valve to a suitable drainage point for system flushing.

6. System Check: Slowly pressurize the system and check all connections for leaks.

• Operation:

1. Normal Filtration: Water flows through the filter, with the mesh screen capturing suspended particles. Monitor pressure gauges regularly.

2. When to Clean: Clean the filter when pressure differential increases by 0.5-1.0 bar from clean condition, or at regular intervals based on water quality.

3. Cleaning Procedure:

  - No need to shut down the system or remove the filter

  - Simply turn the shaking handle several rotations

  - The internal mechanism scrubs the screen surface, releasing trapped particles

  - Flushed particles exit through the bottom drain (if equipped) or settle in the sump

  - Continue turning until resistance decreases, indicating clean screen

4. Completion: After cleaning, resume normal operation. Pressure differential should return to normal levels.

• Maintenance:

1. Regular Inspection:

  - Check pressure differential readings weekly

  - Inspect for leaks at connections

  - Ensure handle operates smoothly

2. Periodic Cleaning:

  - For heavy sediment loads, the filter may occasionally need disassembly for thorough cleaning

  - Remove the filter element and rinse with clean water

  - Inspect screen for damage, replace if necessary

  - Check seals and O-rings, replace if worn

3. Seasonal Maintenance:

  - Before winter, drain filter completely to prevent freezing damage

  - Remove and clean screen element thoroughly

  - Store in dry place if system will be inactive

Troubleshooting

FAQ

Q1: How does the hand-operated cleaning work?

A1: The filter contains an internal cleaning mechanism connected to the external handle. When you turn the handle, the mechanism scrubs the screen surface, releasing trapped particles without removing the filter from the system.

Q2: Do I need to shut down the system to clean the filter?

A2: No, the filter can be cleaned while water continues to flow through the system. Simply turn the handle several times – no shutdown or disassembly required.

Q3: How often should I clean the filter?

A3: Cleaning frequency depends on water quality. Monitor pressure differential – when it increases by 0.5-1.0 bar from clean condition, it's time to clean. This could be daily, weekly, or monthly depending on conditions.

Q4: What flow rates are available?

A4: 2" models handle up to 30 m³/h; 3" models handle up to 50 m³/h. Choose based on your system flow requirements.

Q5: What filtration grades are available?

A5: Various mesh sizes are available upon request – from coarse (80 mesh) to fine (200 mesh). Contact our sales team with your requirements.

Q6: Can I get replacement screen elements?

A6: Yes, replacement screen elements are available for all models. Contact our sales team with your filter model number.

Q7: What is the difference between S and L models?

A7: S and L indicate different dimensional configurations – both offer the same flow capacity but with different body lengths to suit various installation space requirements.

Q8: Are these filters UV resistant for outdoor use?

A8: Yes, the engineering plastic housing contains UV stabilizers and is suitable for outdoor agricultural applications.

Q9: Can I use this filter with well water containing sand?

A9: Yes, these filters are suitable for well water with sand content. The large filtration area handles sediment well, and the hand-operated cleaning makes maintenance simple.

Q10: What accessories are available?

A10: Available accessories include drain valves, pressure gauges, pressure warning valves, replacement screen elements, and mounting flanges.