Backwash Filter

Our backwash filter is a high-performance automatic self-cleaning filtration unit, designed for stable, efficient fluid purification in industrial, commercial and agricultural settings. Adopting the reverse flushing principle, it automatically removes suspended solids, sediment, rust and other impurities from the filter element without disassembly or extended downtime. It maintains consistent filtration performance, cuts manual maintenance workload, and ensures uninterrupted operation of downstream pipelines and equipment. Featuring a sturdy build and flexible configurations, it meets diverse filtration needs for raw water, circulating water, municipal water, low-viscosity industrial liquids and irrigation water, serving as a cost-effective, reliable choice for long-term filtration management.

Key Technical Features

Automatic Backwashing System: Powered by an intelligent control module, it triggers backwashing via pressure difference or timer automatically, eliminating manual operation. The fast cleaning process finishes in seconds without disrupting normal filtration, enabling 24/7 uninterrupted work.

High-Precision Filtration Screen: Uses wedge-wire or stainless steel woven mesh elements with customizable precision (20-400μm) to match varied impurity removal needs. The screen offers high strength, good permeability and deformation resistance, trapping fine particles while keeping low flow resistance.

Corrosion-Resistant & Durable Materials: Housing and core parts adopt premium SS304/SS316L stainless steel, anti-corrosion carbon steel or duplex stainless steel, delivering excellent rust, corrosion and wear resistance. It adapts to harsh environments with a service life of over 10 years.

Low Pressure Loss Design: Optimized internal fluid channels minimize hydraulic resistance, reducing energy consumption and stabilizing system pressure. It is compatible with standard pipeline pressure (0.2-1.0Mpa) for easy installation and integration.

Flexible Control & Monitoring: Supports differential pressure, time and manual control modes, with optional pressure gauges and digital panels for real-time inlet/outlet pressure monitoring. Users can adjust parameters flexibly for on-site personalized operation.

Core Product Advantages

Cost-Effective Operation: Avoids frequent filter cartridge/media replacement, reduces manual cleaning labor costs and material waste, slashing long-term operating expenses compared to traditional filters.

Uninterrupted Production Protection: Online self-cleaning prevents downtime from filter maintenance, protecting downstream pumps, valves, heat exchangers and nozzles from clogging and damage, extending equipment life and boosting production efficiency.

Wide Adaptability: Compatible with clean water, circulating water, sewage, industrial process liquids and irrigation water, adapting to varied temperature and pressure environments. Customizable interface size, filtration precision and materials are available for diverse scenarios.

Eco-Friendly & Low-Carbon: Reusable filter element reduces solid waste from disposable filters, with low backwash water consumption, complying with global environmental and energy-saving standards.

Easy Installation & Maintenance: Compact structure fits existing pipelines without major modifications. Routine maintenance only requires regular checks of control parts and screens, with no complex disassembly needed.

Main Application Areas

Our backwash filter has wide applicability across multiple industries, solving core filtration pain points for global users:

Water Treatment Industry: Used for municipal tap water pretreatment, domestic sewage tertiary treatment, industrial wastewater purification and groundwater/river water filtration, easing the load of subsequent processes and improving effluent quality.

Industrial Circulating Water Systems: Filters impurities in cooling/heating circulating water and process water for metallurgy, power and petrochemical industries, preventing scaling and clogging of heat exchange equipment and pipelines to maintain high efficiency.

Agricultural Irrigation: Purifies river, well and reservoir water for farmland, greenhouse and garden irrigation, protecting drip/sprinkler/micro-irrigation equipment from blockage to ensure uniform irrigation and higher crop yields.

HVAC & Commercial Facilities: Applied to central air conditioning cooling water, building water supply and hotel swimming pool pretreatment, removing rust and sediment to ensure stable HVAC operation and safe water use.

Chemical & Pharmaceutical Industry: Filters raw material water, process liquids and recycled solvents, trapping impurities to stabilize production, improve product purity and meet industry hygiene standards.

Core Technical Parameters

Frequently Asked Questions (FAQ)

Q1: How often does the backwash filter perform backwashing?

A1: Backwashing frequency depends on inlet fluid impurity content. Normally, it activates automatically at 0.05-0.1Mpa pressure difference or 8-24 hour timer intervals. For high-impurity fluids, frequency rises automatically, and manual parameter adjustment is also available.

Q2: Is this filter suitable for corrosive fluids?

A2: Standard models fit neutral water and non-corrosive low-viscosity liquids. For corrosive fluids (acid/alkali, seawater), we offer SS316L/duplex stainless steel custom versions with corrosion-resistant seals for stable operation.

Q3: Will filtration stop during backwashing?

A3: No. This online self-cleaning filter only cleans part of the element per cycle, while the rest keeps filtering normally, ensuring uninterrupted fluid supply with no impact on downstream systems.

Q4: What routine maintenance does the filter need?

A4: Maintenance is simple: regularly check pressure gauges and control systems, inspect the screen every 3-6 months, and clean the sewage outlet. The element has a long lifespan and only needs replacement if damaged, no daily consumable changes required.

Q5: How to choose the right filtration precision?

A5: 50-100μm for general water purification; 100-200μm for irrigation/circulating water; 20-50μm for high-precision industrial use. We also provide tailored suggestions based on your fluid and application scenarios.

Scraper-Type Self-Cleaning Filter