Introduction
In today's industrial landscape, efficient water filtration is critical for operational reliability, cost savings, and environmental compliance. Lefilter specializes in manufacturing high-performance shallow sand filters that deliver superior filtration efficiency, durability, and ease of maintenance. With years of engineering expertise, our systems are trusted across industries for their consistent performance, compact design, and smart automation.
This article explores the technology, benefits, applications, and technical specifications of our shallow sand filters, demonstrating why they are the preferred choice for water treatment professionals worldwide.
How it works
Shallow sand filters operate on a multi-stage filtration process, ensuring optimal water clarity with minimal maintenance.
1. Inlet Distribution – Water enters through a diffuser system, evenly dispersing across the sand bed.
2. Depth Filtration – As water percolates through graded silica sand (0.4–1.2 mm), suspended solids, organic matter, and fine particles are trapped.
3. Clean Water Collection – Filtered water exits through a precision underdrain system.
4. Automatic Backwashing – When pressure builds, the system reverses flow to flush trapped impurities, restoring filtration efficiency without manual intervention.
Our filters support manual, semi-automatic, or fully automated operation, making them adaptable to various industrial needs.
Advantages
1. Unmatched Filtration Efficiency
Removes particles as small as 10–50 microns
Handles turbidity levels up to 50 NTU
Consistent flow rates from 10–500 m³/h (customizable)
2. Durable & Corrosion-Resistant Construction
FRP (Fiberglass Reinforced Plastic) tanks – Lightweight, rust-proof, and UV-stabilized
Stainless steel options (304/316L) – Ideal for harsh chemical environments
Epoxy-coated carbon steel – For high-pressure industrial applications
3. Low Operational Costs
Energy-efficient backwash – Uses 30% less water than conventional systems
Minimal maintenance – No chemical additives required
Long media lifespan – Sand lasts 5–8 years with proper care
4. Smart Automation & Monitoring
IoT-enabled controls – Remote monitoring via cloud-based platforms
Pressure sensors & alarms – Prevent system overloads
Adaptive backwash cycles – Optimize water and energy use
Applications
Our shallow sand filters are deployed across multiple sectors:
✅ Municipal Water Treatment – Pre-filtration for drinking water and wastewater reuse
✅ Food & Beverage Processing – Ensures hygienic water for production lines
✅ Power Plants & Cooling Towers – Prevents scaling and fouling in heat exchangers
✅ Aquaculture & Fish Farming – Maintains optimal water quality for aquatic life
✅ Agriculture & Irrigation – Protects drip systems from clogging
✅ Chemical & Pharmaceutical Manufacturing – Meets strict purity standards
Why Choose Us
1. Higher Efficiency – Removes finer particles than rapid sand filters
2. Lower Maintenance – No frequent media replacements like cartridge filters
3. More Affordable – Lower lifecycle costs than membrane systems
4. Scalable Solutions – Modular designs for small to large-scale operations
5. Global Certifications – CE, ISO 9001, NSF standards compliance
