The main filter product names of China Strainer Network include:Al-alloy Shell Strainer,Antifouling cut off valve,Automatic Back Wash Strainer,Companding Pull-Rod Y Type Strainer,Compressed Air High-efficiency Strainer.

1. What is a BMF Shallow Medium Filter? 

A BMF Shallow Medium Filter is a high-speed pressure filtration system that utilizes refined quartz sand as its primary media. Unlike traditional deep-bed filters, the BMF system features a unique spherical tank design and high-efficiency internal distributors.

This design allows for a much higher filtration velocity (30–45 m/h) within a smaller volume, effectively removing suspended solids (TSS), organic matter, and colloidal particles from industrial water sources.

 

2. How It Works: The Filtration and Backwash Cycle 

The BMF system operates in two distinct phases, usually managed by an automated controller:

2.1 The Filtration Process 

Raw water enters through the inlet manifold and is distributed evenly across the sand bed. As the water percolates through the fine quartz sand, impurities are trapped within the media pores. The clean, filtered water is then collected by "mushroom" diffusers at the bottom and discharged through the outlet.

2.2 The Automatic Backwash Cycle 

As debris accumulates, the pressure differential ($\Delta P$) increases. Once it reaches a set point (typically 0.05–0.07 MPa), the system triggers the backwash mode:

The system backwashes one tank at a time.

Filtered water from the other active tanks is diverted to flush the dirty sand bed in reverse.

The sand is fluidized, debris is washed away into the drain, and the process completes in just 90–120 seconds without stopping the overall system flow.

 

3. Key Advantages of BMF Sand Filters 

Space-Saving Modular Design: The compact footprint saves over 40% of floor space compared to conventional filters, significantly lowering civil engineering costs.

Continuous Uninterrupted Supply: Since tanks are backwashed individually, the system provides a 24/7 continuous flow of filtered water.

Water and Energy Efficiency: The short backwash cycle consumes only 1%–3% of the total treated water, making it a highly sustainable choice.

Corrosion Resistance & Longevity: Tanks are typically constructed from high-grade carbon steel with rubber lining or stainless steel, ensuring a long service life in harsh industrial environments.

4. Primary Applications

Industrial Cooling Water: Removing airborne debris and scale-induced solids from cooling tower loops.

RO & UF Pre-treatment: Protecting membrane systems from fouling and clogging.

Irrigation & Landscaping: Filtering river or lake water to protect spray nozzles and maintain water clarity.

 

 

Wastewater Reuse: Polishing treated effluent for greywater recycling.

 

5. Conclusion

Integrating a BMF Shallow Medium Filter into your water circuit ensures system stability and protects downstream equipment. Its automation and efficiency make it an essential component of modern smart manufacturing and sustainable water management.

 

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