The shallow sand filter is a highly efficient water filtration system composed of one or more standard high-speed sand cylinder units. It features a unique internal water distribution and water collector system, along with an automatic flushing valve that enables individual backwashing of multiple cylinders during normal operation under fully automatic program control. **Advantages** The shallow sand filter offers several notable advantages. It has a small backwashing water consumption, making it eco-friendly and cost-effective. Installation is easy, and operation is straightforward, requiring no maintenance despite its large flow rate. There are two series available, vertical and horizontal, to meet different user requirements and suit various water quality treatment needs across different fields. **Product Features** - **Size Flexibility**: Filter units come in sizes ranging from 24" (500mm) to 96" (2400mm), providing options for different installation spaces and filtration needs. - **Versatile Installation**: Can be used as a standalone system with an existing process supply pump or as a bypass filter with its own pump. Multiple filters can also be installed on common pipework for unlimited filtration capacity. - **Backwashing Flexibility**: Backwashing can be manual, semi-automatic, or fully automatic, activated by a manual button, PLC, pressure differential, or management system. The backwash cycle and time are adjustable. - **High Filtration Speed**: Operates at a high filtration speed with low pressure loss, addressing common issues of slow filtration and small flow rates in mechanical media filters. - **Modular Setting**: Reduces footprint and piping work, saving investment. It cuts floor space by over 40% and piping work by over 50%. - **Material**: The shell and pipeline are made of carbon steel Q235B for durability or stainless steel for enhanced corrosion resistance. - **Imported Core Components**: High-quality core components from reputable manufacturers ensure excellent performance. - **Single Chamber Design**: Provides a better backwashing effect and a lower sand runoff rate. - **Durable Water Collector**: Available in stainless steel/ABS for longer life. - **Convenient Outlet Pipe**: Set at the bottom of the unit for less water resistance and easier maintenance.

**Working Principle** **Filtration Status** The shallow sand filter consists of multiple filtration units working in unison. During filtration, unfiltered water is evenly distributed through a unique water distributor. The water then flows in a laminar fashion through a filler layer of refined homogeneous quartz sand, trapping impurities. Several evenly distributed water collectors at the bottom uniformly collect and draw out the filtered water. This level flow filtration allows for high flow rates and excellent filtration results.

**Backwashing Status** As impurities accumulate in the packing layer, the internal pressure head loss increases. When it reaches a set value, the differential pressure device activates, switching the system to the backwashing state. A hydraulic valve changes the water supply direction for one-by-one backwashing, cleaning the accumulated impurities. Even during backwashing, filtration continues. While one standard unit sand cylinder is backwashing, the others keep filtering. The clean filtered water is partly used for backwashing, and the backwash effluent is expelled through the backwash drain. A special collector design maximizes backwashing efficiency and minimizes water consumption. Backwashing lasts for 3 minutes per standard unit sand cylinder. Once completed, the internal pressure head loss reduces, and the system returns to the filtration state. The system can also be controlled by time backwashing, defaulting to every 4 hours and adjustable according to site conditions. Dual system control operates based on which process is needed first. **Industrial Applications** The shallow sand filter plays a crucial role in industrial systems. It provides high-quality filtration, removing a wide range of impurities to ensure water purity for better product quality and process efficiency. Its high filtration speed can handle large volumes of water quickly, meeting the demands of industrial processes. With low maintenance requirements and efficient backwashing, it reduces costs and conserves water. The filter's versatility allows it to be used in various applications as a standalone system or integrated into larger water treatment setups. It also minimizes environmental impact by filtering water for reuse, reducing the need for fresh water and wastewater discharge. Constructed from robust materials, it is durable and can withstand harsh industrial environments. Additionally, it can be scaled up to handle higher flow rates, making it suitable for both small and large industrial systems.