Valveless filter is a water treatment equipment that operates fully automatically based on the siphon principle, mainly used to remove suspended solids, colloids and other impurities in water. Its core feature is to automatically complete the filtration and backwashing process through hydraulic action, without the need for traditional valve control or external power intervention.
1、 Working principle
Filtering stage: The raw water is evenly distributed to the filter layer (such as quartz sand and anthracite) through the inlet distribution device. After filtering from top to bottom, the clean water enters the collection chamber and is stored in the flushing water tank through a connecting pipe.
Backwash trigger: With the accumulation of impurities in the filter layer, the resistance increases, causing the water level in the siphon rising pipe to rise to the auxiliary pipe opening, triggering the siphon effect. The water in the flushing tank backwashs the filter material in reverse, and the impurities are discharged through the siphon.
Restoration of filtration: When the water level drops to the siphon failure port, air enters the pipeline to terminate the siphon, and the system automatically restores the filtration state.
2、 Technical advantages
High degree of automation: No need for manual operation of valves, reducing maintenance costs.
Energy saving and efficient: Backwashing only relies on hydraulic power, with low energy consumption.
Structural stability: No mechanical valve design reduces failure points.
Compact and flexible: With a small footprint, it is suitable for space constrained scenarios.
3、 Typical applications
Municipal water supply: Pre treated raw water, turbidity can be reduced from 20NTU to below 5NTU.
Industrial circulating water: Side filtration treatment in petroleum, chemical and other fields to extend equipment life.
Rural drinking water: Used in integrated water purification equipment for purifying mountain spring water and well water.
Wastewater treatment: removal of suspended solids or deep filtration after biochemical treatment.