Principle and structure of gravity (valveless fine filter) swimming pool water treatment equipment equipment [Overview] Gravity (valveless fine filter) swimming pool water treatment equipment: no large valves, positive head filtration, washing automation, low cost and convenient operation and management, etc., are widely used in surface water purification, water purification landscape, river water purification, groundwater in addition to iron and manganese side, waterworks, industrial circulating water flow filtration, wastewater except suspended impurities, organic wastewater by biological treatment and secondary sedimentation tank after treatment and subsequent filtration indoor swimming pool water filtration, and other industrial, agricultural water purification. At present, the company developed the design and manufacture of "Hairun Germany" type valveless fine filter is based on many years of successful operating experience and user feedback, combined with a variety of water features, and fluid control theory, constantly updated sound, successfully developed out . UPVC material as the device itself using equipment package material, anti-corrosion, anti-aging, equipment warranty over 40 years. Since then abandoned the cumbersome and easily corroded metal and short-lived variety of glass fiber reinforced plastic material. "Hairun Germany" type valveless fine filter in the first of its kind nationally and internationally, making the process leading up to international level, hydraulic fluid control more intelligent automation and rationalization. Device configuration according to the different requirements of the user design and manufacture of single tank, double tank modular, three cans of modular, four cans modular and multi-tank modular. My company has a number of independent innovation intellectual property rights. [Equipment] principle runoff entering the tank with a uniform distribution, and then through the air isolation device into the filter, the filter from top to bottom. Since the filter layer continuously entrapped suspended solids in water, resistance of the filter layer is gradually increased, so that siphon the water level rises, the water level rises to the set position when entering the secondary siphon tube evacuation device, since the hydraulic action of the air inside the siphon away the formation of negative pressure. When the negative pressure reaches the design value, then the siphon phenomenon, when the water tank is formed back, below the filter layer from the bottom up and continue washing, the filter layer to obtain "regeneration." Due to the continuous backwash filter layer, backwash effluent discharged to the sewer pipe, the water level in the tank drops to a predetermined value, the siphon effect is broken, the end of the backwash, the filter starts working again.