?? Works under normal circumstances: ???? a water pumping from Jan to allocate water tank, water tank through the water and then by the distribution pipeline average assigned to two non-valve filter, the filter chamber quartz sand filtered water, After entering the cell body of water corridor, mixed disinfection dosing, the outlet flow into the clear pool. Abnormal conditions (backwash) works: ??? when silt and sediment filter chamber surface of thick sand layer, the flow through the influence, forcing the filter chamber water level gradually rose through the siphon tube fall, when the water level rose to the highest point (siphon elbow portion), the fast flowing water, a strong siphon action, so that the pool of water in through the bottom of the filter body back. So that the filter (quartz sand) flip, silt and sediment through a siphon into the trench. When the body of water in the pool ??? row to the set position (siphon bucket position), siphon siphon effect is destroyed by the filter capacity has been improved, filter resumes normal operation. ? Description: 1, the distribution tank: the storage and distribution of water effects, a set of two set up a non-valve filter. 2, watershed board: water flow can be evenly distributed to two non-valve filter. 3, adjustable diverter plate: slow down the flow of the impact of the media, so that water can be evenly scattered onto the filter. 4, siphon bucket: filter recoil when the water level drops below the body of the pool when the siphon bucket, siphon action inside the siphon is broken, the end of the recoil. 5, the water balance pipe: make two filter the water balance. 6, siphon closed tank: Closed siphon tube decline. 7, Buttress: Plates and media support. 8. Plates: There is a steel plastic filter cap (on steel perforated pipe welding DN20mm head, the filter cap). Useful angles and round welding system, filtration media supporting role. 9. Media: quartz sand on three separate three kinds of size, thickness of 1.38 m. 10, the water corridor: The water filter from the filter chamber, from the bottom of the supporting layer, the channel flow cell body. 11, the filter chamber: filled filter, closed water circulation through the water filter sand and then into the corridor. (Nap inside wall, so that the water can not flow away from between the walls and filter) 12, the cell body: store a certain amount of water, when the water reached the highest level, the inflow of water from the outlet pipe clean water tank. 13, the drain valve: emptying the pool water in the body, so clean, clear cell body than sand and silt, scale and so on.