Specifications:
The document outlines specifications for modular automatic flushing gravel filters available in three tank sizes: 600mm, 900mm, and 1200mm. Each size has corresponding connection sizes of 2” VIC, 3” VIC, and 4” VIC, respectively. The gravel weight is made of steel, and the nozzle quantities are 20, 37, and 67 for each size.

Operation Data:
The maximum flow rates for the 600mm, 900mm, and 1200mm filters are 30 cm3/h, 55 cm3/h, and 100 cm3/h, respectively, with a maximum pressure of 10 bar. The gravel weights are 200 kg, 550 kg, and 800 kg.

Product Uses:
These filters are suitable for natural river water with sand, pond or reservoir water, and water with a large quantity of algae or rubbish.

Features:
The filters have a PVC body with an optional metal bottom sand chamber and an internal ceramic conical sleeve guaranteed for over three years. They support flow rates up to 50m3/h with a 3” inlet/outlet and up to 70m3/h with a 4” inlet/outlet. Connections include male thread, victaulic, and flange, and the system is uniformed for modular array with PN8. Custom client requests are possible.

Head Loss Chart and Material:
The modular 4” automatic flushing disc filter includes flange, vic, weld glue connections, and a sediment chamber made of PVC or steel welding. The sleeve is ceramic, and the body is PVC.

Additional Specifications:
The system can be combined with a 2” disc filter with 120 mesh, using a flange in the manifold. The manifold material is either welding steel or PVC injected.

Operation Data for Disc Filter:
Recommended flow rates range from 40 to 100 cm3/h for 2 to 5 units, with a maximum pressure of 8.0 bar and a minimum of 2.5 bar. The maximum temperature is 50℃.

Additional Features:
The modular system supports 2 to 6 units for flow rates of 40-120m3/h. It includes a standard manifold with steel or PVC injected, automatic backwashing disc filter for second-phase filtration, and sand drainage and disc washing managed by a DC/AC controller with DP. The system is easy to install, requires minimal seasonal care, is compact in size, and is patent pending.