Pressure Sand Filter

Pressure sand filter

We are manufacturer, exporter and supplier of pressure filter, pressure sand filter, pressure sand water filters, sand filters are typically operated with a feed pressure of 2 to 5 bar (28 to 70 psi(a)). The pressure drop across a clean sand bed is usually very low. It builds as particulate solids are captured on the bed. The suspended solids are captured by the sand bed in a pressure sand filter as they are unable to pass through sand bed. Clear water passes through the bed easily. Gradually a layer of suspended particles begins to build up on the sand bed. This layer begins to resist incoming water passage and back pressure builds up. The build-up of particulate solids causes an increase in the pressure lost across the bed for a given flow rate. For a gravity fed bed when the pressure available is constant, the flow rate will fall. When the pressure loss or flow is unacceptable the bed is back washed to remove the accumulated particles. For a pressurised rapid sand bed filter this occurs when the pressure drop is around 0.5 bar. The back wash fluid is pumped backwards through the bed until it is fluidised and has expanded by up to about 30% (the sand grains start to mix and as they rub together they drive off the particulate solids). The smaller particulate solids are washed away with the back wash fluid and captured usually in a settling tank.

Akar manufactures different types of pressure filters. They are Sand Bed Filters, Activated carbon Filters, Mixed Bed Filters, Dual Media Filters etc. The filters supplied have different configurations. firstly the filters are equipped with Multi port valves or multiple valves. Filters also have different types of shapes. They are made with dished ends at both ends, dished end at the top etc. 

Akar manufactures the filters in a wide variety of sizes. From a small size to a large size.  Given above is a filter with multiport valve.