Low Pressure

Using compressed air to regenerate filter media between 30 and 60 psig [3-5 bar] is a common way to keep differential pressure low across the dust collector. 

The pulse valves and blowpipes are typically 2" to 3" in diameter. In the long blast of compressed air [300 ms], the flow of air through the filter media is reversed and the dust cake is gently pushed away from the filter media surface.

By using lower pressure, there is no violent shock of the filter media. The pressure required to clean the filter bags is 100-150% of the static pressure inside the system.  Dumping a high volume of lower pressure compressed air requires a large header and few restriction to flow.