auto drain valves that helps in purifying the air by getting it rid of the pollutants. The electronic type automatic drain valve is offered variable cycle time and fixed valve opening time 4 seconds with 12" to 2" BSP connections. these air drain valves can be used in diverse industries and are competitively priced. These auto drain valves find extensive application in CNC machine shop,sugar mills, paper mills, rice mills, and food processing units.