The Auto Drain valve allows automatic discharge in a reliable manner and without any human intervention. Here, the condensate drips from above onto the protective cap, which is meant to prevent contamination or clogging of the valve or down the inside wall and then collect in the lower part of the bowl. With the help of automatic drainage process, the collection of condensate causes the float to lift and once the float has lifted enough, the valve actuation open the valve. During this operation the filter bowl is under pressure that penetrates through the valve into the inner pressure chamber of the automatic piston and therefore opening movement of the automatic piston, condensates is drained off. Our auto drain valve is highly dust and corrosion resistant with high durability.