The diaphragm valve consists of two air chambers divided by a piece of diaphragm. The two chambers are connected through an air passage (air passage's diameter is smaller than the orifice of the pilot valve). When the orifice opens, the air in the upper chamber is exhausted much faster than the speed of air that enters through the air passage. The air pressure of the upper chamber drops significantly, the higher pressure of the lower chamber pushes the diaphragm up and opens a bigger passage for air to enter into the bottom chamber. This sudden burst of air is used to inflate the fabric filter so as to shake off all the dust clinging on the outside of your bag filter.
Aplus Finetek Sensor Inc., Walnut, CA 909-598-2488 www.aplusfine.com
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