valve may be used with any number of other systems as well fig2 5 which are described in detail hereinafter show several preferred methods for cycling and thereby cleaning the valve assembly however it should be appreciated that any method wherein the valve is cycled may be implemented for this purpose fig2 shows a method of the present invention wherein the valve 10 is completely de stroked and stroked multiple times to clean the valve assembly 8 more precisely fig2 is a graph of valve position versus time as the valve 10 is completely de stroked from the on position to the off position and thereafter completely stroked from the off position to the on position the speed and duration of the method of fig2 are pre defined according to the needs of a particular application and may be programmed into the programmable controller 22 fig3 shows a method of the present invention wherein the valve 10 is shaken by a high frequency dither that has a duration long enough to physically move the valve assembly 8 a slight amount more precisely fig3 is a graph of valve position versus time as the valve 10 is rapidly cycled back and forth between the on position and an intermediate valve position the frequency of the signal is preferably based on the natural frequency of the valve fig4 shows a method of the present invention wherein the valve is partially de stroked several times more precisely fig4 is a graph of valve position versus time as the valve 10 is cycled back and.