Flow pulse valve injection into the injection tube at high speeds, when approaching the injection tube at the inlet of the fluid dynamic pressure maximum, minimum static pressure in the injection tube at the bottom of the fluid dynamic pressure dropped to zero, the maximum static pressure . Mainly by the hydrostatic pressure of fluid ejected from the nozzle into the bag. Various adjustments on the injection tube nozzle aperture size, is realized in different resistance, so that the fluid nozzle through various static pressure equal. Thus it ensures consistent cleaning effect of the bag at the same life. In dealing with the injection tube to the nozzle, and now most of the dust removal equipment and other manufacturers have adopted both the pore structure, fluid injection pressure at the nozzle opening is not all the same, so the bag by the impact vary widely, so it will lead to some bag load is too large, thereby shortening life. Some dust plant is the use of a nozzle aperture then subtraction method, which is also difficult to ensure that all the nozzle opening pressure at the injection nozzle is equal. Injection tube with an adjustable nozzle construction activities tested by the pressure sensors, transmitters, oscilloscopes repeated testing, so that when the cleaning fluid injection nozzle opening in such injection pressure substantially equal to ensure that when the injection fluid bag for all impact substantially equal equalize cleaning effect.

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