| 摘要 |
PURPOSE: A double spring spray valve for an apparatus for deaerating feed water of a boiler is provided to improve the deaeration rate of dissolved gas in feed water by injecting feed water in a membrane shape equalized in thickness. CONSTITUTION: A double spring spray valve(15) for an apparatus for deaerating feed water of a boiler includes a body(1) inserted into an exhaust hole of a header, forming a feed water inlet(1a) following the circumference of the upper part and a feed water outlet(1b) at the lower part; a shaft(2) inserted into a through hole movably formed in the upper center of the body by interposing a bush(7); an outer spring(4) inserted into the upper part of the shaft for elastically supporting the upper end of the shaft to the body; an inner spring(5) inserted into the lower part for elastically supporting the shaft to the bush; and a spindle(6) coupled with the lower end of the shaft to open and close the feed water outlet, thereby injecting feed water flew into the body toward the lower part in a shape of membrane.
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