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https://sameershahss.tumblr.com/post/649871377752555520/what-is-a-needle-valve-and-its-applications
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A needle valve is used to allow relatively subtle changes in fluid flow. The long, tapered, needle-like point on the end of the valve stem distinguishes a needle valve. The needle's more extended portion is narrower than the orifice in the valve seat and goes through it until the needle seats. Tag - needle valve, pressure relief valve manufacturers in india



