A needle valve having a soft tip adapted for sealing an annular valve seat of a body port. The soft tip may be defined as two dissimilar circular rod sections of ductile plastic with the larger diameter having a conical taper. The soft tip is pressed into a mating hole in the metal portion of stem up to its annular seat.Check Valves A thin metal tubular section of the metal stem is cold formed over the soft tip to retain it in place. The metal retainer secures the soft tip in the axial direction and limits the radial expansion of the soft tip while it is cold formed over the annular valve seat of the body port. Needle ValvesThe metal retainer also limits the axial movement of the stem to its maximum operating position. Under high axial forces, the soft tip does not rotate relative to the valve seat. GLOBE VALVEA resilient high-pressure seal is achieved with this arrangement. In a valve including a metal valve body that defines a flow chamber having a port with an annular seat and a metal valve stem having a central axis and rotatable within said metal valve body movably mounted in relation to said metal valve body for moving a soft tip towards and outwardly from said annular seat, an improvement for sealing an annulus between said metal valve body and said soft tip, said improvement comprising: (a) a conical shaped soft tip having a tip diameter smaller than said annular seat and a maximum diameter larger than said annular seat; (b) cylindrical mounting means on said metal valve stem of said conical shaped soft tip with an inwardly facing annular shoulder and a hole to align said conical shaped soft tip coaxially to said metal valve stem and said annular seat; and (c) retaining means on said metal valve stem of said conical shaped soft tip consisting of a thin tubular section greater than the diameter of said conical shaped soft tip for effectively retaining said conical shaped soft tip as it is moved toward and outwardly from said annular seat during each successive forcing of said conical shaped soft tip against said annular seat as said conical shaped soft tip is cold formed to the shape of said annular seat; wherein said retaining means limits the inward movement of said conical shaped soft tip towards said annular seat; said retaining means acts as a secondary metal to metal seal; said retaining means extends beyond said annular shoulder of said metal valve stem to be effectively cold formed in the desired conical shape thereby capturing said conical shaped soft tip; said retaining means limits the radial expansion of said conical shaped soft tip; said retaining means allows rotation of said conical shaped soft tip with respect to said metal valve stem: and during high axial force contact with said annular seat, said conical shaped soft tip does not rotate relative to said annular seat.

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