A needle valve comprises a valve body including a conduit portion through which a flow passage is formed and a bonnet portion which screws into a cylindrical well formed in one side of the conduit portion to intersect the flow passage and form a valve chamber within the valve body. Forged Steel ValvesThe bonnet portion is bored through to support a valve stem upon which is mounted a frusto-conical member, the valve stem and the bore through the bonnet portion being threaded for movement of the frusto-conical member transversly across the flow passage via turning the valve stem. Needle ValvesA tubular liner, formed of a flexible material, extends around the periphery of the valve chamber and is split into two semi-cylindrical sections which receive the frusto-conical member and are spread thereby against portions of the valve chamber wall pierced by the flow passage as the frusto-conical member is seated in the liner.PLUG VALVES Tabs are formed on the bottoms of the liner to extend into a slot formed in the bottom of the valve chamber to prevent rotation of the liner without interfering with the spreading of the liner to seal the valve against flow through the flow passage. A self-piercing needle valve having a body and a shank is adapted for mounting upon a pipe. A valve support plate extends transversely of and is secured to said shank and has a right-angle extension at one end. Said extension along its length on one side has a series of variably spaced parallel wedge-shaped slots corresponding to different pipe diameters. The support plate is adapted to extend transversely of and bear against one side of a pipe. An anchor plate is spaced from and opposed to the support plate and adapted to bear against the opposite side of said pipe. A transverse slot through one end of the anchor plate is adapted to loosely receive said extension upon one side of the pipe, with portions of said anchor plate bounding said slot retainingly nested within one of said notches. A fastener upon the other side of the pipe extends between and interconnects the opposing ends of said plates for drawing the plates together and for gripping the pipe therebetween.

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