Tdw Delaware, Inc.

Daniel McCaskill

A service tee (T) of this disclosure includes a valve plug (V) having a plunger () connected to a threaded stem () extending from a bottom end () of a plug body (). Turning the threaded stem actuates the plunger, thereby advancing and retracting a seal () of the plunger to block or allow flow respectively. An anti-rotation stop () prevents the plunger from rotating as the threaded stem linearly displaces the plunger. A keyway or drive () for actuating the plunger remains recessed in the body of the plug so that prior art plug insertion tools can be used for plug installation. In some embodiments, the plug insertion tool may be a hot tapping machine. Once the plug has been set into a pressurized pipeline fitting, every leak path is sealed using non-metallic (e.g. elastomeric or polymer) sealing technology.

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Tulsa, OK, United States of America

Daniel McCaskill