Plug valve

1. A valve with a closing element that may be cylindrical, conical or a spherical segment in shape that is opened or closed with rotary motion. 2. A type of shutoff valve consisting of a tapered rod with a lateral hole through it. As the rod is rotated 90° about its longitudinal axis, the hole is first aligned with the direction of flow through the valve and then aligned crosswise, interrupting the flow.

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