APPARATUS FOR MACHINING A VALVE'S SEAT

摘要

Apparatus for machining a stop valve seat ring while the valve remains piped to a turbine comprises a pair of spiders with adjustable arms which fit within the valve and a shaft rotatably supported by the spiders and driven through a gear train by a motor attached to one of the spiders, the shaft having a tool support which holds and is capable of moving a single edge cutting tool axially to machine the seat ring.