J~S Machine & Valve, Inc. performs a wide array of documented valve modifications. Our scope of work includes... plus your next modification.

Trim Change, Bevel and worm gear installation, Actuator installation including electric, pneumatic, and hydraulic actuators. Flange Conversions of any type, Installation of packing and gaskets, Bypass Fabrication and engineering, NACE trim conversions, Stainless conversions on Twinseal, Plug conversions and grinding including lubricated and non-lubricated, PMI/Positive material Identification Testing, Hardness Testing including Rockwell and Brinnell, Stem Extensions, Stem Fabrication, Bore Changes including buildup and reductions, casting upgrades, magnetic particle testing, Dye Penetrant inspection, flange facing both straight through and 90 degree patterns, Live Load Packing, Pressure testing per API 598 and 6D this includes chart recorded testing that can range from 1 hour to 1 day. Trim Changes of all alloys, outside lever and weights, and many more