5-Axis CNC Machined 316 Stainless Steel Valve Body

Valve bodies start from bar or plate and are roughed while leaving stock for stress relief. 5-axis positioning drills angled ports so they intersect where the drawing says, rather than relying on separate fixtures that stack up error. Port bores and seats are finish-bored and, when needed, reamed. Internal intersections are deburred with back-chamfer tools and inspected with a borescope so no burr can break loose in service.

316 stainless contains molybdenum and resists chlorides, making it the standard for seawater, chemical and food-process valves; 304 is cheaper and fine for water and air. Both work-harden, so we keep tools sharp and feeds constant. Bodies are typically passivated to restore the chromium oxide layer after machining, then polished or bead-blasted. Powder coating is used only on external, non-sealing surfaces.

First articles get a CMM report on port positions and seat geometry, plus surface roughness checks on sealing faces. Threads are gauged and critical dimensions inspected on every unit. Material certificates for 304/316 are supplied on request, and pressure testing can be arranged to your procedure. Typical uses include ball and needle valve bodies, hydraulic manifolds, sampling blocks and marine fittings.