Trim
Trim turns up in 2 fields: valves, woodworking. Here is what it means to the people in each one.
Trim in valves
The replaceable internal parts of a valve that touch the process fluid, such as seat, disc or plug, stem and cage.
Trim is everything inside that controls and seals the flow, as opposed to the pressure-containing body and bonnet. Material choice is driven by erosion, corrosion and galling: gate and globe valves carry API trim numbers such as Trim 8, which pairs a 13 percent chromium stem with hardfaced seats, while control valves get hardened or staged trims for severe pressure drops. Changing the trim can resize a control valve without touching the body.
"Valve's in fine shape, it just needs reduced trim, we can't control at 8 percent open all day."
Trim in woodworking
To cut away a small amount of material from a workpiece to achieve a tight fit.
Trimming is the final adjustment made to a piece of wood, often removing just a shaving or a fraction of an inch to perfect a joint or align an edge. Carpenters trim components using a block plane, chisel, or saw to ensure everything sits flush and tight. This fine-tuning eliminates gaps and corrects minor variations in the framing or millwork.
"Just trim a hair off the bottom of that casing so it sits flat on the floor."