Brass Inline Easy Read Flow Control Valve, Female 3/8-18 NPT Ports, Up to 10.00 GPM & 2000.00 PSI

Once you dial it in, the setting holds. There's a set screw built into the design that lets you lock the adjustment in place after you've got the flow where you need it. So if you're running a repeatable process and can't have that number creeping on you, just snug down the set screw and it stays put. The metal knob and stem are also a lot more durable than plastic alternatives, which helps keep things stable under regular use.

The color coding and numerical readouts are there to give you positive, precise, and repeatable settings. You can adjust it accurately within a small fraction of a turn, about one full turn per color.

You can make adjustments while the system is pressurized. The valve is built to allow flow changes under live pressure, which is a real convenience when you need to dial in a setting without taking the line down. Once you land on the right setting, the locking set screw holds it in place so it doesn't drift.

For that kind of motion control, it’s built to meter flow in one direction and allow free flow in the opposite direction. That lets you slow the actuator on the controlled stroke, then get an unrestricted return.