Why the Fisher Positioner Still Rules the Field
If you've spent any time at all on a plant floor, you know that a fisher positioner is pretty much the gold standard for getting a control valve to behave itself. It isn't just some accessory you bolt on and forget about; it's the actual brains of the operation that ensures your flow, pressure, or temperature hits the exact setpoint your controller is asking for. Without a solid positioner, even the most expensive valve in the world is basically just a heavy piece of pipe. ...