There are particular units that will determine the flow of a lubricant . There are certain flow signals is found on either on the suction side or discharge side of the pump. Another name for this also can be flow meter, where you need to look. The header system has two groups, simple line or two line systems.
The picture will help you see how the lubrication goes thru the system. It will go from start to end. And this the liquid not the mist application.
If you have further question about how this process works, call us at 662-871-8403 or 800-361-0068
tupelohydraulics@gmail.com