How does a constant level oiler work supplying a pump system via a gravity fed reservoir? How does the pump maintain a constant level of oil in its reservoir? Is it because when its full it has a pressure exterted which the gravity fed oiler cannot overcome.
A typical pump has a certain flow rate at which it operates comfortably
A constant level gravity fed oiler typically supplies a drip feeder,
i.e. flow rates well below the comfortable operating band of the pump.
The pump therefore supplies more oil than is needed to the reservoir of the constant level oiler
but the reservoir has on overflow (at a certain level) so the excess can bypass the drip feeder
and take a short-cut back to the pump.