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Pressure not rpm will determine when the bypass will move to open or close itself.
The bypass will not open until the set pressure is exceeded. It will close once the pressure drops below the set pressure point no matter what the rpm is.
Correct, but pressure rises with RPM on a positive displacement pump. The bypass does close once the pressure drops, but so long as the pump is spinning fast enough to produce more pressure than the bypass is set for, the bypass will remain open. The further rpm/pressure increases after hitting the bypass stage, the more oil will flow through the bypass.
