What is the NPSH required for the GPF1091PC pump to prevent cavitation?
A: The manufacturer does not provide any information relating to the suction limitations other than:
FILTRATION: 25 micron or better OIL VISCOSITY: 6 - 200 cSt
INLET PRESSURE: 12 - 32 psi absolute OIL TEMP: -25° - 80°C (-12° - 175°F)
AMBIENT TEMP: -22° - 55°C (-8° - 130°F)
As always, ideal conditions for hydraulic pumps are ones that provide a flooded inlet with a large enough conductor to ensure adequate supply in operation. Filter condition indicator gauges for use on suction filters start their 'warning' zone at 9" of mercury, with the red zone beginning at 11" of mercury.