The National Fluid Power Association (USA) has collected the hydraulic
fluid viscosity recommendations for specific pumps and motors from the
major pump OEM's in NFPA Recommended Practice T2.13.13-2002. The following
calculators allow you to select a specific pump and input the temperature
operating conditions in your equipment. The proper fluid viscosity grade
is then displayed based on the OEM's fluid viscosity recommendations. You
may choose to view the fluid viscosity grade in NFPA or ISO standard
format. You may also choose to identify a single fluid grade that is
suitable to meet the OEM viscosity requirements of multiple pumps.

One Pump, NFPA viscosity grade

One Pump, ISO viscosity grade

Multiple Pumps, NFPA viscosity grade

Multiple Pumps, ISO viscosity grade

Energy Savings Calculator • NFPA Viscosity Grade Selection Tool • Hydraulic Fluid TOW Calculator