DFN duplex operating pressures up to 888 psi / 63 bar and flow rates up to 58 gpm / 184 lpm with DFE rated glass media element options and higher with wire mesh media.  DFN allows for element servicing without interrupting must have continuous hydraulic & lube system operation.  Ideal for 24x7 critical systems such as turbine seal oil, boiler feed pumps, FD-ID fan lube oil and more.  Upgrade antiquated Auto-Kleen filters to DFN