[S6464]Parker Racor ELEMENT- REPLACEMENT- SPIN-ON
Nautilus Series fuel filter/water separators use a unique- patented coalescing Spin-On element that enhances centrifugal force thereby pulling 99% of the suspended free water from fuel. The Nautilus element- S6464- is self-cleaning and does not require replacement under normal operating conditions; it is not a particulate removing filter.
The 6400/6401 models feature an internal heat exchanger- which uses hot engine coolant to heat the incoming fuel. The fittings fit 5/8” I.D. coolant hoses and attach to the pressure side- up to 35 PSI (2.4 bar)- of the engine cooling system.
Additionally- the 6401 model also includes an internal coolant shutoff valve which is automatically controlled by a thermostat which opens at approximately 45oF (7.2oC) and closes at 100oF (37.7oC).
Heating the fuel dissolves paraffin wax crystals that form when diesel fuel is chilled thus enabling water separation to occur more efficiently and prevents downstream fuel filters from plugging with wax and/or ice crystals.
Nautilus assemblies are for PRIMARY filtration and separation use only. A secondary filter is required downstream. Model 6400 features a coolant heat exchanger as standard; a customer supplied shut-off valve may be required. Model 6401 features an internal automatic thermostat (shuts off coolant flow to heat exchanger to control fuel temperature).