Refined Fuels Refined fuels would include petroleum based fuel oils and some Jet Fuels. Their viscosity and temperature handled can vary greatly. Normally these are handled in bulk transfer operations. 4195 Cast iron Pressures up to 250 PSI Capacities to 580 GPM SG Ductile Iron Pressures >200 PSI Capacities to 190 GPM 475 Cast Iron Compact installation Pressure up to 100 PSI Capacities to 30 GPM