Grease filtering apparatus

An oil filtering machine for use in combination with a deep fryer unit having an upwardly opening cooking vessel containing a supply of hot cooking oil, said machine includes a filter unit comprising a vertically extending tank and a filter panel in the tank spaced above the bottom thereof, a liquid circulating system including a motor driven pump with an inlet and an outlet, an oil inlet system including an elongate oil conducting first suction line with an upstream end extending to and communicating with the cooking vessel, an elongate oil conducting second suction line with an upstream end communicating with the tank below the filter panel, adjustable first valve means connected with and between the inlet of the pump and the downstream ends of said first and second suction lines and operating to proportionally vary the flow rate and volume of oil moving from the vessel and tank through the suction lines to the pump, an oil outlet system including an elongate oil conducting first delivery line with a downstream end extending to and communicating with the cooking vessel and an elongate oil conducting second delivery line with a downstream end communicating with the tank above the filter panel, an adjustable second valve means connected with and between the outlet of the pump and the upstream ends of said first and second delivery lines and operating to proportionally vary the flow rate and volume of oil moving from the pump through the delivery lines and to said vessel and tank.