... 2application: HFO/LO/DO 3.remove water and impurities 4.automatic control the process (1)DA-XXX-S/O is a dual ... two centrifugal machines ,filters,stainless steel palte heaters,auto temperature control executor,triple valves,oil feed pumps,sludge oil pumps,solenoid ... to make all move and operation realize auto control,including auto start,auto increase temperature,auto oil inlet, auto water seal,auto ...