High capacity solids-ejecting centrifuge for the animal and fish processing industries AFPX 617 Alfa Laval AFPX separator centrifuges were specially designed for extremely demanding separation jobs. Key features of the AFPX 617 centrifuge are its ability to handle high flow rates, high solids content and high-temperature processing. These functions make it the ideal choice to handle the tough conditions encountered in the animal and fish processing industries. In addition, the AFPX 617 centrifuge combines a high Gforce, high sludge capabilities and automated operation. The centrifuge bowl is made of Super Duplex stainless steel, which makes it possible to combine extremely high erosion resistance with a very high bowl speed for demanding separation duties. Applications The AFPX 617 is designed for intermittent discharge of solids, while separating two intermixed and mutually insoluble liquid phases of different densities. In different optimized executions it is used for a large number of duties, from handling separation of fish press liquid, stick water and extracts, and on the other hand purification of fish oil and liver oil, animals fats, peel oil and similar products. Performance The actual throughputs depend on variables such as the amount and type of solids, the temperature, viscosity and degree of separation required. The following figures indicate the rate of performance, although no guarantees are given. Alfa Laval representatives will be pleased to provide you with further information. AFPX 617 complete with motor Separation - fish press water 28.000–40.000 l/h (120–180 US gpm) Purification - fish oil 18.000–23.000 l/h (80–100 US gpm) Purification - animal fat 7.000–10.000 l/h (30–45 US gpm) Standard design The machine consists of a frame that has a horizontal drive shaft with clutch and brake, worm gear, lubricating oil bath and vertical bowl spindle in the lower part. The bowl is mounted on top of the spindle, inside the space formed by the upper part of the frame, the ring solids cover, the collecting cover, and the frame hood. The feed and liquid discharge system, including the paring disc pump for the heavy phase, also rests on this structure. All parts in contact with the process liquid are made of stainless steel. The bowl is of the solids-ejecting disc type with a hydraulic operating system for “shooting” (for automatic or manual operation). The electric motor is of the variable frequency drive type or of controlledtorque type. Optional extras Starter equipment, frequency converter, discharge control panel, standard set of fittings, set of CIP valves and fittings, and serviceability package for online viewing of separator status. Material data Bowl body, hood and lock ring s.s. 1.4501 UNS S32760 Solids cover and frame hood s.s. 1.4401 UNS 31600 Frame bottom part grey cast iron, clad with s.s. 1.4301 UNS 30400 In and outlet parts s.s. mostly 1.4401 UNS 31600 Gaskets and O-rings Nitrile rubber Basic equipment Concentrator or purifier parts, inlet and outlet devices, revolution counter, set of erosion-protective parts, illuminated sight glass box for light phase outlet, vibration switch, vibration-isolating base plate, flange motor, set of tools and standard set of spares.

Operating principles Separation takes place inside a rotating bowl. The feed is introduced to the rotating centrifuge bowl from the top via a stationary inlet pipe (1), and is accelerated in the distributor (2), which was specially designed to ensure smooth acceleration of the feed liquid (4). Leaving the distributor, the feed enters the disc stack (3). The separation into liquid–liquid– solids takes place between the discs, with the oil phase moving through the disc stack to the centre. When it reaches the centre, it is discharged through holes (5) and ejected into the collecting frame. The...