... appearance, small occupation, durable Technical Parameters of small cold oil press machinery: Model Number1685, 1688, 120, 150Screw Diameter78mm, ... a formal contractOil Hydraulic Press and small cold oil press machinery: Centrifugal refining machineRefining machine functionsFiltration equipmentOil ... 4. Without the filter cloth, not loss of oil, no wearing consumable parts, diesel automatic separation.4 ...