Hydraulic fluids from press systems in the steel, aluminium, wood and plastic industry are often contaminated with fine particles of the material used in forming, such as buffing paste, or the raw material, such as wood. In spite of ventilation filters and main and secondary flow filters, impurities may enter the oil and lead to abrasion of valves, causing internal leakage.
The oil temperature increases. The oil ages faster as a result. The hydraulic oil, which is contaminated, oxidised, or simply does not have enough additives, may ultimately lead to the forming press coming to a standstill.
Regular oil analyses every 2,000 hours allow the condition of the machine and oil to be monitored and avoid such breakdowns.