Plant Services - August 2008 - (Page 41) Reliability Lubrication Because varnish is a polar material, it’s attracted to metal surfaces such as servo valves. Neither approach is particularly economical. The ideal solution is to use hydraulic fluids that don’t deposit varnish on metallic surfaces. The additive packages in such fluids react with varnish precursors, thus minimizing the formation of tenacious, hard films on system hardware (Figure 2). Laboratory testing confirms the keep-clean feature of fluids using this technology. In industry-accepted pump tests, most additive technologies exhibit varnish formation within 500 hours of operation. In the same pump tests, fluids containing varnish-reducing additive technology showed no evidence of varnish formation after 1,000 hours of operation. Fluids containing the newer additives are particularly suited to applications in which high temperatures compromise oil life. This includes mobile equipment, plastic injection-molding machines, glass transfer systems, heavy presses and the like. These fluids also are suitable for plants that need to extend oil and equipment life, including valves, filters and pumps. Hydraulic fluids are being subjected to increasingly tough operating conditions. Demands that raise production while reducing oil volume emphasize the need for high-quality hydraulic fluids. A varnish-reducing additive chemistry is the perfect partner for hydraulic fluids used in those harsher operating conditions. Rob Profilet is commerical manager for Industrial Hydraulic and Gear Oil Additives for The Lubrizol Corp., Wickliffe, Ohio. Contact him at robert.profilet@lubrizol.com and (440) 943-4200. More resources at www.PlantServices.com Hydraulic PdM - “Hands-on hydraulics” Filtration - “Clean up hydraulic circuits” Hydraulic RCM - “The smart way to troubleshoot hydraulics” Hydraulic cleanliness - “Hydraulic maintenance” Hydraulics - “Forces to be reckoned” For more, search www.PlantServices.com using the keywords additive, hydraulic and varnish. DEMAND DELTECH! FLOWS TO 20,000 SCFM PRESSURES TO 1,000 PSIG DEW POINTS TO -100°F FILTRATION TO 0.0008 PPM W/W WORLDWIDE DISTRIBUTION INCREASE PRODUCTIVITY. Dependable Deltech compressed air dryers and filters deliver rugged durability to maximize productivity. Deltech can protect your products from being ruined by acidic, oily condensed water and help eliminate product rejects and machine downtime, which can destroy profits and cost you customers. Deltech products have been engineered for reliability and performance since 1961. Increase Productivity. DEMAND DELTECH! Telephone: 724.745.8647 Fax: 724.745.4967 Email: deltech.inquiry@airtreatment.spx.com www.deltech-spx.com August 2008 www.PLANTSERVICES.com 41 http://www.PlantServices.com http://www.PlantServices.com http://www.deltech-spx.com http://www.deltech-spx.com http://www.PLANTSERVICES.com
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