Kalrez® Spectrum™ 7075 resists aggressive fluids at high temperatures and saves costs in clamping systems
Aggressive Hydraulic Fluids vs Kalrez®
A leading manufacturer of heavy duty clamping systems for metals, plastics and rubber processing switched to DuPont™ Kalrez® Spectrum™ 7075 perfluoroelastomer parts to seal its hydraulic clamp range, with the goal of ensuring long-term resistance to highly aggressive Oemeta HF/DU hydraulic fluids at 482°F.
Other sealing solutions used in the same environment had to be replaced due to failure after only a few months, while Kalrez® Spectrum™ 7075 seals from DuPont have been in place for well over a year and a half to-date without problems. Since refitting with Kalrez®, the company was able to significantly extend the service intervals of the pressure cylinders, resulting in cost savings and increased reliability of the clamping system. It also allowed the company to offer its customers new application areas.
Kalrez® 7075 for Hydraulic Clamping Systems
Heavy duty hydraulic clamping systems developed and manufactured by the customer are used to hold large hot dies in exact position on forging machines, and also to secure hot molds in injection molding equipment. The units are designed to handle pressures of up to 400 bar, and temperatures as high as 482°F. Any leakage of the hydraulic fluid from up to six pistons applying clamp forces of 25–1250 kN is unacceptable. The seals used in those systems have to offer resistance to highly aggressive Oemeta HF/DU hydraulic fluids at 482°F.
According to the customer, Oemeta HF/DU, an ester-based hydraulic fluid, contributed to the outstanding temperature performance and ensured low flammability of the pressure unit, while the superior heat and fluids resistance of Kalrez® Spectrum™ 7075 minimized the risk of premature seal failure, and significantly reduced costly down-time.
Kalrez® Spectrum™ 7075 for the Chemical Industry
Kalrez® Spectrum™ 7075 from DuPont is intended to set a new industry standard for severe chemical process industry (CPI) sealing applications. It offers even longer seal life than Kalrez® 4079, resulting from enhanced sealing force retention and higher thermal resistance up to 620°F. Kalrez® Spectrum™ 7075 also offers broader chemical resistance and better cool down set recovery than Kalrez® 4079. In combination, these improvements translate into reduced downtime, lower maintenance costs, increased MTBR and higher yields for customers.
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Gallagher Industrial Products is a tier 1 Kalrez distributor and can help with all your FFKM sealing needs. Contact us today to start a conversation.