The more fluid that recirculates, the higher the temperatures become within the system because of the additional frictional heat that's created. The fluid recirculates, creating what's known as "internal leakage". High temperatures "thin out" hydraulic fluid's viscosity, leaving the vanes or pistons of the hydraulic pump unable to push an adequate amount of fluid. WHEN THE ‘HEAT IS ON’, CONVENTIONAL FLUIDS LOSE THEIR ‘PUNCH’ In every climate zone in the world - from temperatures below freezing, to scorching heat - multiple operating shifts, any machine operator, and excavators of all sizes and conditions, DYNAVIS formulated hydraulic fluids guarantee maximum productivity, significant fuel savings, and reliable, sustained performance. Proving the superiority of DYNAVIS has been evident, both in a controlled environment and on-site at real working construction sites. Since 2005, Evonik has tested hundreds of hydraulic fluids, varying viscosity index and shear stability, in a range of mobile construction equipment. Construction machinery is often pushed to its limits.
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