Hydraulic fluids formulated with DYNAVIS® technology are designed to perform consistently and reliably within a wide range of temperatures, from cold to hot - and they outperform all conventional hydraulic fluids. The DYNAVIS® formulation ensures that hydraulic fluids exhibit lower viscosity* at cold temperatures - and deliver stay-in-grade viscosity performance when operating hot. And the benefits to the equipment owner and operator are significant.
* viscosity = measure of resistance to flow
Hydraulic fluids in a cold start
If viscosity is too high in the start-up of hydraulic equipment, more power is required by the pump to move the fluid. Even in cold temperatures, DYNAVIS® formulated fluids demonstrate superior performance. Here's how: In a comparison of conventional hydraulic fluids to DYNAVIS® formulated fluids, DYNAVIS® formulated fluids demonstrated an ability to effectively and economically "start" at lower operating temperatures than the conventional fluids. Less power is required to move the pump, thereby saving fuel.
Another benefit is reduced "wear and tear" on all hydraulic components, as the normally extreme friction of cold conventional hydraulic fluids is absent in the presence of the DYNAVIS® formulated fluid.
DYNAVIS® formulated fluids resist the effects of heat accumulation. Why is this important?
When a hydraulic fluid becomes hot, it reaches a state in which some of the fluid is able to escape the "push" of the vanes or pistons of the hydraulic pump. Rather than being pumped, this fluid recirculates. This condition is called "internal leakage" and the result is a decrease in pump performance, or power. When internal leakage occurs, the pump operator tries to compensate for the lost power by stepping on the gas pedal, or increasing fuel consumption (also known as "afternoon slump").
Unfortunately, this tends to make matters worse, as the additional friction of the oil forced through the pump's narrow sealing gaps causes the fluid to become even hotter. The hydraulic system's performance continues to deteriorate into a vicious cycle of increased recirculation and higher operating temperatures - until the fluid is so overheated that vapor locks develop, and the entire hydraulic system comes to a halt.