Читать книгу Hydraulic Fluid Power - Andrea Vacca - Страница 25

In certain applications there is an increasing preference for using fluids that are environmentally friendly. In particular, a significant effort has been put in developing fluids that are highly biodegradable.

Synthetic fluids HPG (polyol esters) and HE (esters) and vegetable oils HTG (from sunflower and kale) belong to this category.