Hebei Hankai hydraulic dust seal

High pressure hydraulic shaft seals are prevalent in numerous applications, including

- Rod Seals Located on the rod of the cylinder, these seals prevent fluid from leaking out as the rod extends and retracts. Proper rod seals ensure that the cylinder maintains its performance over time.

A hydraulic motor oil seal is a mechanical device that prevents the leakage of hydraulic fluid in hydraulic systems. It acts as a barrier between different parts of the hydraulic motor, ensuring that the fluid remains contained within the system, while also preventing contaminants from entering. These seals are essential for maintaining the pressure and performance of hydraulic systems.

This article discusses the discovery of phosphorescent lithopone on watercolor drawings by American artist John La Farge dated between 1890 and 1905 and the history of lithopone in the pigment industry in the late 19th and early 20th centuries. Despite having many desirable qualities for use in white watercolor or oil paints, the development of lithopone as an artists’ pigment was hampered by its tendency to darken in sunlight. Its availability to, and adoption by, artists remain unclear, as colormen's trade catalogs were generally not explicit in describing white pigments as containing lithopone. Further, lithopone may be mistaken for lead white during visual examination and its short-lived phosphorescence can be easily missed by the uninformed observer. Phosphorescent lithopone has been documented on only one other work-to-date: a watercolor by Van Gogh. In addition to the history of lithopone's manufacture, the article details the mechanism for its phosphorescence and its identification aided by Raman spectroscopy and spectrofluorimetry.

When manufacturers add titanium dioxide to foods and other ingestible products, it’s typically referred to as E171, which relates to food-grade purity.