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This article presents information on the sight feed valves from Manitowoc, Wisconsin-based Oil-Rite Corp. These sight feed valves are suitable for pressure or gravity lubricating systems, where small quantities of liquid are to be drop fed. The sight feed valves are applicable to a variety of industries, such as chemical, mining, paper, agricultural, marine, woodworking, and textile. The valves are used to lubricate typical equipment like pumps, compressors, machine tools, bearings, seals, punch presses, and roller chains. These valves are suitable for operation on pressure, gravity, or vacuum service.

It looks like water, feels like water and puts out fires, but that's where the similarity ends. Tyco Safety Products of Marinette, Wisconsin, says the fluid used in its Sapphire Fire Suppression System won't harm rare artifacts or delicate electronics that water will damage. Books and paper marked with water-soluble inks were undamaged after immersion. The fire-fighting fluid is clear, colorless, odorless and leaves no residue. It complies with a National Fire Protection Association standard for clean agent fire protection systems.