Hydraulic fluids have four basic purposes. First, they create force and motion by taking pressure from one place and moving it flawlessly to another place. Second, the fluid acts as a kind of seal, helping to keep contaminants out of the system by virtue of filling...
In theory at least, vacuum pumps are ‘merely’ air compressors run backwards — with the inlet attached to a machine you want to apply vacuum to and the outlet open to the air. In fact, for smaller, at-home uses, an air compressor and a vacuum pump are literally the...