Hydraulic Hand Pump

Hand-operated hydraulic pumps convert mechanical energy into hydraulic energy (a combination of pressure and flow) by delivering hydraulic fluid under pressure through directly applied manual effort. They use the simple principle of a handle providing leverage to an internal piston. The piston then forces hydraulic fluid into the cylinder port. Water and hydraulic oil are the most common fluids, but a variety of pressure media may be used. The hydraulic energy generated is used to supply pressure for testing, adjusting, and calibrating different types of measuring instruments. This differs from pneumatic hand pumps, which generate pressure using air, a very compressible gas, rather than an incompressible fluid medium.