Piston Air Compressor Oil

Piston compressors increase pressure very quickly by reducing the volume of their chambers. Air or gas is compressed and displaced by a rising and falling piston in a hermetically sealed cylinder. Compression and pumping of the medium occurs as a result of a periodic (oscillatory) change in pressure. Each stage is controlled by inlet and outlet valves. The compressor is cooled either by air circulating through fins attached to the cylinder head or by water circulating through a jacket around the cylinder.

In piston compressors, the piston is connected to the crankshaft by a connecting rod. As a rule, the cylinder and the movement mechanism are lubricated by spraying oil from the same crankcase. In large compressors, the piston is driven by crosshead connecting rods (single or double acting crosshead compressors). In such compressors, the movement mechanism is lubricated by spraying oil from the crankcase and separately from the cylinders.