Air-line-lubricators usually contain the following parts: the
head, an adjusting screw on the head, a bowl to contain the
lubricant, and often a bowl drain to allow removal of the
lubricating oil when needed.In the top of the head of typical
air-line-lubricators will be a small, transparent housing. This
housing will have an adjusting screw on the top. That adjusting
screw will increase or reduce the drops of lubricating oil that
are being drawn into the air stream by the passing of compressed
air through the lubricator head. The reason that the housing is
transparent is so that, as you adjust the flow of oil via the
flow-adjusting screw, you can count the drops as you do so. Note
that a lubricator head will usually have an arrow on it
displaying the required direction of air flow through the
lubricator, and you can see the one on the head of the
lubricator in the photo. In the lubricator head there are ports
to which the in and out air lines are attached. Some lubricator
manufacturers have line ports that ar