Circulating Lubrication Systems

Circulating oil systems are the most versatile type of lubrication system available. They are often used on large expensive bearings, or when it is absolutely essential to provide continuous operation under adverse conditions.

A typical pump dispenser which provides a continuous flow of oil to the bearings is shown.  By proper direction of oil flow, this system can be used for heavily loaded bearings operating at high speeds and temperatures.  This type of system is good in extremely dirty and corrosive atmospheres. The oil is normally returned to the pump dispenser by gravity.  Adequately sized return lines are necessary with vents to provide a free flow of return oil back to the reservoir.  Any restricted flow at this point could cause high oil level in the bearing housing, creating heat, and damaging the bearings. Flow sights are often used to monitor the return oil flow.  There are also a wide variety of sight valves and control valves available to adjust and regulate the oil flow into the bearing.

Several of the common options available for the pump dispensers are dual pumps for a back up system, dual filters available in micron ratings down to 5 microns, heat exchanger, either air cooled or water cooled, permitting heat removal rates extending into the hundreds of thousands of BTU/HR. Heaters can also be provided to maintain a certain oil temperature, and can be utilized for cold weather start ups.  Pressure regulating devices, along with pressure switches, low level switches, and filter condition alarms are also available.

These systems can be specifically designed and engineered to actual customer needs.