Re-lubrication metering devices

On SKF MonoFlex single-line metering devices designed as re-lubrication metering devices, the quantity of lubricant is fed to the lubrication point only during or after pressure relief in the main line, i.e., after the lubrication unit is switched off.

After the lubrication unit is switched on, the lubricant is drawn out of the lubricant reservoir by the lubricant pump and fed through the main line to the relubrication metering device via the pressure relief valve and the pressure regulating valve. The pressure built up in the centralized lubrication system causes the collar (shuttle valve) to close the outlet to the lubrication point, which feeds the lubricant into the storage chamber. The lubricant below the spring-loaded metering piston is stored (fig.1).

After the lubrication unit is turned off, pressure in the lubrication system is relieved, which relieves pressure in the main line. The lubricant under preload below the springloaded metering piston now pushes the collar back toward the main line (fig.2).

This closes the main line and opens the outlet to the lubrication point. The lubricant can now be metered from the storage chamber and delivered to the lubrication point (relubrication effect). After the lubricant has been completely expelled to the lubrication point, the relubrication metering device is ready for the next lubrication cycle (fig.3).

In the table you can find the technical details of single-line metering devices as re-lubrication metering devices.
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