Differences Between Resistance-type and Pressure-relief Lubrication Systems

Description

In resistance-type systems, oil delivery depends on flow resistance: lower resistance gives a larger volume, while higher resistance gives a smaller volume. This is similar to a tap: closing it reduces flow and opening it increases flow. The delivered volume is therefore less precise.

Pressure-relief systems are also called positive-displacement or metered systems. The lubricator has a pressure-relief device, and the distributor first stores oil in a chamber. Only this fixed volume is discharged, providing precise, metered delivery.

Operating principle

When the lubricator operates, the pump supplies oil to the main line and distributors. The distributors continue delivering oil throughout the lubrication period until that period ends.

When the lubricator operates, the pump supplies oil to the main line and positive-displacement distributors. Once their storage chambers are full, the line and distributors cannot hold further oil. Excess oil is then released through the relief valve inside the lubricator.

Drive options

Manual, electric or pneumatic.

Manual, electric or pneumatic.