The dual–line system conveys the lubricant under pressure over a 3/2 way control valve via two main lines through the entire lubrication system.
During the discharge time (“dead time”) of one line, the other line is active.
Overlapping or a direct connection in the two main lines is possible. The
lubricant distributor can consist of one, or several distribution
elements.
All components in a dual-line system can be merged in one element.
The lubricant distributors are integrated in these two main lines which are alternately operated by pressure increase and pressure decrease and convey the lubricant through the high-pressure hose lines. In a dual-line system, the pressure alternation is controlled by a reversal between the pump and lubricant distributor.
A dual-line system is mainly suitable for centralised lubrication systems where high-pressure ranges are needed, with a high number of lube points and long line distances.The application field for dual-line systems is large industrial plants where the lube points are not next to each other. Further, the dual-line system is often the perfect solution and used in industrial branches like mills.