Dual line systems

Dual-line systems – robust lubrication for large plants

The dual-line system works with two main lines that are pressurised alternately by the pump through a reversing valve. The dual-line distributors (metering devices) are connected to both lines: when line 1 is under pressure, the distributors deliver their set quantity of lubricant on one side; after switching to line 2, delivery takes place on the other side. So at every pressure change a defined quantity is dispensed to each lubrication point. The hallmark of the dual-line principle is its robustness and its ability to supply very many points over long distances — the classic choice for large installations. It is a core part of DropsA's distribution range. The pump charges one of the two main lines while the other is relieved; a reversing valve then swaps them, and the cycle repeats. Each dual metering valve delivers a defined dose on each changeover, so every point is served regardless of how far it sits from the pump or how many other points the system has. The delivered quantity is set at the valve and the lines stay under pressure to the end of the run, so supply stays reliable even on very large networks. Two main lines pressurised alternately via a reversing valve Defined dose to each point on every changeover Reliable supply over long distances and very many points Robust, classic choice for large, demanding installations Monitorable with dual metering valves and a control unit A dual-line system combines a pump with a reversing valve, the two main lines and the dual metering valves at the points, supervised by a control unit . It is selected by the number of points, the line lengths, the medium (oil or grease) and the delivery required at each point. For smaller machines, a progressive distributor is the alternative; dual-line comes into its own on the largest plants.