SKF Multilube - SMG-Doser (Twinheavy-System); SMG-Doser General Description & Design; SMG-Doser Operation (Two Outlets)

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SMG-dosers, Twinheavy-system
General description
SMG-2 doser feeds the preset amount of lubricant to one to eight (1 – 8) lubrication points.
Design
The doser includes a disk valve (pos. 1) and a dosage cylinder (pos. 3) which is equipped with
sealed piston (pos. 2). The movement of the piston is adjusted with the adjusting screw
(pos. 4).
The doser lubrication outlet connections (pos.5) are equipped with check valves (pos. 6). The
design of the dosers makes it possible to feed small amounts of lubricant from dosers.
Operation
Dosers with two outlets
During normal sequential operation, dosers with two outlets feed lubricant to opposite sides
of the outlet connections.
The pressure in the line 1 increases during pressurization and the disk valve moves to its
extreme position, whereupon the lubricant moves the piston. When the piston moves, it
pushes the lubricant through the check valve to the lubrication pipe or lubrication hose and
further to the lubrication point P1.
When the pumping starts again, the check valve directs the lubricant to line 2, whereupon
the lubricant is directed to the opposite side of the piston. When the piston moves, it pushes
the lubricant through the check valve and further to the lubrication point P2.