SMG-2 DOSERS

SAFEGREASE 2, MULTILUBE SMG-2 DOSERS

ASMG2BEN.doc 28.07.2003 Rev. 2B

SMG-2 DOSERS

TABLE OF CONTENTS

1 GENERAL DESCRIPTION................................................................................................................................1 2 DESIGN .............................................................................................................................................................1 3 OPERATION......................................................................................................................................................1

3.1 Dosers with two outlets ...............................................................................................................................1 3.2 Dosers with one outlet.................................................................................................................................1 3.3 The unfastening and fastening of the doser ...............................................................................................2

4 ADJUSTMENT...................................................................................................................................................2 4.1 General........................................................................................................................................................2 4.2 Doser adjustments ......................................................................................................................................2

5 TECHNICAL SPECIFICATION..........................................................................................................................2 5.1 Technical specifications ..............................................................................................................................2 5.2 Connections ................................................................................................................................................3 5.3 Symbols ......................................................................................................................................................3

6 SPARE PARTS..................................................................................................................................................3

8 APPENDICES



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SMG-2 DOSERS

1 GENERAL DESCRIPTION

SMG-2 doser feeds the preset amount of lubricant to one to eight (1 – 8) lubrication points.

2 DESIGN

Note Numbers in brackets are part numbers in the drawing 461588.

The doser includes a disc valve (pos.1) and a dosage cylinder (pos.3) which is equipped with a sealed piston (pos.2). The movement of the piston is adjusted with the adjustment screw (pos.4).

The doser lubrication outlet connectors (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.

3 OPERATION

Note Line- and lubrication point markings are presented in the drawing 461588.

3.1 Dosers with two outlets

During normal sequential operation, a doser with two outlets feeds lubricant to opposite outlet connections.

The pressure in line 1 increases during pressurization and the disc valve moves to its extreme position, whereupon the lubricant moves the piston. When the piston moves, it pushes the lu-bricant through the check valve to the lubrication pipe or lubrication hose and further to the lu-brication point P1.

When the pumping starts again, the directional 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.

3.2 Dosers with one outlet

A doser with two outlets is modified to doser with one outlet by removing the disc valve and the lubrication outlet connector and replacing them with blocking plug (pos.7).

During normal sequential operation, a doser with one outlet feeds the lubricant in turns to lubri-cation outlet connection and to one of the main lines.

The pressure in line 1 increases during pressurization and the disc valve moves to its extreme position, whereupon the lubricant moves the piston. When the piston moves, it pushes the lu-bricant to line 2.

When the pumping starts again, the directional 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 P3.



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3.3 The unfastening and fastening of the doser

Warning When changing the dosers, make sure that there is no pressure in the sys-tem.

4 ADJUSTMENT

4.1 General

The lubricant dosage is adjusted by changing the movement of the piston with the adjustment screw.

4.2 Doser adjustments

SMG-2 -dosers are adjusted with an allen screw, which is located inside of a metal cover. The other end of the allen screw is located in the dosage cylinder, so the adjustment affects directly to the piston.

SMG-2 –doser adjustment

1. Make sure that there is no pressure in the lines. 2. Remove the metal cover. 3. Turn the allen screw to its closing position. 4. Look at the adjustment graph for the number of adjustment screw turns that corresponds to

the desired lubrication dosage. 5. Turn the adjustment screw outward from the doser body as many turns as instructed. 6. Replace the cover.

Table 1. Drawing numbers of adjustment graphs

Doser type Code Drawing number

SMG-2-1-ZN 11391525 360698E SMG-2-2-ZN 11391530 360697E SMG-2-4-ZN 11391535 360894 SMG-2-1-ZN-U 12800350 361045A SMG-2-2-ZN-U 12800360 361046A SMG-2-4-ZN-U 12800370 361047A

5 TECHNICAL SPECIFICATION

5.1 Technical specifications

Table 2. Technical specifications of the dosers

Quantity Range Unit Description

t -35…+80 °C Operation temperature pmax 200 bar Max. operation pressure



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5.2 Connections

Inlet and outlet connections are in the doser body.

Inlet • lubricant (2 pcs), main header inlets, female thread R 1/8” or NPT 1/8”

Outlet • lubricant (2 pcs), main header outlets, female thread R 1/8” or NPT 1/8” • lubricant (2–8 pcs), lubrication pipe outlets, 1-4 pcs on both sides,

pipe connector ∅ 6 mm or female thread NPT 1/8”

5.3 Symbols

Table 3. The symbols of dosers

SMG-X-Y-ZZ-U Abbreviation Description

SMG: SMG Lubrication system type, SafeMobeGrease X: 2 Number of lines, 2-line Y: 1 Doser body size 1; 2 outlets 2 Doser body size 2; 4 outlets 4 Doser body size 4; 8 outlets ZZ: ZN Doser material,

zinc-coated and yellow-passivated steel U: no symbol Lubricant outlet, pipe connector ∅ 6 mm U Lubricant outlet, female thread NPT 1/8”

Example:

SMG-2-1-ZN

Lubrication system type, SafeMobeGrease

Number of lines, 2-line

Doser body size 1; 2 outlets

Doser material, zinc-coated and yellow-passivated steel

Lubricant outlet: pipe connector ∅ 6 mm

6 SPARE PARTS

See SMG-2 doser spare parts (drawing 461587C)

Documents

SMG-2 DOSERS