General Description; Design; Operation - SAFEMATIC MLP Series Manual

PUMPING UNIT MLP

1 GENERAL DESCRIPTION

The pumping unit is designed for pumping lubricant into central lubrication system.

2 DESIGN

Note
Pumping unit comprises of a body (pos.1) and a lubricant reservoir (pos.2).
The body comprises of a pump element (pos.3), an electric motor (pos.4), a line valve (pos.5),
a pressure relief valve (pos.6), a heating element (pos.7) and a power supply (pos.8). Pumping
unit is controlled by a user interface (pos.9) and a circuit board (pos.10). If external control is
used, user interface and circuit board are replaced with relays (pos.11). Pumping unit is
equipped with a pressure sensor (pos.12) for each line which can be replaced with an external
pressure control unit.
Lubricant reservoir is equipped with a follower piston (pos.13), a level indicator (pos.14) and a
low level switch (pos.15). Filling connector (pos.16) of the lubricant reservoir is equipped with a
filter (pos.17) and a safety valve (pos.18).
Pumping unit is equipped with a supporting block (pos. 19).

3 OPERATION

When pressurization begins, the control starts the pump and opens the line valve. In pressure
sensor and pressure transmitter operation the pump stops when pressure exceeds the set high
limit and starts, when the pressure goes below the set high limit. In pressure switch operation
the pump stops, when the pressure switch closes and restarts, when the pressure switch
opens. After the set pressurization time, the control stops the pump and pressure discharges
from the line to the lubricant reservoir.
If the lubricant level in the reservoir drops to the low limit level during pumping, the reservoir
low level switch sends an alarm to the control and pumping is stopped. The alarm can be
disabled by filling the lubricant reservoir and resetting the alarm.
Caution
Caution
HMLU2CEN.doc
Numbers in brackets are part numbers of drawing 461790A.
The viscosity of used oil must be min. 46 cSt in pumping unit operation
temperature.
Check valve EOS-CV must be used in an oil lubrication system. The check
valve prevents the piping from draining during interval. See drawing
462119.
MULTILUBE
MLP
1 (5)
21.03.2006 Rev. 2C