SKF KFG, Руководство по сборке

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Page 55
EN
6. Functional description in progressive systems
6.1.2 Pressure regulating valve
A pressure regulating valve must be installed
on the pump element on progressive systems
to prevent excessive operating pressure in the
lubrication system. If the operating pressure
exceeds the cracking pressure of the pressure
6.1 Functional description of progressive
systems with KFG pump unit
A general progressive feeder system con-
sists of the following components:
• Pump unit with pump element and pressure
regulating valve
• Lubrication lines, consisting of main and
possibly branch lines
• Progressive feeders
When the pump motor is turned on, the piston
pump delivers lubricant from the lubricant res-
ervoir to the lubricant outlet. The pump ele-
ment attached to the outlet delivers the lubri-
cant further, into the downstream main line.
The lubricant flows through the main line to
the progressive feeder. There, the lubricant is
distributed according to the volume required
by the lubrication point being supplied.
In progressive systems with a master feeder
and secondary feeder, the lubricant coming
from the pump unit is delivered to the master
feeder. The master feeder distributes the lubri-
cant to the secondary feeders according to
their individual volume requirements. From
there, the lubricant flows to the lubrication
points.
6.1.1 Pump element
The pump element(s) meter the lubricant then
pass it to the downstream lubrication points or
feeders. Five different pump elements with a
delivery volume ranging from 0.8 to 5 cm
3 /min.
are available to provide the required quantity
of lubricant (see Chapter 4.3.4 in the assembly
instructions).
Progressive system with KFG pump unit
1 KFG unit
2 Pump element with pressure
regulating valve
3 Electrical pump connection
4 Lubrication lines
5 Master feeder
6 Secondary feeder
7 Lubrication points
Example of progressive system with KFG pump unit
2
3
7
6 6
5
4
4
4
1
Layout of pump elements
regulating valve (see Technical Data, Chap-
ter 4.3.5 in the assembly instructions), the
valve opens and the lubricant lows back (on
versions with a return line) into the lubricant
reservoir.
6. Functional description in progressive systems
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