7. Functional description in single-line systems
7.1.2 Pressure relief valve
In order to allow another lubrication cycle after
metering is complete, the main line must first
be relieved of pressure, which also relieves the
downstream single-line distributors. The main
line and single-line distributors relieve into the
lubricant reservoir.
7.1 KFG-Pump unit
A general single-line system consists of a
pump unit with pump element and pressure
regulating valve, pressure relief valve and fill
level monitoring, main line and single-line
distributors.
When the pump motor is turned on, the piston
pump delivers lubricant from the reservoir to
the lubricant outlet. The pump element at-
tached to the outlet meters the lubricant and
delivers it further through the pressure relief
valve attached to the pump element on to the
main line. The lubricant flows through the
main line to the single-line distributors, where
it is metered and passed to the lubrication
points. This is performed during or after the
pump cycle time, depending on the type of dis-
tributors used (prelubrication or relubrication
distributors). The pressure relief valve switches
after pressure build-up is complete. After the
main line has been relieved, the pump unit is
now prepared for another lubrication cycle.
7.1.1 Pump element
The pump element delivers the lubricant ac-
cording to the capacity of the connected sin-
gle-line distributors. There are both prelubri-
cation distributors and relubrication
distributors.
7.1.3 Pressure regulating valve
A pressure regulating valve can be installed
single-line systems to prevent excessive oper-
ating pressure in the lubrication system. The
pressure regulating valve (see Technical Data,
Chapter
4.3.5 in the assembly instructions)
opens when operating pressure exceeds its
cracking pressure. The lubricant escapes
through the valve or flows back into the reser-
voir. This protects the pump unit against
overload.
7. Functional description in single-line systems
Pressure relief valve/pressure regulating
valve, Fig. 6
KFG
Page 60
EN
To Next Page
Loading...
