3. Overview/functional description
The VPK sectional progressive metering de-
vice is available in the designs VPKM (met-
ric threaded connectors) and VPKG (inch
threaded connectors). With their metering
sections, VPKM and VPKG cover a nominal
volume per outlet and cycle of 0.05 cm
3
(twin section) to 0.6 cm
3
(single section).
The inlet of the progressive metering device
is located at an inlet section. The outlets
are at the downstream progressive meter-
ing device sections. The delivery ducts are
sealed by elastic seals (plates). An end sec-
tion is located downstream of the last pro-
gressive metering device section.
All sections are interconnected with tie-
rods. They seal the progressive metering
device assembly.
The volumetric flow fed via a tube is forcibly
distributed in a predetermined ratio to the
outlets, i.e., to the lubrication points or the
downstream progressive metering devices.
Pistons aligned in series meter the lubricant
for two opposite outlets each and control the
function of the neighboring piston. This way,
the function of the sectional progressive
metering device can be checked by monitor-
ing any piston by means of a cycle indicator
or piston detector.
Optional integrated check valves integrated
offer high functional reliability (at high or dif-
fering back pressures). They also provide ac-
curate metering and safe blocking behavior,
even for internal and external consolidation
of lubricant outlets.
Progressive metering devices distribute
a lubricant quantity delivered by a pump
to multiple outlets. The individual meter-
ing device sections determine the quantity
distribution.
The different output quantities within a
metering device are achieved by using vari-
ous progressive metering device sections or
consolidating two or more outlets.
For main metering device/secondary meter-
ing device systems, check valves must be
used on the metering device outlets of the
main metering device.
For the VPKM and VPKG sectional progres-
sive metering devices, progressive lubricant
metering device sections for two connec-
tions (T = twin) or for one connection (S =
single) are available. In case of single sec-
tions, the two opposite outlets are connected
internally, whereby one outlet is closed.
For the VPK progressive metering device, it is
also possible to consolidate two neighboring
outlets after the progressive metering de-
vices have been completely installed.
A progressive metering device of the series
VPK consists of at least three to a maximum
of ten metering sections.
3
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951-230-008-EN
Version 04
EN
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