3. Overview/functional description
3
The VP sectional progressive metering de-
vice is available in the designs VPM (metric
threaded connectors) and VPG (inch thread-
ed connectors).
With their progressive metering device sec-
tions (metering sections), VPM and VPG
cover a nominal volume per outlet and cycle
of 0.1 cm
3
(twin section) to 1.2 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.
Check valves integrated standard offer high
functional reliability (at high or differing
back pressures). They also provide accurate
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 the VPM and VPG sectional progressive
metering devices, sections for two outlets
(T = twin) or for one outlet (S = single) are
available. In case of single sections, the two
opposite outlets are connected internally,
whereby one outlet is closed. Each section is
equipped with a lateral and an upper outlet
per side. Only one outlet can be connected
at a time. The second outlet must be blocked
by either a plug screw, a blockage indicator,
or a lubricant nipple. If necessary, crossport-
ing bars can also be connected to the upper
outlets.
A progressive metering device of the series
VP consists of at least three to a maximum
of ten progressive metering device sections.
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951-230-008-EN
Version 04
EN
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