Victor Pumps R-Serie Betriebs- Und Wartungsanleitung Seite 29

R
»R« magnetic internal gear pumps
1. DESCRIPTION
1.1 R pumps are positive displacement internal
gear rotary pumps suitable for pumping liquids of
any viscosity. Special versions can also pump
liquids containing abrasive particles.
1.2 R pumps are self-priming and work on suction
lifts up to a maximum of 8 meters water column.
The suction lift is limited by fluid vapor pressure or
by low viscosity.
1.3 The gear within a gear working principle produces
a smooth, non pulsating flow.
1.4 R Magnetic driven internal gear pumps have no
rotating shaft seal.
1.5 The axial position of the rotor can be adjusted
and the gears inspected without removing the
pump from its pipework.
1.6 R pumps are supplied with a bearing housing
suitable for coupling with V-belts or flexible
couplings.
1.7 The pumps are identified by the type and the
serial number. The pump model is stamped on a
name plate fixed on the bearing housing. The
serial number is punched on the pump casing,
close to the name plate.
2. INSTALLATION
2.1 R pumps are supplied with an internal protective
liquid. If this liquid can pollute the product being
pumped, flush the pump before installing it. Do
not test the pumps with water.
2.2 Install the pump on a level surface as close as
possible to the level of the liquid to be pumped in
an accessible position for maintenance and
operation.
2.3 Unless otherwise specified, the diameter of the
suction line should be equal to that of the pump
suction port. The length of the suction line should
be as short as possible. Avoid curves,
constrictions and valves as far as possible.
Liquefied gases can be pumped only on flooded
suction.
2.4 It is advisable to fit a filter in the suction line near
the suction port to protect the pump from foreign
bodies, welding scarves, flakes of iron, etc. which
can damage the pump.
2.5 The size of the delivery line must be calculated to
reduce friction losses. High pressures may reduce
All manuals and user guides at all-guides.com
Operating Instructions
life of pump especially if the liquid contains
abrasive impurities.
2.6 Ensure that pipes are clean. Check that pipe
threads and flange gaskets are completely airtight.
2.7 Piping should be supported independently of the
pump as far as possible to reduce strain on the
pump casing to a maximum.
Check the alignment of the flexible coupling after
pump installation.
2.8 If a non-return valve is fitted in the delivery line
and a pressure greater than 2 bar is applied the
pump cannot self-prime because the air expelled
from the pump cannot escape through the non-
return valve. In this case fit a vent between the
pump and the valve.
2.9 By-pass relief valves available on request are
designed primarily to protect the pump casing and
piping against damage if the pump is run with the
delivery line close or clogged. If the pump is used
in both directions, double By-pass valves are
also available.
A : By-pass relief valves should not be
TTENTION
considered as flow regulation valves. To
change the pump capacity use either a variable
speed drive or a return to tank line.
2.10 Pumps supplied with a heating jacket can be
heated with steam (max. pressure 10 bar) or with
heat transfer oil up to 230 °C.
If the pump has more than one heating jacket,
they can be connected in series or in parallel. If
the pump has to run at the maximum allowed
temperature of 300 °C, it is advisable to leave the
heating jacket around the shaft seal out of the
heating circuit to avoid overheating due to the
friction of the seal.
2.11 Connections on the delivery and the suction ports
are provided for pressure and vacuum gauges.
Such connections are standard on all pump
models. Vacuum and pressure gauges often help
to find possible causes of either operating or
installation problems.
2.12 Electric motors must be protected by adequate
overload cutoff switches that should be set to the
maximum current shown on the motor name plate.
Ensure that the surroundings are adequately
ventilated.
R-9100699-1E
06/10/99