Victor Pumps R-Serie Betriebs- Und Wartungsanleitung Seite 9

R
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 pumps have only one 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 reversible. Full capacity is
obtained in either direction of rotation.
1.7 R pumps are supplied with a bearing housing
suitable for coupling with V-belts or flexible
couplings.
1.8 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 life of pump especially if the liquid
contains abrasive impurities.
All manuals and user guides at all-guides.com
Operating Instructions
»R« Pumps
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.
: By-pass relief valves should not be
A
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-404021-1E
29/03/98