B&C Technologies IM Series Industrial Ironer - Manual (Page 107)

Straight-edge
Gauge
Straight-edge
Gauge
Caution
Caution
121
1:
19/
4
Etanorm SYA
8
The pump set is correctly aligned, if a straight-edge placed ax-
ially on both coupling halves is the same distance from each
shaft at all points around the circumference. Make sure to turn
the measuring point by hand all the time. In addition, the dis-
tance between the two coupling halves must remain the same
all around the circumference. Use a gauge to verify, for
example (see Figures 5.3-4 and 5.3-5).
Fig. 5.3-4: Aligning a flexible coupling without spacer sleeve
Fig. 5.3-5: Aligning a flexible spacer-type coupling
The radial and axial deviation between the two coupling halves
shall not exceed 0.1 mm.
This must also be ensured at operating temperature and under
actual inlet pressure.
Improper alignment of the unit can cause dam-
age to both the coupling and the unit itself!
5.3.2 Place of Installation
The volute casing and the discharge cover take on
roughly the same temperature as the medium handled.
The discharge cover and the bearing bracket must not be
insulated.
Take the necessary precautions to avoid burns.
5.4 Connecting the Piping
Never use the pump itself as an anchorage point
for the piping.
The piping-induced forces and moments acting on the pump
flanges (e.g. due to torsion or thermal expansion) must not ex-
ceed the permissible forces and moments specified in section
4.4.
The inlet line must be laid with a downward slope towards the
pump to avoid the formation of air pockets.
The pipelines must be anchored in close proximity to the pump
and connected without transmitting any stresses or strains. The
pump must not bear the weight of the pipelines.
The nominal diameters of short pipelines shall be at least equal
to the nominal diameters of the pump nozzles. For long pipe-
lines the most economical nominal diameter has to be deter-
mined from case to case.
Adapters to larger diameters should have a diffuser angle of
approx. 8
° in order to avoid any increase in pressure losses.
It is recommended to install check and shut-off elements in the
system, depending on the type of plant and pump.
Thermal expansions of the pipelines must be compensated by
appropriate measures so as not to impose any extra loads on
the pump.
An excessive, impermissible increase in the pipeline
forces may cause leaks on the pump where the medium
handled can escape into the atmosphere.
Danger of life when hot media are handled!
The flange covers on the pump suction and discharge nozzles
must be removed prior to installation in the piping.
Before commissioning new installations, thoroughly clean,
flush and blow through all vessels, pipelines and connections.
Often welding beads, scale and other impurities only come off
after a certain period of operation. Fit a strainer in the suction
line to prevent them from entering the pump. The total cross
section of the holes in the strainer shall be three times the cross
section of the pipeline in order to avoid excessive pressure loss
across the strainer due to clogging. Conical strainers with laid-in
wire mesh having a mesh width of 1.25 mm and a wire diameter
of 0.4 mm, of corrosion-resistant material, shall be used.
1 Strainer housing
2 Fine screen
3 Perforated plate
4 Pump suction nozzle
5 Differential pressure gauge
Fig. 5.4-1 Conical strainer for the suction line
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