salmson SIL Serie Instalacion Y Puesta En Servicio página 59

D C
Fig. 43: Example of a foundation screwed
connection
Connection of the pipes
Installation and operating instructions SIL, PBS (with cartridge mechanical seal)
E A B
CAUTION! Risk of property damage!
Risk of damage due to incorrect handling.
• When pumping out a tank, ensure that the fluid level is always high
enough above the suction port of the pump so that the pump never
runs dry. The minimum inlet pressure must be observed.
NOTE:
In the case of insulated systems, only the pump housing may be
insulated, not the lantern or drive.
Example of a foundation screwed connection (Fig. 43):
• Align the whole unit when installing on the foundation with the help
of the spirit level (at the shaft/pressure port).
• Always put the washers (B) to the left and right directly at the fixation
material (e.g. stone bolts (A)) between the baseplate (E) and founda-
tion (D).
• Evenly and firmly tighten the fixation material.
• For distances > 0.75 m, support the baseplate at the centre between
the fastening elements
CAUTION! Risk of property damage!
Risk of damage due to incorrect handling.
• Under no circumstances may the pump be used as a fixed point for
the pipe.
• The pipes and pump must be free of mechanical stress when installed.
The pipes must be fixed in such a way that the pump is not supporting
the weight of the pipes.
• The present NPSH of the system always has to be greater than the
required NPSH of the pump.
• The forces and torques being exerted by the pipe system on the pump
flange (e.g., by warping, thermal expansion) may not exceed the per-
mitted forces and torques.
• Brace the pipes directly before the pump and connect them without
tension. Their weight must not put a strain on the pump.
• The inlet pipe is to be kept as short as possible. Lay the inlet pipe to
the pump so that it continuously rises while the intake falls. Avoid
possible air entry points.
• If a dirt trap in the inlet pipe is required, then its free cross-section has
to be 3 – 4 times the cross-section of the piping.
• For short pipes, the nominal diameters should be at least that of the
pump connections. The long pipes, the most economical nominal
diameter is to be determined on a case-by-case basis.
• Adapters for larger nominal diameters should be made with a flaring
angle of about 8° to prevent greater pressure losses.
NOTE:
Shut-off devices shall be installed in front of and behind the pump in
all cases, in order to avoid having to drain the entire system when
checking, servicing or replacing the pump. If required, a non-return
valves is to be provided.
English
47