1.
INSTALLATION
IOM manual CTX centrifugal pumps
7
1.4.
Storage
If the equipment is to be stored prior to installation, place it in a clean location. Do not
remove the protective covers from the suction and discharge which have been fastened to
keep pump internals free of debris. Clean the pump thoroughly before installation.
When in storage, turn the shaft by hand at least once per month. The pump-motor unit
should always be stored indoor in dry, vibration and dust free conditions.
1.5.
Foundation
The pump-motor unit must stand on and be fixed to a sufficiently rigid structure that can
support the entire perimeter on which the unit stands. The foundation on a firm bottom is
the most satisfactory. Once the pump is in position, adjust level with metal shims between
the feet and the surface on which it stands. Check that the feet of the pump motor unit stand
well on each of them. The surface on which the foundation stands must be flat and
horizontal. If the unit is fitted on a steel structure, make sure that it is supported so that the
feet do not warp. In any case, it is advisable to fit some anti-vibration rubber pieces between
the pump and the brickwork. The motor needs an additional stand as its level is higher than
that of the pump casing. As an option the pump can be ordered with feet for the motor. For
close-coupled type, pump motor alignment is not required.
1.6.
Environment
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There should be enough space in the vicinity of the pump in order to operate, maintain
and repair it.
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The area in which the pump is operated, must be sufficiently ventilated. Excessive
temperature, humidity or dirt may affect the pump operation.
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Behind the cooling fan of the motor there must be sufficient room for the hot air to
escape the motor.
1.7.
Suction and discharge piping
A pump is generally part of a piping system that can include a number of components such
as valves, fittings, filters, expansion joints, instruments, etc. The way the piping is arranged
and the positioning of the components has a great influence on the operation and the
lifetime of the pump. The pump cannot be used as a support for the components connected
to it.
The flow of liquid from the pump must be as even as possible. It is advisable to avoid any
tight bends or drastic reductions of diameters that may cause flow resistance in the
installation. In case of diameter reduction, it is advisable to use appropriate conical
reductions (possibly eccentric on suction side and concentric on discharge side) at changes
of diameter and at a minimum distance from pump connections of five diameters of the
pipeline.
1.7.1.
Connection of discharge pipe
A check-valve and a shut-off/regulation valve are normally fitted on the discharge side.
The check-valve protects the pump from any backflow. The shut-off/regulation valve cuts off
the pump from the line and adjusts the output. Never adjust flow rate using the valve on the
suction pipe.