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Beschikbare talen
Beschikbare talen
5.3 Hot and cold parts
DANGER OF BURNING!!
As well as being at high temperature and high pressure, the fluid in the system may also be in the form of steam!
It may be dangerous even to touch the pump or parts of the system.
If the hot or cold parts are a source of danger, they must be accurately protected to avoid contact with them.
6.
INSTALLATION
The pumps may contain small quantities of residual water from testing. We advise flushing them briefly with clean
water before their final installation.
The electropump must be fitted in a well ventilated place, with an
environment temperature not exceeding 50°C.
If the unit is installed in a location where there is a risk of explosion,
the local regulations on "Ex" protection must be respected, using
only suitable motors.
The pump for power ratings up to and including 7.5 kW can be
installed either vertically or horizontally. For powers exceeding 7.5
kW, the pump must be installed in a vertical position. (See Fig.3)
6.1 Foundation
The buyer is fully responsible for preparing the foundation which must be made in conformity with the dimensions. Metal foundations must
be painted to avoid corrosion; they must be level and sufficiently rigid to withstand any stress. Their dimensions must be calculated to avoid
the occurrence of vibrations due to resonance.
With concrete foundations, care must be taken to ensure that the concrete has set firmly and is completely dry before placing the unit on it.
The surface that it sits on must be perfectly flat and horizontal. After the pump has been positioned on the foundation, check with a spirit
level to ensure that it is sitting perfectly level. If not, suitable shims must be inserted.
6.2 Connecting the pipes
Ensure that the metal pipes do not transmit excess force to the pump apertures, so as to avoid causing deformations or breakages. Any
expansion due to the heat of the pipes must be compensated with suitable precautions to avoid weighing down on the pump. The
counterflanges of the pipes must be parallel to the flanges of the pump.
To reduce noise to a minimum it is advisable to fit vibration-damping couplings on the intake and delivery pipes.
It is always good practice to place the pump as close as possible to the liquid to be pumped. It is advisable to use a suction pipe with a
diameter larger than that of the intake aperture of the electropump. If the head at intake is negative, it is indispensable to fit a foot valve with
suitable characteristics at intake. Irregular passages between the diameters of the pipes and tight curves considerably increase load losses.
Any passage from a pipe with a small diameter to one with a larger diameter must be gradual. Usually the length of the passage cone must
be 5 to 7 times the difference in diameter.
Check accurately to ensure that the joins in the intake pipe do not allow air infiltrations. Ensure that the gaskets between flanges and
counterflanges are well centred so as not to create resistances to the flow in the pipes. To prevent the formation of air pockets, the intake
pipe must slope slightly upwards towards the pump.
If more than one pump is installed, each pump must have its own intake pipe. The only exception is the reserve pump (if envisaged) which,
as it starts up only in the case of breakdown of the main pump, ensures the operation of only one pump for each intake pipe. Interception
valves must be fitted upstream and downstream from the pump so as to avoid having to drain the system when carrying out pump
maintenance.
6.3 Insulation
− To protect the pump from deposits, it should not be installed at the lowest point of the system. Only install the pump on the system after
all welding work has been completed and check that the system is properly cleaned.
− The pump must be installed in a well ventilated place, protected from unfavourable weather conditions, and with an environment
temperature not higher than 50°C.
− The electric pumps with IPX5 degree of protection are protected against water jets.
ENGLISH
Fig.3
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