Sulzer VMS - Page 16

16 Installation, Operating and Maintenance Instructions (Original Instructions)
VMS Vertical Multistage Pumps
16
• Regularly examine the condition of the bearings in the motor and/or thrust bearing housing (for example by
means of vibrations measurement) in order to detect damage of the bearing raceways/roller elements. Stop
the application of the pump when damage in a roller element bearing is found.
• If a ammable medium is pumped, its temperature may not exceed its ignition temperature minus 50 °C.
• Take care with an intensively used pump which is successively not used for a while; when it is started again,
leakage can occur at the shroud.
• Do not pump di󰀨erent mediums which can have chemical reactions with each other.
If the pump is supplied without motor, it is compulsory to also check the following additional points prior to
putting the pump in operation:
• Apply a motor that is ATEX certied for Equipment Group IIG.
• The determination of the ATEX code and certication of the assembly is the responsibility of the owner of the
pump/motor. The di󰀨erent parts of the ATEX code of the assembly are determined by the lowest specication
of pump or motor.
• Apply a motor that has a special bearing which is suited to support the high axial loads at the pump shaft. If
this is not the case, a thrust bearing housing has to be applied.
• Apply a motor with a nominal power which is suited to drive the pump at the operating frequency.
• Apply a motor that has the proper frame size to connect with the motor stool.
If a pump supplied with thrust bearing housing or a solely supplied thrust bearing housing is supplied, it is
compulsory to also check the following additional points prior to putting the pump in operation:
• Wrong adjustment of the axial play between the thrust bearing housing shaft and the motor shaft could result
in too high impacts between these shafts and/or increased wear of the roller element bearings. Assembling of
the electric motor on the thrust bearing housing has to be done by a certied mechanic from the supplier of
the pump.
• When the thrust bearing housing has a grease nipple it can be lubricated. Proper lubrication is important
to prevent high temperatures in the bearing. If the thrust bearing housing has grease nipple it is obligatory
to take care of adequate lubrication by supplying grease on a yearly basis. This needs to be grease with a
melting point and ignition temperature of minimally 200 °C.
• Do not install the pump horizontally or upside down.