Flowserve S-series PolyChem - Manual (Page 6)

USER INSTRUCTIONS POLYCHEM S-SERIES ENGLISH 71569207 11-08
Page 6 of 52
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THERMAL SHOCK
Rapid changes in the temperature of the liquid within
the pump can cause thermal shock, which can result
in damage or breakage of components and should be
avoided.
HAZARDOUS LIQUIDS
When the pump is handling hazardous liquids care must
be taken to avoid exposure to the liquid by appropriate
siting of the pump, limiting personnel access and by
operator training. If the liquid is flammable and or
explosive, strict safety procedures must be applied.
PREVENT EXCESSIVE EXTERNAL
PIPE LOAD
Do not use pump as a support for piping. Do not mount
expansion joints, unless allowed by Flowserve in writing,
so that their force, due to internal pressure, acts on the
pump flange.
ENSURE CORRECT LUBRICATION
(See section 5, Commissioning, startup, operation
and shutdown.)
NEVER EXCEED THE MAXIMUM
DESIGN PRESSURE (MDP) AT THE TEMPERATURE
SHOWN ON THE PUMP NAMEPLATE
See section 3 for pressure versus temperature
ratings based on the material of construction.
NEVER OPERATE THE PUMP WITH
THE DISCHARGE VALVE CLOSED
(Unless otherwise instructed at a specific point in the
User Instructions.)
(See section 5, Commissioning start-up, operation
and shutdown.)
NEVER RUN THE PUMP DRY OR
WITHOUT PROPER PRIME (Casing flooded)
NEVER OPERATE THE PUMP WITH
THE SUCTION VALVE CLOSED
It should be fully opened when the pump is running.
NEVER OPERATE THE PUMP AT
ZERO FLOW OR FOR EXTENDED PERIODS
BELOW THE MINIMUM CONTINUOUS FLOW
THE PUMP SHAFT MUST TURN
CLOCKWISE WHEN VIEWED FROM THE MOTOR
END
It is absolutely essential that the rotation of the motor
be checked before installation of the coupling spacer
and starting the pump. Incorrect rotation of the pump
for even a short period can unscrew the impeller,
which can cause significant damage.
1.6.4 Products used in potentially explosive
atmospheres
The following instructions for pumps and pump
units when installed in potentially explosive
atmospheres must be followed to help ensure
explosion protection. The terminology and
procedures ensure that the installed pump is in
compliance with the European Directive 94/9/EC,
known as the ATEX Directive, which is mandatory in
Europe and may also be specified in other countries.
Where applicable, both electrical and non-electrical
equipment must meet the requirements 94/9/EC.
Even if the installation is in a region where ATEX is
not the applicable regulation, the general measures
described shall be followed to ensure safe operation.
The measures are explained under the headings of:
• Avoiding
excessive surface temperature
• Preventing build up of explosive mixtures
• Preventing the generation of sparks
• Preventing
leakages
• Maintaining the pump to avoid hazard
1.6.4.1 Scope of compliance
Use equipment only in the zone for which it is
appropriate. Always check that the driver, drive
coupling assembly, seal and pump equipment are
suitably rated and/or certified for the classification of the
specific atmosphere in which they are to be installed.
Where Flowserve has supplied only the bare shaft
pump, the Ex rating applies only to the pump. The
party responsible for assembling the pump set shall
select the coupling, driver and any additional
equipment, with the necessary CE Certificate/
Declaration of Conformity establishing it is suitable for
the area in which it is to be installed.
The output from a variable frequency drive (VFD) can
cause additional heating effects in the motor and so,
for pumps sets with a VFD, the ATEX Certification for
the motor must state that it is covers the situation
where electrical supply is from the VFD. This
particular requirement still applies even if the VFD is
in a safe area.