USER INSTRUCTIONS POLYCHEM GRP ENGLISH 71569132 12-04A
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.
Gland packing must not be used when pumping
hazardous liquids.
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 OPERATE THE PUMP WITH
THE SUCTION VALVE CLOSED
It should be fully opened when the pump is running.
NEVER RUN THE PUMP DRY OR
WITHOUT PROPER PRIME (Casing Flooded)
NEVER OPERATE THE PUMP AT
ZERO FLOW OR FOR EXTENEDED 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
Measures are required to:
Avoid excess temperature
Prevent build up of explosive mixtures
Prevent the generation of sparks
Prevent leakages
Maintain the pump to avoid hazard
The following instructions for pumps and pump units
when installed in potentially explosive atmospheres
must be followed to help ensure explosion protection.
Both electrical and non-electrical equipment must meet
the requirements of European Directive 94/9/EC.
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.
