Flowserve QLQ Vertical Worthington - Manual (Page 6)

QLQ, QLQC USER INSTRUCTIONS ENGLISH 87900027 – 06/14
Page 6 of 61
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.
DRAIN THE PUMP AND ISOLATE PIPEWORK
BEFORE DISMANTLING THE PUMP
The appropriate safety precautions should be taken
where the pumped liquids are hazardous.
FLUORO-ELASTOMERS (When fitted.)
When a pump has experienced temperatures over
250 ºC (482 ºF), partial decomposition of fluoro-
elastomers (example: Viton) will occur. In this
condition, these are extremely dangerous and skin
contact must be avoided.
HANDLING COMPONENTS
Many precision parts have sharp corners and the
wearing of appropriate safety gloves and equipment
is required when handling these components. To lift
heavy pieces above 25 kg (55 lb.) use a crane
appropriate for the mass and in accordance with
current local regulations.
GUARDS MUST NOT BE REMOVED WHILE
THE PUMP IS OPERATIONAL
The unit must not be operated unless coupling guard
is in place. Failure to observe this warning could
result in injury to operating personnel.
THERMAL SHOCK
Rapid changes in the temperature of the liquid within
the pump can cause thermal shock that can result in
damage or breakage of components and should be
avoided.
APPLYING HEAT TO REMOVE IMPELLER
There may be occasions when the impeller has
become difficult to remove due to products that are
corrosive in nature.
If you elect to use heat to remove the impeller, it must
be applied with great care and before applying heat,
ensure any residual hazardous liquid trapped
between the impeller and pump shaft is thoroughly
drained out through the impeller keyway to prevent
an explosion or emission of toxic vapor.
Impeller design varies and so are the heat, applying
location and the duration of heat application. Contact
nearest Flowserve Service Center for help.
HOT (and cold) PARTS
If hot or freezing components or auxiliary heating
supplies can present a danger to operators and
persons entering the immediate area action must be
taken to avoid accidental contact. If complete
protection is not possible, the machine access must
be limited to maintenance staff only, with clear visual
warnings and indicators to those entering the
immediate area. Note: bearing housings must not be
insulated and drive motors and bearings may be hot.
If the temperature is greater than 80 °C (175 °F) or
below -5 °C (20 °F) in a restricted zone, or
exceeds local regulations, action as above shall
be taken.
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.
For ATEX both electrical and non-electrical
equipment must meet the requirements of European
Directive 94/9/EC. Always observe the regional legal
Ex requirements eg Ex electrical items outside the EU
may be required certified to other than ATEX eg IECEx,
UL.
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
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 ATEX 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 affects in the motor and the
ATEX Certification for the motor shall state that it
covers the situation where electrical supply is from
the VFD. This particular requirement still applies even
if the VFD is in a safe area.