Flowserve LPNV Worthington - Manual (Page 5)

LPNV USER INSTRUCTIONS ENGLISH 87900031 – 06/14
Page 5 of 48
HAZARDOUS LIQUIDS
When the pump is handling hazardous liquids care
must be taken to avoid exposure to the liquid by
appropriate sitting 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 seal 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, which
can result in damage or breakage of components
and should be avoided.
NEVER APPLY HEAT TO REMOVE
IMPELLER
Trapped lubricant or vapor could cause an
explosion.
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
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 affects 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.