Flowserve Guardian Sealless Metallic - Manual (Page 7)

GUARDIAN USER INSTRUCTIONS ENGLISH 71569212 08-11
Page 7 of 68 flowserve.com
The responsibility for compliance with the specified
maximum liquid temperature is with the plant
operator.
Temperature classification “Tx” is used when the
liquid temperature varies and the pump could be
installed in different hazardous atmospheres. In this
case the user is responsible for ensuring that the
pump surface temperature does not exceed that
permitted in the particular hazardous atmosphere.
Do not attempt to check the direction of rotation with the
coupling spacer fitted due to the risk of severe contact
between rotating and stationary components.
Where there is any risk of the pump being run against a
closed valve generating high liquid and casing external
surface temperatures fit an external surface
temperature protection device.
Avoid mechanical, hydraulic or electrical overload by
using motor overload trips or a power monitor and
perform routine vibration monitoring.
In dirty or dusty environments, make regular checks
and remove dirt from areas around close clearances,
bearing housings and motors.
Additional requirements for self-priming casing
pumps
Where the system operation does not ensure control of
priming, as defined in the User Instructions, and the
maximum permitted surface temperature of the T Class
could be exceeded, the user shall install an external
surface temperature protection device.
1.6.4.4
Preventing the build up of explosive
mixtures
ENSURE PUMP IS PROPERLY FILLED AND
VENTED AND DOES NOT RUN DRY
Ensure that the pump and relevant suction and
discharge piping is totally filled with liquid at all times
during the pumps operation so that an explosive
atmosphere is prevented. In addition, it is essential
to make sure that any heating and cooling systems
are properly filled.
If the operation of the system can not avoid this
condition fit an appropriate dry run protection device
(example: liquid detection or a power monitor).
To avoid potential hazards from fugitive emissions of
vapor or gas to atmosphere, the surrounding area
must be well ventilated.
1.6.4.5 Preventing sparks
To prevent a potential hazard from mechanical
contact, the coupling guard must be non-sparking for
category 2 equipment.
To avoid the potential hazard from random induced
current generating a spark, the baseplate must be
properly grounded.
Avoid electrostatic charge. Do not rub non-
metallic surfaces with a dry cloth; ensure the cloth is
damp.
For ATEX the coupling must be selected to comply
with 94/9/EC. Correct alignment must be maintained.
Additional requirements for pumps on non-
metallic baseplates
When metallic components are fitted on a non-
metallic baseplate they must be individually earthed.
1.6.4.6
Preventing leakage
The pump must only be used to handle liquids
for which it has been approved to have the correct
corrosion resistance.
Avoid entrapment of liquid in the pump and associated
piping due to closing of suction and discharge valves,
which could cause dangerous excessive pressures to
occur if there is heat input to the liquid. This can occur if
the pump is stationary or running.
Bursting of liquid containing parts due to freezing
must be avoided by draining or protecting the pump
and auxiliary systems.
Where there is the potential hazard of a loss of
external flush, the fluid must be monitored.
If leakage of liquid to atmosphere can result in a
hazard, install a liquid detection device.
1.6.4.7
Maintenance to avoid a hazard
CORRECT MAINTENANCE IS REQUIRED TO
AVOID POTENTIAL HAZARDS WHICH GIVE A
RISK OF EXPLOSION
The responsibility for compliance with maintenance
instructions is with the plant operator.
To avoid potential explosion hazards during
maintenance, the tools, cleaning and painting
materials used must not give rise to sparking or