Flowserve MARK 3 GROUP 4 - Manual (Page 8)

MARK 3 GROUP 4 USER INSTRUCTIONS ENGLISH 71569286 08-12
Page 8 of 48 flowserve.com
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1.6.4.5 Preventing sparks
To prevent a potential hazard from mechanical
contact, the coupling guard must be non-sparking.
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 cloth is damp.
For ATEX, the coupling must be selected to comply with
94/9/EC. Correct coupling alignment must be
maintained.
Additional requirement for metallic pumps on non-
metallic baseplates
When metallic components are fitted on a non-metallic
baseplate they shall be individual grounded.
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
ancillary systems.
Where there is the potential hazard of a loss of a seal
barrier fluid or 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 the 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 adversely affect
the ambient conditions. Where there is a risk from
such tools or materials, maintenance must be
conducted in a safe area.
It is recommended that a maintenance plan and
schedule is adopted. (See section 6,
Maintenance.