UNIREX Pump - Manual (Page 7)

MARK 3 USER INSTRUCTIONS ENGLISH 71569102 08-06
Page 7 of 68 flowserve.com
In addition, it is essential to make sure that seal
chambers, auxiliary shaft seal systems and any
heating and cooling systems are properly filled.
If the operation of the system can not avoid this
condition it is recommended that you fit an
appropriate dry run protection device (for 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.
To avoid the potential hazard from random induced
current generating a spark, the earth contact on the
baseplate must be used.
Avoid electrostatic charge: do not rub non-metallic
surfaces with a dry cloth ; ensure cloth is damp.
The coupling must be selected to comply with 94/9/EC
and 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
Pumps with mechanical seal. 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 a seal
barrier fluid or external flush, the fluid must be monitored.
If leakage of liquid to atmosphere can result in a
hazard, the installation of a liquid detection device is
recommended.
1.6.4.7 Maintenance of the centrifugal pump 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 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.)
1.7 Name plate and safety labels
1.7.1 Nameplate
For details of nameplate, see the Declaration of
Conformity and section 3.
1.7.2 Safety labels
Oil lubricated units only:
DurcoShield TM (Splash/Shaft Guard) only: