Viking Pump TSM285: Classic+ Lobe Pump - Manual (Page 8)

SECTION TSM 285 ISSUE A PAGE 8 OF 36
3.5 SHUTDOWN PROCEDURE
When shutting the pump down, stop pump, close
both the suction and discharge valves and ensure
that the necessary safety precautions are taken:
- The prime mover power source has been
isolated.
- If installed, pneumatically operated integral
relief valve has been depressurized.
- Flushed product seal auxiliary services have
been isolated and depressurized.
- Pump head and piping have been drained and
purged.
- Before undertaking any work on the pump refer
to sections 4, 5, 6 and 7.
3.6 ROUTINE MAINTENANCE
- Check oil levels regularly.
- Change the oil every 12 months or 3000 operating hours,
whichever is the sooner.
- For lubricant capacities and grades refer to section 8.3.
3.7 HEATING AND COOLING
JACkETS
See Figure 9 and Figure 10.
The Classic+ can be supplied with a jacketed head and casing
for circulation of a heating/cooling media.
The jacketed head and casing ports are strategically positioned
such that the required thermal effect acts on the pumping
chamber.
The pressure rating of the Classic+ series jacketed
head and casing is 3 Bar (50 psi) and this should
not be exceeded without consulting Viking Pump
or your local Viking Pump distributor.
Heating/cooling of the pump head is used to maintain, rather
than increase/decrease the temperature of the pumped media
and should be used as part of a complete system where suction
and discharge lines and vessels are also heated/cooled.
Where heating/cooling devices are employed, the heating/
cooling media should be circulated 15-20 minutes prior to pump
start-up and should be allowed to continue for a similar period
of time after the pump has been shut down. Where an in-line
cleaning cycle is employed as part of the process, then the
heating/cooling media should continue to be circulated during
the cleaning cycle.
3.4 Start Up Procedure
- Check that all piping and associated equipment
are clean and free from debris and that all pipe
connections are secure and leak free.
- For pumps fitted with flushed product seals
check all auxiliary services are in place
and connected and provide sufficient flow
and pressure for flushing purposes, refer to
section 7.0.
- Ensure lubrication is provided for both pump
and drive. The Classic+ is shipped without oil
as standard and should be filled to the level
of the oil sight glass - refer to section 8.3 for
pump oil capacities and grades.
- If an external relief valve is incorporated in the
system, check that it is set correctly. For start up
purposes, it is considered good practice to set
the relief valve lower than the system design
pressure. On completion of start up, the relief
valve should be reset to the required setting
for the application. The required setting should
never exceed the lower of either the pumps
maximum pressure rating or the system design
pressure. For setting integral relief valves refer
to sections 3.8.1 and 3.8.2.
- Be sure both suction and discharge valves are
fully opened and that pipe work is free from
all obstructions. The Classic+ is a positive
displacement type pump and should therefore
never be operated against a closed valve as this
would result in pressure overload, resulting in
damage to the pump and possibly the system.
- Make sure that the drive shaft rotation is correct
for the direction of flow required. See Figure 8.
- Be sure product is available in the suction
vessel before starting the pump. This is very
important for pumps fitted with un-flushed
product seals, as these sealing arrangements
must never be allowed to run dry.
- Before beginning operation, it is considered good practice
to momentarily start/stop the pump to check the direction of
rotation and ensure that the pump is free of obstructions.
Once this has been carried out, begin operation keeping a
visual check on suction and discharge pressure gauges and
monitor the pump temperature and absorbed power where
possible.
figure 8
Rotation Against Suction and Discharge
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