salmson NEX, Installation And Operating Instructions Manual

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ENGLISH
16
8.5 SHUTDOWN
Before the pump is stopped close the discharge isolating valve.
Ensure that the pump runs in that condition no more than few
seconds.
When the pump has come to a standstill : close the suction isolating
valve. If the pump is equipped with auxiliary systems such as a quench,
heating system, flushing, external lubrication, etc … it must be closed at
the last step.
If temperature is likely to drop below freezing point, pump casing
and auxiliary connected systems should be completely drained or
otherwise protected. For prolonged shut-downs an adapted rust
protective coating should be applied to the inside and outside of the
pump.
Pumping explosive, toxic or polluting fluids : make sure that all
necessary actions were taken to avoid the creation of a hazard for
people or environment during drainage operations.
Products which are sent back to Salmson must be drained and
cleaned. Pumped fluid should be completely removed from the
pump.
9 MAINTENANCE
9.1 GENERAL INFORMATION
Only properly trained and skilled staff should undertake
maintenance operations.
Only authorized personnel should undertake maintenance on
ATEX certified equipments. Make sure to avoid creation of
explosion hazard while proceeding to maintenance in a ATEX zone.
All technical documents delivered with the pump should be known
and should be available near the pump.
The maintenance crew should be informed about the risks linked to the
use of the pump and to the pumped fluids before they can start working
on the equipment (dangerous products, fluid and pump temperature,
pressurized parts, …). They should be equipped with all appropriated
individual safety protections (glasses, gloves, …) and should respect local
industrial and security rules.
Pump contains a part of pumped fluid even when it is at a
standstill. Drain and flush pump casing with care before starting
pump disassembly.
Appropriate lifting devices should be available to help personnel moving
heavy loads.
The maintenance area must be clearly identified. Install warning boards
with the words « WARNING : machine under repair ! » on the pump and
on the control cabinet.
Any work on the machine must be performed when pump is
stopped. Prior to any maintenance or repair work the motor
should be electrically isolated and secured against uncontrolled start.
Lock the main switch open and disconnect circuit breaker. Withdraw the
fuses if any.
WARNING : electrical equipments that must be powered on during the
maintenance work or pressurized equipments must be clearly identified.
End of maintenance operations : all protective parts that were removed
before maintenance should be reinstalled and all security devices should
be reactivated. Pump surrounding area should be cleaned.
9.2 MAINTENANCE AND PERIODIC
INSPECTIONS SCHEDULE
It is recommended to build up a maintenance and inspection plan
to ensure a reliable use of pump and to reduce malfunctions
hazards. Following check points should be included in this maintenance
plan :

Check state and working of securities and auxiliary systems,

Check and adjust gland packing (if any) for visible leakage,

Check for any leaks from pump gaskets and flanges seals,

Check lubricant level and aspect of oil (oil lubricated bearings) in
bearing bracket,

Check running time and replacement frequency of lubricants / ball
bearings,

Check the bearing bracket housing surface temperature on ball
bearings area,

Check dirt and dust is removed from pump and motor ,

Check coupling alignment (depending on pump variant),

Check if there is unusual noises (cavitations, hissing, purring, …) or
excessive vibrations.
Check point Periodicity
State of the auxiliary systems Depends on equipment type. See
dedicated equipment IOM
Motor See manufacturer IOM
Shaft sealing Weekly
Leaks from gaskets Weekly
Oil level and grease quantities Daily / Weekly / Monthly
Lubricants (ball bearings) Replacement frequency according ball
bearing type and shaft speed
Bearings surface temperature Monthly
Cleaning Twice a year
Alignment and coupling wear Twice a year
Noise, vibrations Monthly
Anchoring quality Yearly
Those frequencies are given for information only. They could be used as
a basis to the creation of a maintenance plan when starting a new
installation. Depending on installation conditions and use, the
periodicity will be shortened or prolonged.
9.2.1 LUBRICATIO N
Recommended oil lubricants :
(*) ATTENTION : Note that it normally takes 2 hours for bearing
temperature to stabilize and the final temperature will depend on the
ambient temperature, motor speed, fluid temperature and pump size.
Always check the oil grade when the ambient temperature is less than -5
ºC. Ensure that oil pour point is at least 15°C below ambient
temperature. Then check maximum temperature allowed for the chosen
oil type.ISO VG 46 oil is generally selected as an initial lubrication
schedule.
Recommended grease lubricants :
(*) NLGI 2 is an alternative grease and is not to be mixed with other
grades.
(**)Standard pre-packed grease for fitted antifriction bearings.
Below -20°C ambient temperature, specific grease may be required and
Shell Aeroshell 22 is normally required for the minimum ambient
temperature of -45°C.
Bearing bracket sizes and grease/oil capacities :