Air Supply; Maintenance Work; Replacing The Mechanical Seal - salmson LRE Serie Manual De Instalación Y Puesta En Servicio

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10.1

Air supply

10.2

Maintenance work

10.2.1 Replacing the mechanical seal

Replacement
Fig. 38: Bleed valve
85
DANGER! Risk of fatal injury!
Failure to install safety devices on the module cover or near the
coupling can cause electrical shock or contact with rotating parts,
potentially resulting in life-threatening injuries.
• After maintenance, all safety devices such as module covers or
coupling covers that were removed must be reinstalled!
DANGER! Risk of burns or freezing to the pump when body parts
come into contact with the pump!
Depending on the pump or system operating conditions (fluid tem-
perature), the entire pump can become very hot or very cold.
• Keep a safe distance during operation!
• In the case of high water temperatures and system pressures, allow
the pump to cool down before all work.
• Always wear protective clothing and gloves when working.
The air supply to the motor housing must be checked at regular inter-
vals. In case of contamination, ensure that an air supply is re-estab-
lished in order to allow the both the motor and the module to cool
sufficiently.
DANGER! Risk of fatal injury!
Falling pumps or pump parts may result in life-threatening injuries.
• When performing installation work, protect the pump components
against falling.
During the running-in period, a minor amount of dripping is to be
expected. A visual inspection should be performed from time to time,
however. If there is clearly detectable leakage, the seal must be
changed.
Dismantling:
• Disconnect the system from the power supply and secure it against
being switched back on again
• Close the check valves in front of and behind the pump.
• Disconnect the power cables if the cable for dismantling the drive is
too short.
1 • De-pressurise the pump by opening the bleed valve (Fig. 38, Item 1).
DANGER! Risk of scalding!
Due to high fluid temperatures there is a risk of scalding.
• If the fluid is hot, allow it to cool down before performing any work.
• Release the pressure measuring lines of the differential pressure sen-
sor.
• Remove the motor with impeller and shaft seal from the pump hous-
ing by undoing the flange screws (Fig. 5, Item 4).
• Remove the circlip (Fig. 5, Item 1.12) from the shaft.
• Pull the impeller (Fig. 5, Item 1.11) off the shaft.
Pompes Salmson 04/2011