Grundfos MTS 140, Инструкция по установке и эксплуатации

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10.1.3 Shaft seal
MTS pumps are available with two types of shaft
seal:
•
mechanical shaft seal
• shaft seal ring.
Mechanical shaft seals are subject to natural wear
which strongly depends on the operating conditions.
Therefore, general statements regarding their
service life cannot be made.
Both mechanical shaft seals and shaft seal rings
have functional leaks. In the event of major leaks,
replace the shaft seal and its auxiliary seals.
10.2 Repairing the product
10.2.1 Dismantling
Before dismantling the pump, make sure the
following requirements have been fulfilled:
•
The pump has been depressurized.
• The discharge-side isolating valve has been
closed.
• The pump is completely empty, flushed and
decontaminated.
• All electrical connections have been
disconnected and the motor cannot be
accidentally switched on again.
• Pump has cooled down.
• The coupling guard has been dismounted.
• The spacer has been removed (if coupling is a
spacer coupling).
• Auxiliary systems have been shut down,
depressurized and emptied.
• Pressure gauge lines have been dismounted.
Observe the following during dismantling:
•
Mark the precise orientation and position of all
components before dismounting them.
• Dismantle components concentrically without
tilting them.
• For dismantling of the pump, see appendix,
section
Constructional drawings .
10.2.2 Re-installing
Install the components concentrically without tilting
them, in accordance with the markings made.
Observe the following during re-installation:
•
Always replace lost or damaged screws with
screws of the same strength class.
• Replace worn parts with genuine spare parts.
• Replace seals with new seals of the same
materials, inserting them in such a way that they
are unable to rotate.
• Tighten screws and nuts to the prescribed
tightening torques. See section
3.1.12 Tightening
torques .
• Clean all parts. Do not remove any markings.
• Assemble the pump. See Appendix, section
Constructional drawings .
• Install the pump in the system. See section
3. Installing the product .
10.3 Ordering spare parts
Parts which can be replaced can be found in the list
in section
10.4 Position numbers .
Please have the following information ready when
ordering spare parts:
•
pump type
• model and serial number
• production year and week
• part number
• designation
• quantity.
For trouble-free replacement in the event of faults,
we recommend keeping a spare pump available on
site.