9.5.3 Reassembly of rotating element (Mechanical seal
version pump)
•
Procedure for rotor assembly for mechanical seal pump is
similar up to assembly of stuffing box bush (11)
•
Reassembly of mechanical seal is as follows:
•
Extreme cleanliness must be observed during installation,
and damage to the seal faces and mounting rings must be
avoided
•
Place the adjusting ring of mechanical seal at its pre marked
position
•
Place the grub screw (13) at its position on the adjusting
ring, but do not tight it yet
•
The O-rings may be oiled to reduce friction, during
installation of the seal. EP-rubber O-rings should not come
into contact with oil or grease; In this case lubrication with
glycerin or water is recommended.
•
Never cover the sliding faces with a lubricant as they must
be assembled completely dry, clean and dust free.
•
When pressing in stationery seals, make sure that the
pressure distribution is uniform. The O-ring must be fitted
using water or alcohol only.
•
Crowned drive pins must be replaced whenever the seal is
dismantled. During insertion of the stationary seats,
especially those of special carbon, care must be taken to
exert pressure evenly.
•
Now check the distance of seal as shown in the figure and
adjust its value as per the drawing
•
For rest parts follow the above explained procedure as per
gland pack version pump.
Location of mechanical seal of shaft
1) Pump casing
2) Stationary seat
3) Stationary seat
4) Gland plate
5) O-ring
6) Shaft
X. Mechanical seal
1.6 Abutment ring
1.7 Abutment ring fixing screw
9.5.4 Re-assembly of the pump (Mechanical seal version
pump)
•
For assembling mechanical seal version pump follow the
same procedure as done for gland pack version pump.
Difference in assembly of mechanical seal pump is as
follows:
•
Re-assembly of mechanical seal is as follows:
•
After placing the top half casing (1) at its position and
tightening the studs (29)
•
Slide in the gland plate (15) at its position and tight its studs
•
Now fix the flushing tubes (35) to the mechanical seal
gland plate (15)
•
Rest procedure is same as explained above for gland pack
version pumps.
NOTE:
•
While
assembling
stainless
steel
component,
molybdenum-disulphide paste should be applied to
prevent galling / seizure and also to facilitate easy removal
in future.
NOTE:
•
Change the gasket each time when the pump is opened.
9.6 Recommended Spare parts
In case of standard operation, we recommend the following
list of spare part regarding the period of functioning.
•
The maintenance of the split case pumps is easier than
other pump types. Then in order to facilitate this operation
we strongly recommended purchasing a batch of part with
the pump in order to reduce the shutdown timing.
•
It is strongly recommended to purchase the original spares
parts from <WILO>. In order to avoid any mistake, we invite
you to supply with any spare parts demand, the information
mentioned on the data plate of the pump and / or motor.
Installation
and
operating
instructions
WILO-Split
Case
Pumps
28
