GB
Form no.: L453147GB– revision 06/2013
7.
Service and maintenance
7.1
Checking the shaft seal
Check the pump's shaft seal for leaks on a regular basis. If the shaft
seal is leaking, replace it or its relevant parts as described below.
7.2
Replacing the shaft seal
The sectional drawing (page 3) shows the position and construction
of the shaft seal (applying both to ordinary seals and seals with
liquid/steam flushing).
To replace the shaft seal it is necessary to dismantle the pump.
Follow the steps described below and refer to the sectional
drawing (page 3).
1.
Disconnect the power supply in the motor isolator by removing
the fuses and disconnecting the cables.
2.
Turn off the steam and flushing liquid supply.
3.
Close the pump suction and discharge point and drain the pump
housing. If the pump is used for hot and/or aggressive liquids,
special precautions must be taken. In such cases, observe the
local regulations for personal protection when working with these
products.
4.
Open the clamp ring (item 9a) or the housing screws once the inlet
and outlet pipes have been properly isolated.
Dismantle the pump housing (item 1a, 1b) and remove the impeller
(item 4).
5.
Take the stationary seal face (item 5.6) installed in the back plate
(item 7a, 7b) out with your fingers.
6.
Remove the o-ring (item 5.5) from the stationary seal face.
7.
Use your fingers to remove the rotary seal face (item 5.7) fitted in
the impeller (item 4).
8.
Remove the o-ring (item 5.5) from the rotary seal face.
9.
Clean the chambers of the stationary and rotary seal face with air
or water.
9a
The rear stationary seal face (item 5.6) is mounted on the pressure
ring* (item 5.11). The rotary seal face (item 5.7) is mounted on the
shaft (item 11). These are removed in the same way as the front
seal components.
*The W+50/600 pump has 2 identical pressure rings.
Dismantling the pump
Dismantling the shaft seal
11
APV
