Richter GSO Series Strainers - Manual (Page 9)

Series GSO
Page 9
9540-061-en Revision 10
TM 8361 Edition 10/2011
8 Malfunctions
Clogged strainer basket
Remove and dismantle entire strainer basket,
clean or replace and install again.
See Section 9.1 and 9.2.
Strainer basket sticks
If functional parts swell owing to the medium, it is
very difficult to remove the strainer basket.
If dismantling is not possible by pulling the unit
upwards, remove cover 106 and push the strainer
basket upwards from below.
Dismantling by pushing downwards is not possible
owing to the anti-torsion insert 219.
Flange connection ball valve/pipe is leaking
Retighten the flange screws to a tightening torque
according to Section 1.2. If this does not remedy
the leak, the recommended torques may be
exceeded by 10%.
If this also fails to stop the leak, dismantle and
inspect the valve.
9 Maintenance
All repair work is to be performed by qualified
personnel using the appropriate tools.
For the arrangement, designation and item
numbers of all parts of the valve, see Section 10.
Spare parts are to be ordered with all the details in
acc. with the valve identification.
Only original spare parts may be installed.
Make sure that the strainer is empty when
work is performed on it.
To prevent leaks, a regular check of the connection
screws should be made in line with the operating
requirements.
For tightening torques, see Section 1.2.
9.1 Dismantling of the strainer
basket
Observe shutdown procedure in Section 7.3.
Undo cover fittings 902/1, 936/1 and 920/1 and
remove upper cover 107 and cover disc 115.
Screw ring bolt 900/1 into the strainer basket 220
and pull the strainer basket with the seal ring 407
up and out.
If the strainer basket is cleaned or replaced when
the valve is installed, attention must be paid when
opening to residual medium in the plant.
Observe safety regulations when handling
the medium.
Mark position of the inner and outer tubes in
relation to the round cord 522
Pull round cord 512 out of the strainer basket
bottom 218.
Pull out outer tube 234.
The filter web 216 or the entire strainer basket 220
can now be cleaned or replaced.
For cleaning purposes, only use soft and/or liquid
cleaning materials.
9.2 Installation of the strainer
basket
Insert seal ring 407 into the inner tube 222.
Place the filter web 216 (new or cleaned) with an
overlap over the inner tube 222.
Place the outer tube 234 over the inner tube with a
rotary movement. Do not turn against the overlap!
Insert the inner and outer tubes together into the
strainer basket bottom 218.
Insert the round cord 522 again in accordance with
the markings.
Insert the complete strainer basket into the strainer
basket support 217. Pay attention to anti-torsion
insert 219.
Screw the upper cover 107 and cover disc 115
tight with the stud screw 902/1, a toothed lock
washer 936/2 and hex. nut 920/1.
For tightening torques, see Section 1.2.
9.3 Option Draining
Instead of the cover 106 a transition cover 109 is used
with this option.
A valve (DN 15 as standard or other DN on request)
can be connected to it.
See sectional drawing in Section 10.3.