Richter GS Series Strainers - Manual (Page 9)

Series GS
Page 9
9540-060-en Revision 05
TM 6506 Edition 05/2006
8 Malfunctions
Clogged strainer basket
Remove and dismantle entire strainer basket,
clean or replace and install again.
See Sections 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.
Flange connection 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. Generally
recognised practice in mechanical engineering is to
be observed.
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 torques see Section 1.2.
9.1 Dismantling of the strainer
basket
Observe shutdown procedure in Section 7.3.
Undo cover screws 901/1 (DN 100 902/1) and
920/1 and remove cover 106 together with the
strainer basket compl. 220 and the integrated filter
web 216.
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.
Pull out outer tube.
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
Place filter web 216 over the inner tube with
overlapping.
Place the outer tube over the inner tube with a
rotary motion. Do not turn against the overlapping!
Insert the inner and outer tubes together into the
strainer basket bottom. Before doing so, check
once again to see whether the bores of the inner
and outer tubes are aligned. Otherwise, turn the
inner tube in relation to the outer tube.
Insert the round cord 522 again in accordance with
the markings.
Insert the strainer basket into the seat 205.
Screw cover 106 tight with a hex. screw 901/1
(DN 100 stud screw 902/1) and hex. nut 920/1.
For tightening torques, see Section 1.2.
9.3 Draining option
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 Section 10.2.