Maintenance; Setting The Travel Stop; Dismantling; Maintenance Of The Upper Section - Richter RSS/F Series Installation And Operating Manual

Series RSS/F
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.
 The maintenance staff can decide whether the valve is
dismantled from the pipe or not for maintenance
work. In both cases Section 7.3 is to be observed.
 It is also up to the maintenance staff to decide
whether the actuator or other accessories are disman-
tled for the maintenance work.
 Section 9.4 is to be observed for re-assembly of the
actuator.
 To prevent leaks, a regular check of the connection
screws should be made in line with the operating
requirements.
For torques see Section 1.3.
9.1

Setting the travel stop

To ensure the valve closes tight, a distance between the
travel stop 508 and cover 106 must be observed:
DN 15 – 50 (½".– 2")
DN 65 – 150 (2½" – 6")
If these distances are not correct, the travel stop must be
reset:
 Close valve.
 Remove protection bellows 687.
 Move travel stop 508 to the correct distance.
 Tighten lock nut 920/2.
9560-060-en Revision 15
TM 9549 Edition 07/2016
Fig. 1
: 0,5 mm
: 1,0 mm
9.2

Dismantling

9.2.1 Maintenance of the upper section

This mainly involves the following work:
 Replacing the plug 204.
 Replacing the bellows 206.
 Inspecting the metal parts of the upper section and
replacing them if necessary.
The entire dismantling and assembly procedure is
described below. If only partial assembly is required, this
can be derived from the text.

9.2.2 Dismantle valve

 Move plug 204 into open position if the actuator 850
is mounted.
 Remove cover nuts and screws 901/1, 1x936/1,
1x936/2 and 920/2 (DN 100 902/2, 1x936/1,
1x936/2, 920/2 and 920/3).
 Pull cover 106 vertically out of the body 100.
 Remove protective bellows 687, travel stop 508 and
packing nut 404.
 Remove valve stem 800 with bellows 206 and plug
204 below.
 Clamp valve stem 800 in a vice with protective jaws.
 Pull round cord 522 out of the plug 204 with a pair of
pliers.
 Unscrew plug 204 by hand or with a strap wrench.
Right-hand thread.
 Unscrew bellows 206 by hand or with a strap
wrench. Right-hand thread.
 With the heavy-duty bellows 206 the support rings
231 and support disc 232 cannot be removed.

9.2.3 Replace bellows

 Only remove packing rings 402/1 and thrust ring 405
if necessary.
 Only remove guide rings 302 if necessary. Use a
sharp tool, e.g. scribing iron or screwdriver.
 With DN 80 and DN 100 (3" and 4"):
only remove guide 801 if necessary. Press in the
direction of the stuffing box using a press.
Check to see whether the seat 205 is still ok.
If not: replace. See Section 9.3.
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