Richter GR/F Series, Installation And Operating Manual

Page: 10 / 20

Series GR/F
Page 10
9550-025-en Revision 14
TM 10477 Edition 05/2022
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.
♦
To prevent leaks, a regular check of the connec-
tion screws should be made in line with the operat-
ing requirements.
For tightening torques, see
Section 1.2 .
9.1 Dismantling
9.1.1 Replacing plug
♦
Remove cover screws 901/1, 936/1 (with DN 100
902/2, 936/1 , 920/3).
♦
Pull guide 801 with shank 808 and valve plug 204
out of the body 100 .
♦
DN 25-100
Pull round cord 522 out of the plug 204 with a pair
of pliers.
♦
Replacing the plug 204 .
♦
Check to see whether the seat 205 is still ok.
♦
If not: Replace . See Section 9.1.2 .
9.1.2 Replacing seat
A screw-in tool is required for assembling and
dismantling the seat
205 . The article numbers for the
individual nominal sizes are listed in Section 1.3 .
The new seat is to be carefully protected prior to
assembly. The sealing edge and the sealing surface
for the plug must not be damaged.
♦
Remove the upper part of the valve as described in
Section 9.1.1 .
♦
Screw the seat 205 out of the body with the Richter
screw-in tool. Right-hand thread.
♦
Carefully clean the sealing surface in the body 100
and check for
♦
If there is any damage, you can try to rework the
sealing surface.
♦
Screw the new seat 205 without lubricant into the
body using the Richter screw-in tool.
9.2 Assembly
♦
Assembly is performed in reverse sequence.
♦
Prior to assembly all parts are to be cleaned and
the plastic-lined parts checked for damage.
♦
Bolt body 100 and cover 106 together. Tighten the
screw fitting to a tightening torque in accordance
with
Section 1.2 in diametrically opposite se-
quence.
10 Drawing
10.1 Legend
100 Body
106 Cover
204 plug
205 Seat
244 plug with shaft
522 round cord
801 Guide
808 shank
901/1 Hex. screw
902/1 stud screw (DN 100)
920/1
hex. nut
936/1 toothed lock washer