Richter GUT/F Series Overflow Valves - Manual (Page 12)

Series GUT/F
Page 12
9530-071-en Revision 10
TM 8361 Edition 10/2011
9.4 Adjustment of the test
pressure
Unscrew cap 207.
Undo groove nut 509/1.
Adjust the spring tension with the straining screw
581 to the specified test pressure.
Counter straining screw 581 with the groove nut
509/1
Check test pressure.
Screw on cap 207 and tighten.
Have valve lead-sealed.
The data specified in the test certificates are to be
observed.
9.5 Important notes on disman-
tling / installation
First undo the straining screw 581; the
valve plug 204 is relieved!
Then undo the screws between cover flange 105
and body 100.
The seat and plug could otherwise be destroyed.
Read the precise instructions in Section 9.6.
Always replace the seat and plug pairwise and
always rework them completely.
Reworking of the seat and plug requires specia-
lised knowledge.
It is therefore recommended to have this work
carried out by the manufacturer.
After dismantling, check all parts for wear and
damage.
Observe sectional drawings in Section 10.
9.6 Replacement of components
Fig. 8
9.6.1 Dismantling of the plug and seat
Unscrew cap 207.
Undo groove nut 509/1.
Undo straining screw 581.
Do not turn the entire stem 800! There is a risk of
the insert sleeve 308 being unscrewed out of the
bellows 206 or the folds being damaged!
Ø Loosen the bolts 901/1, 936/1, 936/2 and
920/1 from body 100 and cover flange 105 and lift
the cover flange with internals completely off.
Grip the bellows 206 in the reinforced section.
Unscrew and remove the plug 204.
Unscrew seat 205 from the body 100 with a special
wrench. See Section 1.3.
9.6.2 Installation of seat and plug
The new seat must be carefully protected prior to
assembly. The sealing edge and the sealing sur-
face for the plug must not be damaged. See Fig. 8.
All parts are to be thoroughly cleaned before
assembly.
Screw new or reworked seat 205 into the body
100 with a screwdriver.
Screw new or reworked plug 204 onto the bellows
thread hand-tight.
Hold the bellows 206 at the reinforced section.
First tighten the attachment nuts 920/1 hand-tight
and then with a torque wrench evenly and in
diametrically opposite sequence.
Adjust the spring tension with the straining screw
581 to the specified test pressure.
Counter straining screw 581 with the groove nut
509/1
Check test pressure.
Screw on cap 207 and tighten.
Have valve lead-sealed.