Adjustment Of The Test Pressure; Important Notes On Dismantling / Installation; Replacement Of Components; Dismantling Of The Plug And Seat - Richter GUT/F Series Installation And Operating Manual

Series GUT/F
9.4 Adjustment of the test pres-
sure
♦ 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 special-
ised 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

9530-021-en Revision 16
TM 10477 Edition 05/2022

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!
♦ 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 is to 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.
Fig. 8
12
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