Richter HVR Series Bellows-Sealed Valves - Manual (Page 11)

Installation and Operating Manual
Series HV, HVR
9520-050-en Revision 01
TM 6128 MPE/Wm Page 11 Edition 04/2005
DN 80 and DN 100 (3" and 4")
Unscrew groove nuts 509/1 off the handwheel hub
230.
Now proceed as described under DN 25 - DN 65.
8.2 Assembly
8.2.1 Installing plug
Screw bellows 206 without lubricant onto the stem
855 and tighten by hand.
Check whether the new plug 204 fits into the seat
205. Make sure that neither the seat nor the plug
is damaged.
Screw plug 204 with plug 204 onto the bellows
without lubricant and tighten by hand.
Press round cord 522 into the
plug 204 apart from 10 mm.
This facilitates the next disman-
tling operation.
Install stem 855 with bellows 206 and plug 204
without lubricant into the cover 106.
Carefully lower upper part into the body.
Install cover screw fittings. For tightening torques,
see Section 1.3.
8.2.2 Replacing seat
A screw-in tool is required for the assembly and
dismantling of the seat. The article numbers for the
individual nominal sizes are listed in Section 1.6.
The new seat must 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 8.1.1.
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 damage.
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. For tightening
torques, see Section 1.3.
The further assembly procedure is the same as
described in Section 8.2.1.
approx.10 mm