Richter RSS/F Series Bellows-Sealed Control Valves - Manual (Page 16)

Series RSS/F
Page 16
9260-060-en Revision 03
TM 7168 Edition 06/2008
9.3.1 V-plug
In contrast to the normal valve plug, the seat
diameter is smaller than the V-plug diameter.
The V-plug is pushed firmly over the resilient sealing
lip of the valve seat. This seals the plug.
9.4 Mounting the actuator
Assembly of the actuator varied depending on the
make and type.
The operating manuals for actuators, positioners
and other accessories must be observed.
As regards the process valve, special attention is to
be paid to the following:
The stem 800 must under no circumstances by
turned to adapt to the coupling 804. If turned
counterclockwise, it would otherwise turn out of the
metal core of the bellows 206.
The actuator manufacturers prescribe that the
valve is moved into the closed position when the
coupling 804 is mounted. In this closed position
many bellows are pre-tensioned in the valve. They
would possibly open the valve again. Therefore,
the stem 800 is to be kept in the closed position
when the coupling 804 is mounted.
The safety function, i.e. opening or closing
of the valve if the air or power fails, must be
checked.
10 Drawings
10.1 Legend
100 body
106 cover
204 plug
205 seat
206 bellows
206 heavy-duty bellows
includes:
231 support ring
232 support disc
302/x guide ring
402/1 packing ring
404 packing nut
405 thrust ring
508 travel stop
510 bracket
516 yoke
522 round cord
523 stroke index
550 disc
687
protective bellows
includes:
509/1 groove nut
937/1 clip
954/1 snap ring
800 valve stem
801 guide
(DN 80, 100, 3", 4")
804 coupling
850 actuator
901/1 hex.
screw
(DN 15 to 80, ½" to 3" )
902/1 stud screw
(DN 100, 4")
917/1 screw-in pipe connector
920/x hex. nut
936/x tooth lock washer
938/1 hex. head screw plug