Samson 3767 - Page 16

16 EB8355-2EN
Mountingoncontrolvalves
1. Fastentheclamp(1.2)totheactuator
stem, making sure that the fastening
screw rests in the groove of the actuator
stem.
2. Fastentheassociatedpick-upleverD1or
D2(with355/700cm²actuators)tothe
feedbackleverofthepositioner.
3. Securetheintermediateplate(15)with
the gasket facing towards the actuator
yoke.
4. Positionthepositionersuchthatthepick-
upleverslidesinlineoverthepin(1.1)
oftheclamp(1.2).Fastenthepositioner
totheintermediateplate(15).
5. Mountcover(16).
6. Check whether the correct range spring
hasbeeninstalledaslistedinTable4.
Range spring 1 is installed as standard.
If necessary, replace it with range spring
2includedintheaccessoriesandxitat
theouterhook-inholes.
Actuatorswith240,350,355,and
700cm²diaphragmareas
7. Makesurethatthetipofthegasket(16)
projecting from the side of the connec-
tionblock(Fig.3,middle)ispositioned
tomatchtheactuatorsymbolfortheac-
tuator'sfail-safeaction"actuatorstem
extends" or "actuator stem retracts".
If this is not the case, unscrew the three
fastening screws and lift off the cover.
Turnthegasket(16)by180°andre-in-
sert it.
Theoldconnectionblockversionrequires
theswitchplate(13)tobeturnedtoalign
theactuatorsymbolwiththearrowmark-
ing.
8. Placetheconnectionblockwiththeasso-
ciated gaskets against the positioner and
the actuator yoke. Fasten it using the
screw.
Foractuatorswithfail-safeaction"actua-
tor stem retracts", additionally mount the
external signal pressure pipe.
Actuatorwith120cm²diaphragmarea
The signal pressure is transmitted to the dia-
phragmchamberovertheswitchoverplate
(Fig.3andFig.4,bottom).
7. Removescrewplugonthebackofthe
positioner(Fig.5)andsealthesidesig-
nal pressure output with the stopper in-
cluded in the accessories.
8. Mount the positioner so that the hole in
theintermediateplate(15)coversthe
seal in the hole of the actuator yoke.
9. Align the switchover plate with the corre-
spondingactuatorsymbol.Fastenitto
the actuator yoke.
NOTICE
If a solenoid valve or a similar device
is additionally mounted onto a
120cm² actuator, do not remove the
M3 screw plug at the back of posi-
tioner. In this case, the signal pres-
sure must be transmitted from the sig-
nal pressure output to the actuator
over an additional connecting plate
(Table2). The switchover plate is not
used in this case.