Samson 373 Series User Manual

EB 8384-2 EN 55
Mounting and start-up
Attachment to NAMUR rib (see Fig.11)
Î Requiredmountingpartsandaccesso-
ries:Table5onpage25.
Î Observetraveltablesonpage28.
1. Series240 Valves, actuator size up to
1400-60cm²: Screw the two bolts (14)
to the bracket of the stem connector or
directly to the stem connector (depending
on the version), place the follower plate
(3) on top and use the screws (14.1) to
fasten it.
Type3251 Valve, 350 to 2800cm²:
Screw the longer follower plate (3.1) to
the bracket of the stem connector or di-
rectly to the stem connector (depending
on the version).
Type3254 Valve, 1400-120 to 2800
cm²: Screw the two bolts (14) to the
bracket (16). Fasten the bracket (16) on-
to the stem connector, place the follower
plate (3) on top and use the screws
(14.1) to fasten it.
MountthepositionerontheNAMURrib
asshowninFig.11.
2. For attachment to the NAMUR rib, fas-
tentheNAMURconnectionblock(10)
directly into the existing yoke bore using
the screw and toothed lock washer (11).
AlignthemarkingontheNAMURvalve
connection (on the side marked '1') to
50%travel.
For attachment to valves with rod-type
yokes using the formed plate (15), which
is placed around the yoke: screw the four
studsintotheNAMURconnectionblock
(10).PlacetheNAMURconnectionblock
on the rod and position the formed plate
(15) on the opposite side. Use the nuts
and toothed lock washers to fasten the
formed plate onto the studs. Align the
markingontheNAMURvalveconnec-
tion(onthesidemarked'1')to50%
travel.
3. Place the adapter bracket (6) on the po-
sitioner and mount using the screws
(6.1). Make sure that the seals are cor-
rectly seated. For positioners with air
purging, remove the stopper (5) before
mounting the positioner. For positioners
without air purging, replace the screw
plug (4) with a vent plug.
4. Select required lever size (1) M, L or XL
and pin position according to the actua-
tor size and valve travel listed in the trav-
eltableonpage28.
Should a pin position other than position 35
with the standard M lever be required or an
L or XL lever size be required, proceed as
follows:
− Fasten the follower pin (2) in the as-
signed lever hole (pin position as speci-
edinthetraveltable).Onlyusethelon-
ger follower pin (2) included in the
mounting kit.
− Place the lever (1) on the shaft of the po-
sitioner and fasten it tight using the disk
spring (1.2) and nut (1.1).Move lever

Samson 373 Series Specifications

General

Brand	Samson
Model	373 Series
Category	Valve Positioners
Language	English