Samson 373 Series User Manual

50 EB 8384-2 EN
Mounting and start-up
5.4 Attachment according to
IEC60534-6
Î Requiredmountingpartsandaccesso-
ries:Table4onpage25.
Î Observetraveltablesonpage28.
Î RefertoFig.8
The positioner is attached to the control valve
usingaNAMURbracket(10).
1. Screw the two bolts (14) to the bracket
(9.1) of the stem connector (9), place the
follower plate (3) on top and use the
screws (14.1) for fastening.
Actuator sizes 2800cm² and 1400cm²
with 120mm travel:
− For a travel of 60 mm or smaller,
screw the longer follower plate (3.1)
directly to the stem connector (9).
− Foratravelexceeding60mm,mount
thebracket(16)rstandthenthefol-
lower plate (3) to the bracket togeth-
er with the bolts (14) and screws
(14.1).
2. MountNAMURbracket(10)tothecon-
trol valve as follows:
− For attachment to the NAMUR rib,
use an M8 screw (11) and toothed
lock washer directly in the yoke hole.
− For attachment to valves with rod-
type yokes, use two U-bolts (15)
aroundtheyoke.AligntheNAMUR
bracket (10) according to the em-
bossed scale so that the follower
plate (3) is shifted by half the angle
rangetotheNAMURbracket(the
slot of the follower plate is centrally
alignedwiththeNAMURbracketat
mid valve travel).
3. Mount connecting plate (6) or pressure
gauge bracket (7) with pressure gauges
on the positioner, making sure the two
seals (6.1) are seated properly.
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 once all the way as far as it
will go in both directions.
5. PlacepositionerontheNAMURbracket
in such a manner that the follower pin
(2) rests in the slot of the follower plate
(3, 3.1). Adjust the lever (1) correspond-
ingly.
ScrewthepositionertotheNAMUR
bracket using its two fastening screws.
10
11
1
1
14.1
3
3.1
16
15
14
1
1.2
1.1
2
9.1
9
6.1 6 7 8
Attachment to rod-type yoke:
rodswith20to35mmdiameter
Attachment to
NAMURrib
Additional bracket for
actuatorswith2800cm²
andtravel≥60mm
XL and L lever
1 Lever
1.1 Nut
1.2 Disk spring
2 Follower pin
3 Follower plate
3.1 Follower plate
6 Connecting plate
6.1 Seals
7 Pressure gauge bracket
8 Pressure gauge
mounting kit
9 Stem connector
9.1 Bracket
10 NAMURbracket
11 Screw
14 Bolt
14.1 Screws
15 U-bolt
16 Bracket
NOTICE
!
Only use the connecting plate (6) included in the accessories to
connect supply and output.
Never screw threaded parts directly into housing.
Fig.8: Attachment according to IEC60534-6 (NAMUR)

Samson 373 Series Specifications

General

Brand	Samson
Model	373 Series
Category	Valve Positioners
Language	English