Samson 3730-1 Mounting And Operating Instructions page 25

Attachment to NAMUR rib (see Fig. 8)
− Required mounting parts and accesso-
ries: Table 4 on page 39
− Observe the travel table on page 15.
1. Series 240 Valves, actuator size up to
1400-60 cm²: Screw the two bolts (14) to
the bracket of the stem connector or di-
rectly 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)
onto the stem connector, place the fol-
lower plate (3) on top and use the screws
(14.1) to fasten it.
Mount the positioner on the NAMUR rib
as shown in Fig. 8.
2. For attachment to the NAMUR rib, fas-
ten the NAMUR connection block (10) di-
rectly 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
EB 8384-1 EN
Attachment to the control valve – Mounting parts and accessories
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 correctly
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 15.
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:
− Screw the follower pin (2) in the assigned
lever hole (pin position as specified in the
travel table). Only use the longer follow-
er 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.
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