Samson 3730-1 - Attachment According to VDI;VDE 3847-1

40 EB 8384-1 EN
Mounting and start-up
5.5 Attachment according to
VDI/VDE3847-1
Î RefertoFig.9
The following positioners with air purging of
the actuator's spring chamber can be at-
tachedaccordingtoVDI/VDE3847:
− Type 3730-1xx0000000x006000
− Type 3730-1xx0000000x007000
Type 3730-1xx0000000x000000 Positioner
without air purging of the actuator's spring
chamber can be attached according to VDI/
VDE3847.
This type of attachment allows the positioner
to be replaced quickly while the process is
running by blocking the air in the actuator.
The signal pressure can be blocked in the ac-
tuator by unscrewing the red retaining screw
(20) and turning the air blocker (19) on the
bottom of the adapter block.
Attachment to Type 3277 Actuator (see
Fig.9)
Î Required mounting parts and accesso-
ries:Table6onpage19
Mount the positioner on the yoke as shown
inFig.9.Thesignalpressureisroutedtothe
actuator over the connecting plate (12), for
actuators with fail-safe action "actuator stem
extends" internally through a bore in the
valve yoke and for "actuator stem retracts"
through external piping.
OnlytheY1portisrequiredforpositioner
attachment.TheY2portcanbeusedforair
purging of the spring chamber.
1. Place follower clamp (3) on the actuator
stem, align it and screw tight so that the
mounting screw is located in the groove
of the actuator stem.
2. 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.
3. Foractuatorswith355,700or750cm²,
remove the follower pin (2) on the M le-
ver (1) on the back of the positioner from
pin position 35, reposition it in the hole
for pin position 50 and screw tight.
Foractuators175,240and350cm²
with15mmtravel,keepthefollowerpin
(2) in pin position 35.
4. Insert the formed seal (6.2) in the groove
of the adapter bracket (6).
5. Insert the formed seal (17.1) into the
turnboard (17) and mount the turnboard
to the adapter block (13) using the
screws (17.2).
6. Mount the blank plate (18) to the turn-
board (17) using the screws (18.1).
Make sure that the seals are correctly
seated.
18.1
1
17.2
18
17
17.1
13.1
13
12
12.1
3
11.1
11
19
20
Exh.
1.1
1.2
1.1
1.2
1
2
6.2
6.1
6
4
6.3
5
1 Lever
1.1 Nut
1.2 Disk spring
2 Follower pin
3 Follower clamp
4 Screw plug
5 Stopper
6 Adapter bracket
6.1 Screws
6.2 Formed seal
6.3 Screws
11 Cover
11.1 Vent plug
12 Connecting plate
12.1 Seal
13 Adapter block
13.1 Screws
17 Turnboard
17.1 Formed seal
17.2 Screws
18 Blank plate
18.1 Screws
19 Air blocker
20 Retaining screw
Fig.9: Attachment according to VDI/VDE3847 onto Type3277 Actuator