Samson Series 3730 User Manual

5-2 EB 8384-3 EN
Installation
5.2 Preparation for installation
Before mounting, make sure the following
conditions are met:
− The positioner is not damaged.
− The air supply is not yet connected to the
positioner.
− The current is not yet connected to the
positioner.
Proceed as follows:
Î Lay out the necessary material and tools
to have them ready during mounting.
Î Adjust correct lever and pin position (see
section5.3).
Î Seal the signal pressure output at the
back of the positioner with the screw
plug(4,orderno.0180-1436)andthe
associated O-ring (order no. 0520-
0412) if the screw plug is not yet in
place.
Î Remove the protective caps from the
pneumatic connections.
5.3 Adjusting the lever and pin
position
The M lever is included in the scope of deliv-
ery.
S, L and XL levers are available as accesso-
ries (see section5.13).
The XXL lever is available on request.
The positioner is adapted to the actuator and
to the rated travel by the lever on the back of
the positioner and the pin inserted into the
lever.
The travel tables on page 5-5 show the
maximum adjustment range at the position-
er. The travel that can be implemented at the
valve is additionally restricted by the selected
fail-safe position and the required compres-
sion of the actuator springs.
The positioner is equipped with the M lever
(pin position 35) as standard (see Fig.5-3).
If a pin position other than position 35 with
the standard M lever is required or an L or
XL lever size is required, proceed as follows
(see Fig.5-4):
1. Unthread the nut (1.1) to unfasten the
mounted lever.
Î Make sure that the lever does not rest
on the end stops.
2. Fasten the follower pin (2) in the as-
signed lever hole (pin position as speci-
edinthetraveltablesonpage5-5).
Only use the longer follower pin includ-
ed in the mounting kit.
3. 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).
Î Make sure that the lever does not rest
on the end stops.
5.4 Exchanging the lever
The procedure to exchange the lever de-
pends on whether the standard version of
the positioner has been ordered with a slid-
ing clutch or the special version without a
sliding clutch.
Note

Samson Series 3730 Specifications

General

Supply Pressure	1.4 to 7 bar (20 to 100 psi)
Ambient Temperature	-40 to +80 °C (-40 to +176 °F)
Enclosure Rating	NEMA 4X / IP66
Output Pressure	Up to supply pressure
Mounting	Direct mounting on linear and rotary actuators