Mounting Sequence; Initial Adjustment Of Travel - Samson 3767 Mounting And Operating Instructions

Mounting on control valves
3.2.1 Mounting sequence
Î Mounting parts and range spring: see
Table 4/Table 5. Installation in Fig. 7.
Valve with cast yoke
1. Screw the plate (20) to the stem connec-
tor of the actuator and plug stems using
the countersunk screws.
Use the additional bracket (32) for 2100
and 2800 cm² actuators with 120 mm
travel.
2. Remove the rubber stopper from the
adapter housing and fasten the adapter
housing either on the left or right of the
NAMUR rib using the hexagon head
screw as shown in Fig. 6.
Valve with rod-type yoke
1. Screw the plate (20) to the follower
clamp of the plug stem.
2. Screw the studs (29) into the adapter
housing.
3. Place the adapter housing with the plate
(30) onto either the left or right valve rod
and screw tight using the nut (31). Make
sure that the adapter housing is at the
correct height to mount the lever (18) so
that it is in a horizontal position when
the valve is at mid-travel.
4. Screw the pin (19) into the middle row of
holes on the plate (20) and lock it into
position over the correct lever marking (1
or 2) as indicated in Table 6.
5. Clamp the clip (21) onto the lever (18).
The clip must be clamped onto the lever
(18) with the open side facing down-
22
ward when the positioner is attached
with the air connection at the front.
6. Attach the lever (18) including clamping
plate (22) to the shaft (25), making sure
that the clip clasps the pin (19).
3.2.2 Initial adjustment of
travel
1. Move the valve to 50 % travel.
2. Move the shaft (25) in the adapter hous-
ing so that the black pointer (24) match-
es the cast marking on the adapter hous-
ing.
3. Fasten the clamping plate (22) in this po-
sition using the screw (23).
4. Screw the pin (27a) into the positioner
lever on the side where the press nut is
located. Lock it in position with the hex
nut on the other side, observing the
mounting position A or B according to
Table 6 and Fig. 7.
5. Place the positioner on the adapter hous-
ing, taking into account the mounting di-
rection. Fasten it, making sure that the
pin (27a) rests against the bracket (28).
The pin must not slip out of the bracket
once installed.
6. Check whether the correct range spring
has been installed as listed in Table 6.
Range spring 1 is installed as standard.
If necessary, replace it with range spring
2 included in the accessories and fix it at
the outer hook-in holes.
7. Perform positioner setting as described in
section 5.1.
EB 8355-2 EN