Samson foundation 3787, Mounting And Operating Instructions, Page: 17 / 96

insert nuts and secure the pin on the
other side with a hex nut. Observe the
mounting position
A or B explained in
Table 5 and Fig. 4.
4. Place the positioner onto the adapter
housing, making sure the coupling pin
(27) is positioned within the arms of the
bracket (28).
To do so, insert a 2.5 mm Allen key or
a screwdriver from the front into the
bore located below the oblong hole on
the cover plate, and push the positioner
lever into the required position.
5. Screw positioner to the adapter housing.
6. Relieve signal pressure from the actuator.
2.3 Attachment to rotary actuators
The positioner can also be attached to rot-
ary actuators in accordance with VDI/VDE
3845 by using the mounting parts and ac-
cessories listed in Table 6. In this arrange-
ment, the actuator’s rotary motion is con-
verted via the cam disk of the actuator stem
and the feeler roll of the positioner lever
into a linear motion which is required for
the inductive displacement sensor.
Each cam disk has two curves for the
ranges of rotational angle from 0 to 90°
(recommended for all angles of rotation
smaller than 90°) and 0 to 120° (recom-
mended for all angles of rotation larger
than 90°).
Table 6
Rotary actuators (Complete mounting parts, but without cam disks)
SAMSON Type 3278 Actuator Attachmt. acc. to VDI/VDE 3845 Attachment to Masoneilan actuator
Actuator
160 cm
2
Actuator
320 cm2
Camflex I
DN 25 ...100
Camflex I
DN 125...250
Camflex II
Order no.
1400-7103 1400-7104 1400-7105 1400-7118 1400-7119 1400-7120
Piping kit 8 x 1 stainl. steel
G 1400-6670 1400-6672
NPT 1400-6669 1400-6671
Accessories Order no.
Reversing amplifier for double-acting actuators without springs G: 1079-1118 NPT: 1079-1119
Cam disk (0050-0089) with accessories, angle of rotation 0 to 90° and 0 to 120° 1400-6959
Cam disk (0050-0089) specially for VETEC, adjustable per software from 0 to 75° 1400-6960
Cam disk (0050-0090) specially for Camflex, adjustable per software from 0 to 50° 1400-6961
Pressure gauge mounting block G 1/4: 1400-7458; 1/4 NPT: 1400-7459
Pressure gauge set St. steel/Brass:
1400-6957
St. steel/St. steel:
1400-6958
Signal pressure throttles (screw-in type and brass throttle) 1400-6964
Filter check valve, replaces vent plug and increases the degree of
protection to IP 65 (one included with the delivered positioner)
1790-7408
EB 8383-1 EN
17
Attachment to the control valve