EB 8048-2/-3 EN
27
Mounting and start-up
5.1.2
Version with Type 3379
Actuator
To prevent the actuator stem from rotating, a
locking pin with 3.5 mm diameter is re
-
quired. The locking pin (item no. 1281‑
0066) can be ordered from SAMSON.
1. Undo the screws (34) on the valve
bonnet (20).
2. Lift the valve bonnet (20) together with
the plug (2), plug stem (3), and dia-
phragm (24) off the body (1).
3. Screw the actuator (A) onto the valve
bonnet (20).
4.
"Actuator stem extends" fail-safe ac
-
tion:
guide the locking pin (Ø 3.5 mm)
through the hole located in the bottom
actuator section and the actuator stem.
"Actuator stem retracts" fail-safe action:
apply 6 bar signal pressure to the actua-
tor. Guide the locking pin (Ø 3.5 mm)
through the hole located in the bottom
actuator section and the actuator stem.
Note
x
Table 4:
Dimension x
Version
Valve size
Dimension
x in mm
DN
NPS
Micro-flow
valve
8 to 25
¼ to 1
67.5
Standard
15 to 25
½ to 1
67.5
32 to 65 1¼ to 2½
75
80 and
100
3 and 4
90
Fig. 10:
Dimension x
