Version With Type 3379 Actuator - Samson EB8048-2 Mounting And Operating Instructions

Fig. 10: Dimension x
5.1.2 Version with Type 3379
Actuator
Refer to Fig. 11
Note
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).
EB 8048-2/-3 EN
Table 4: Dimension x
Valve size
Version
DN
Micro-flow
8 to 25
valve
15 to 25
32 to 65
Standard
80 and
100
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.
Mounting and start-up
Dimension
x in mm
NPS
¼ to 1 67.5
½ to 1 67.5
1¼ to 2½ 75
3 and 4 90
27