Samson 3374 Mounting And Operating Instructions page 10

Design and principle of operation
Table 2: Version with fail-safe action
Actuator Type 3374
Type of connection
Fail-safe action
Travel
Travel limit
Electrical connection
Power supply
Power consumption
24 V
85 to 264 V
Possible fuse protection
Transit time in s · Stroking speed in mm/s
Normal
3)
Fast
4)
Upon fail-safe action
Forces in kN
Thrust (stem extends)
Thrust (stem retracts)
Nominal thrust of safety
spring
Manual override
Weight
kg (approx.)
For attachment to SAMSON Series V2001 Valves (DN 15 to 80) and to SAMSON Type 3260
1)
(DN 65 to 150) and Type 3214 Valves (DN 65 to 100)
For attachment to SAMSON Series 240 Valves and to SAMSON Type 3214 Valve (DN 125 to 250)
2)
Normal speed level (Code c64 = NORM)
3)
Fast speed level (Code c64 = FAST)
4)
10
-21
With yoke
1)
Stem extends
mm
AC
DC
AC
Melting integral of upstream fuse: I²t
60 · 0.25
30 · 0.5
12 · 1.25
2
0.5
2
4.2
-26
With ring nut
2)
15
Between 10 and 100 % of the rated travel
24 V AC ±15 %, 47 to 63 Hz
24 V DC ±15 %
85 to 264 V AC, 47 to 63 Hz
Speed level: Normal · Fast
13.5 VA · 22 VA
10 W · 15 W
18.5 VA · 27 VA
60 · 0.25
30 · 0.5
12 · 1.25
2
0.5
2
–
4.3
-31
With yoke With ring nut
1)
Stem retracts
15
≥ 12 A²s
s
60 · 0.25 60 · 0.25
30 · 0.5 30 · 0.5
12 · 1.25 12 · 1.25
2
0.5
0.5
3.8
EB 8331-4 EN
-36
2)
2
0.5
0.5
3.9