Technical Data - Samson 3731-3 Mounting And Operating Instructions

Design and principle of operation
Type 3731-3 Ex d Positioner (technical data in test certificates additionally apply for explosion-protected devices)
to fill actuator
Air
with air
output
to vent
capacity
actuator
Permissible ambient
temperature
Influences
EMC
Electrical connections
Explosion protection
Degree of protection
Use in safety-
instrumented systems (SIL)
Compliance
Materials Housing
External parts Stainless steel 1.4301/1.4305/1.4310
Weight
12
EB 8387-3 EN
At ∆p = 6 bar: 8.5 m ³/h · At ∆p = 1.4 bar: 3.0 m
n
At ∆p = 6 bar: 14.0 m ³/h · At ∆p = 1.4 bar: 4.5 m
n
–40 to 80 °C
The limits in the test certificate additionally apply.
Temperature: ≤ 0.2/10 K · Supply air: None
Vibration: ≤ 0.25 % up to 2000 Hz and 4 g acc. to IEC 770
Complying with the requirements of EN 61000-6-2, EN 61000-6-3, EN 61326-1 and
NAMUR Recommendation NE 21
Two threaded connections with ½ NPT thread, optionally with M20 x 1.5
Screw terminals for 2.5 mm² wire cross-section
See "Summary of explosion-protection certificates"
IP 66/NEMA 4 X
Observing the requirements of IEC 61508, the systematic capability of the control valve
for emergency venting as a component in safety-instrumented systems is given.
Use is possible on observing the requirements of IEC 61511 and the required hardware
fault tolerance in safety-instrumented systems up to SIL 2 (single device/HFT = 0) and SIL
3 (redundant configuration/HFT = 1).
·
Die-cast aluminum EN AC-AlSi10Mg(Fe) (EN AC-44300) acc. to DIN EN 1706
chromated and powder paint coating
Approx. 2.5 kg
³/h · K = 0.09
n Vmax(20 °C)
³/h · K = 0.15
n Vmax(20 °C)