Technical Data For Natural Gas As Actuator Medium - Siemens SIPART PS2 Operating Instructions Manual

12.7

Technical data for natural gas as actuator medium

Introduction
Note when using an actuator with natural gas that this can escape at the following points:
● At the exhaust air outlet with sound absorber.
● At the enclosure vent.
● At the control air outlet near the pneumatic connections.
Note
Exhaust air outlet with a sound absorber
The positioner is supplied as standard with a sound absorber. To provide an outlet for the
exhaust air, replace the sound absorber by a G¼ pipe coupling.
Enclosure ventilation and control air outlet
Enclosure ventilation and control air outlet cannot be collected and channeled off.
Please refer to the following table for the maximum ventilation values.
Maximum values for escaping natural gas
Ventilation process
Ventilation of the enclosure volume. Purge air
switch is at "IN":
Ventilation via the control air outlet near the pneu‐
matic connections:
Ventilation through the exhaust air outlet with a
sound absorber
Volume
1) Depending on the actuating pressure and volume of the actuator as well as the frequency of control.
The maximum flow rate is 470 Nl/min at a differential pressure of 7 bar.
SIPART PS2 with and without HART
Operating Instructions, 05/2017, A5E00074631-AC
12.7 Technical data for natural gas as actuator medium
Operating
mode
Operation, typi‐
cal
Operation,
max.
Error case,
max.
Operation, typi‐
cal
Operation,
max.
Error case,
max.
Operation,
max.
Error case,
max.
Max. [l]
Technical data
6DR5.1.-.E... 6DR5.2.-.E...
Single-acting Double-acting
[Nl/min] [Nl/min]
0.14 0.14
0.60 0.60
60.0 60.0
1.0 2.0
8.9 9.9
66.2 91.0
358.2 339
1)
1.26 1.23
1),
239