Installation, Commissioning and Maintenance Manual
6
6.0 Operating Limits
Temperature:
-30 to +100°C for standard applications
-20 to +100°C for PED applications
-40 to +160 °C for low temperature
application
-60 to +160°C for ultra-low
temperature application
Design pressure:
up to 12 barg. See RFS doc TR-579,
available upon request
Operating pressure: See RFS doc TR-579,
available upon request
Do not use the equipment outside its operating
limits. Verify operating limits on the nameplate.
Prevent external surface temperature to reach the ignition
point in potentially explosive environments.
The actuator surface temperature is strictly dependent on the
temperature of the process fluid used and by the irradiation’s
conditions. The end-user must check the surface temperature
of the assembly, so that this cannot go over the minimum
gas ignition’s temperature, which classifies the area with the
explosion’s risk.
Dust and debris accumulated on the actuator will slow down
its cooling and contribute to the increase of its external
temperature.
6.1 Allowed Fluid Types
The pneumatic actuator is designed to be operated with
Gas, Instrument air with particles filtering ≤ 40 µm (Class 7
according ISO 8573-1, table 1), pressure dew point ≤ -20°C
(Class 3 according ISO 8573-1, table 2), total concentration of
oil ≤ 5 mg/m3 (Class 4, according ISO 8573-1, table 3); if not
differently specified in specific project documentation.
Do not use the actuator in presence of naked flames.
6.2 Expected Lifetime
Expected Lifetime greater than 25 years, in normal service
conditions and with planned maintenance.
6.3 Tightening Torque Chart
RECOMMENDED TIGHTENING TORQUE
(Class 8.8 bolts)
Bolt Size Nm Ft. Lbs
M6 8.5 6
M8 20 15
M10 40 30
M12 55 40
M14 110 81
M16 220 162
M20 430 317
M22 425 313
M24 585 431
M27 785 579
M30 1250 921
M33 1400 1030
M36 1750 1290
M48 5000 3688
M64 9200 6786
A4US
US
A4
US A4
US
A4
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