GE FVP110, Руководство по обслуживанию

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FVP 110 Fieldbus Valve Positioner Manual
52
GE Energy
Piping
Air Supply
For stable operation of the FVP110 over a long term, a clean and dry supply of air needs
to be maintained. Be careful about the following:
❑
To prevent moisture, oil, and dust from being led into the FVP110 through pipes,
give careful consideration to the choice of the air supply system and supply air
suction point as well as installation of the air supply header and air supply piping.
❑
The desired supply air must:
❑ Be dry air whose dew point is at least 10 °C lower than that of the ambient
temperature.
❑ Be free from solid particles as a result of being passed through a 5-µm or finer
filter.
❑ Not contain oil at a concentration higher than 1 ppm in weight or volume.
❑ Not be contaminated by a corrosive, explosive, flammable, or toxic gas.
❑ Comply with ANSI/ISA-57.3 1975 (R1981) or ISA-S7.3-1975 (R1981).
❑
The FVP110 requires an air supply of 140 to 400 kPa. Within this range, regulate
the air supply pressure at a level within ±10% of the air supply pressure specified
for the actuator, and at 10% of the actuator’s spring range or higher.
WARNING
Do not supply air at a pressure exceeding the maximum rated
air supply pressure of the actuator or the FVP110 (400 kPa).
Doing so can result in a high risk of damage to the equipment
or lead to an accident.
Pneumatic Piping
To obtain the maximum air processing flow rate of the FVP110, the inner diameter of the
piping tube must be at least 6 mm. When the FVP110 is combined with a high-capacity
actuator and a minimum response speed is required, use a tube whose inner diameter is
6 mm or larger. A power failure results in the fail-safe action; OUT1=0% and
OUT2=100%.
CAUTION
Do not use an unnecessarily long tube or piping as it
decreases the air flow rate, leading to a decrease in response
speed.