Azbil AVP200, Руководство пользователя

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2-8
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Supply air
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The supply air must be clean, dry air without moisture, oil, contaminants, or for-
eign matter such as dust. In the air supply system, an aftercooler, air drier, filter,
and the like should be installed after the compressor. Exercise caution with regard
to, for example, the supply piping structure.
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Dry air refers to air which, at atmospheric pressure, has a dew point that is at least
10 °C lower than the lowest temperature in the environment in which the device is
actually used. (For example, if the lowest temperature where the device is used is
0 °C, use air with a dew point of −10 °C or less as supply air.)
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Pressure regulator with filter
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The regulator is used to adjust the supply air pressure to the positioner.
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Install the regulator as close as possible to the body of the positioner.
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The control valve can be operated manually by using this regulator in conjunction
with the A/M switching function. (Not possible when a double-acting actuator is
used.)
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Use a filter that is 3 µm or finer.
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Solid particles in the supply air can be removed by this filter.
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If the regulator is not equipped with a filter, insert a separate filter (3 µm or finer)
immediately before the regulator.
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Shutoff valve
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This valve is used to temporarily shut off the supply of air to the device.
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With this valve, this device or the control valve can be removed for maintenance
without stopping the air supply system as a whole.
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Piping
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Use pipes with an inside diameter of 6 mm.
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Pipes should be selected to fit the installation environment; for example, in a cor-
rosive environment, use vinyl-covered copper pipes.
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Use joints that fit the pipes being used.