rotork FAIRCHILD PAX1, User Manual

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PAX1 Motor Set Pressure Regulator User Manual
Hazardous Area (Classified) Conditions of use
• Under certain extreme circumstances, the non-metallic
parts incorporated in the enclosure of this equipment
may generate an ignition-capable level of electrostatic
charge. Therefore the equipment shall not be installed in
a location where the external conditions are conducive
to the build-up of electrostatic charge on such surfaces.
In addition, the equipment shall only be cleaned with a
damp cloth.
• Contact the manufacturer if information of flameproof
joints is needed.
3. Installation
The PAX1 can be mounted in any position without affecting
its operation. It can be mounted to a flat surface using the
mounting holes on the actuator. An optional mounting
bracket is also available. For details, see “PAX1 Exterior
Dimensions”.
Pressure Regulator Piping
Clean all pipelines to remove dirt and scale before installation.
Apply a minimum amount of pipe compound to the male
threads of the fitting only. Do not use Teflon tape as a
sealant. Start with the third thread back and work away from
the end of the fitting to avoid the possibility of contaminating
the regulator. Install the regulator in the air line. The inlet and
outlet connections are labeled on the regulator body under
the ports. Tighten connections securely.
NOTES:
Oil free air must be applied to the regulator. Use a
filter to remove dirt and entrained liquid in the air line ahead
of the pressure regulator. If an airline lubricator is used, it
MUST be located downstream of the pressure regulator or
performance will be affected.
Installation below ground level
Pressure Regulator Vent: For units that are installed below
ground and in areas where the unit may be under water due
to flooding, the pressure regulator vent should be piped to
an area where the outlet of the vent pipe is located at an
elevation above any possible flooding. Water entering the
bonnet vent will cause an increase in the outlet pressure in
direct relation to the depth of the water above the vent. This
can cause a significant increase in outlet pressure especially
in low pressure systems and may cause dangerous system
overpressure conditions.
Conduit Seal: The PAX1 is rated for limited submerged
operation but the user is responsible for ensuring water
cannot enter the PAX1 enclosure through the conduit
connection and conduit port. Ensure the conduit installation
is water tight at elevations that may be submerged
below water. Where conduit is prone to collect internal
condensation, appropriate conduit traps, drains and seals
must be employed to prevent condensation from collecting
inside the PAX1 enclosure.
2. General Information
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