00809-0100-4835 Rev BD
2-4
Process Connections and
Interfaces
Mount the process flanges with sufficient clearance for process
connections. For safety reasons, place the drain/vent valves so the
process fluid is directed away from possible human contact when the
vents are used. Also consider that access to the vent/drain valve(s)
and process connection(s) may be required for plant specific
operations (i.e. calibration, draining, etc.)
Process tubing must be installed to prevent any added mechanical
stress on the transmitter under seismic conditions. Use stress-relief
loops in the process tubing or separately support the process tubing
close to the transmitter.
Typical connections on the transmitter flanges are ¼ - 18 NPT or 3/8
inch Swagelok ™. Use your plant-approved, qualified thread sealant
when making threaded connections. The end-user is responsible for
the qualification of the threaded seal interface on all ¼ - 18 NPT
interfaces.
Transmitters with options including 3/8 inch Swagelok™ are shipped
with front ferrule, rear ferrule and nut. Place these fittings on the
tubing with the orientation and relative position shown in Figure 2-1.
Use process tubing with 3/8 inch outside diameter and of suitable
thickness for the pressure involved.
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