Installation Recommandations - ABB 266 HART Operating Instruction

266 Models - HART
Installation recommendations
Impulse piping configuration depends on the specific measurement application.
Steam (condensable vapor) or clean liquids flow
measurement
– Place taps to the side of the line.
– Mount beside or below the taps.
– Mount the drain/vent valve upward.
– In case of steam application fill the vertical section of the
connecting lines with a compatible fluid through the
dedicated filling tees.
The process fluid must enter the transmitter primary:
– Open equalizing valve (C)
– Close low pressure (B) and high pressure (A) valves .
– Open gate valves
– Slowly open high pressure (A) valve to admit process fluid to
both sides of primary.
– Vent or drain the primary unit and then close the valves.
– Open the (B) valve and close the equalizing valve.
Figure 26: Steam or clean liquid flow measurement (transmitter and manifold)
Gas or liquid (with solids in suspension) Flow
Measurement
– Place the taps to the top or side of the line.
– Mount the transmitter above the taps.
The process fluid must enter the transmitter primary:
– Open equalizing valve (C)
– Close low pressure (B) and high pressure (A) valves .
– Open gate valves
– Slowly open high pressure (A) valve to admit process fluid to
both sides of primary.
– Vent or drain the primary unit and then close the valves.
– Open the (B) valve and close the equalizing valve.
Figure 27: Gas or liquid flow measurement (transmitter and manifold)
24 OI/266/HART-EN Rev. D | 2600T Series Pressure transmitters