WARNING
Hot vapor
Danger of injury.
You can briefly open the drain valves ⑦ to clean the line. Hot vapor can escape in the process.
● Only open the drain valves ⑦ briefly, and close them again before vapor escapes.
Procedure
① Pressure transmitter ⑦ Drain valves
② Stabilizing valve ⑧ Condensate pots
③,
④
Differential pressure valves ⑨ Differential pressure transducer/Orifice plate
⑤ Differential pressure lines ⑩ Insulation
⑥ Shut-off valves ⑪ 3-way valve manifold
To commission the pressure transmitter for vapor, proceed as follows:
1. Open both the shut-off valves ⑥ at the pressure tapping point.
2. Open the stabilizing valve ②.
3. Wait until the steam in the differential pressure lines ⑤ and in the equalizing vessels ⑧
has condensed.
4. Partially open the differential pressure valve ③ and the vent valve (sealing plug with vent
valve) on the positive side of the pressure transmitter until condensate escapes without
bubbles.
5. Close the vent valve (sealing plug with vent valve).
Commissioning
6.5 Differential pressure and flow rate
SITRANS P320/P420 with 4 to 20 mA/HART
52 Compact Operating Instructions, 09/2018, A5E38874562-AB
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