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).
6. Partially open the vent valve (sealing plug with vent valve) on the negative side of the
pressure transmitter until condensate escapes without bubbles.
7. Close the differential pressure valve ③.
8. Partially open the differential pressure valve ④ until condensate escapes without bubbles.
9. Close the vent valve with blanking plug on the negative side ①.
10.Close the differential pressure valve.
11.Open the differential pressure valve ③ by half a revolution.
Commissioning
8.5 Application examples
SITRANS P320/P420 (mA/HART)
Operating Instructions, 06/2018, A5E44852162-AA 95
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