Siemens SITRANS P - Page 53

Procedure
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① Pressure transmitter ⑦ Drain valves
② Stabilizing valve ⑧ Condensate pots
③,
④
Di󹪜erential pressure valves ⑨ Di󹪜erential pressure transducer
⑤ Di󹪜erential pressure lines ⑩ Insulation
⑥ Shut-o󹪜 valves ⑪ 3-way valve manifold
1. Open both the shut-o󹪜 valves ⑥ at the pressure tapping point.
2. Open the stabilizing valve ②.
3. Wait until the steam in the di󹪜erential pressure lines ⑤ and in the equalizing vessels ⑧ has
condensed.
4. Partially open the di󹪜erential 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 di󹪜erential pressure valve ③.
8. Partially open the di󹪜erential pressure valve ④ until condensate escapes without bubbles.
9. Close the vent valve with blanking plug on the negative side ①.
10.Close the di󹪜erential pressure valve.
11.Open the di󹪜erential pressure valve ③ by half a revolution.
Commissioning
6.3 Application examples
SITRANS P320/P420
Compact Operating Instructions, 01/2021, A5E38874562-AC 53