Flowserve NRG 16-51 User Manual Page 1

1Installation Instructions 818956-02Level ElectrodesNRG 16-51, NRG 17-51, NRG 19-51GESTRA Steam SystemsNRG 16-51NRG 17-51NRG 19-51ENEnglish

10GESTRA Steam S ystemsGESTRATechnical Data – continued –Dimensions NRG 19-51Fig. 5NRG 19-51b = 70140175≤ 1500Fig. 6NRG 19-51F350140≤ 1500 2841"

11Fig. 10N 8N 10Fig. 7Fig. 8¾", DIN EN ISO 228-1∅ 33Functional Elements12346578NRG 16-51, NRG 17-51, NRG 19-51Fig. 9NRG 16-50NRG 17-50 NRG 19-50

12Fig. 11fecb90adFunctional Elements – continued –NRG 16-51, NRG 17-51, NRG 19-51 with four-pole connector

13Functional Elements – continued –Fig. 13NRG 16-51F, NRG 17-51F, NRG 19-51F with aluminium terminal boxFig. 12ighkj

141 Measuring electrode2 Bore3 Spring4 Electrode tip5 NRG 1...-51: Joint ring 27 x 32, form D, DIN 7603, 1.4301, bright annealed6 Seating surfac

15Important NotesSafety noteDangerWhen loosening the electrode steam or hot water might escape!This presents the risk of severe scalding all over the

16InstallationNRG 16-51, NRG 17-51, NRG 19-51, step 11. Screw electrode tip 4 into measuring electrode 1. Fig. 72. Carefully determine required meas

17Noten For the approval of the boiler standpipe the relevant regulations must be considered.n Refer to pages 18 for typical installation examples.n

184Examples of Installation DN 100∅ 2020≥ DN 2024.5 24.520∅ 20 DN 50 ¾" ¾"¾"≤ 20≤ 3000∅ 20≤ 90°∅ 20 ¾"≤ 90°Centre distance≥ 1

19l Flange PN 40, PN 63, PN 160, DN 50, DIN 2501-1 (for one electrode) Flange PN 40, PN 63, PN 160, DN 100, DIN 2501-1 (for two electrodes)m For

2ContentsUsage for the intended purpose ...

20Connection of level electrodeTo connect the level electrode use screened multi-core control cable with a min. conductor size 0.5 mm2, e.g. LiYCY 4

21Electrical Connection – continued –Wiring diagramFig. 20 Wiring of level electrode with aluminium terminal boxFig. 19 Wiring of level electrode

22Electrical Connection – continued –Keyv Stand-by input 1, 24 V DC, for connecting the logic unit SRLw Level electrode NRG 1...-51, NRG 1...-12 Co

23For your Notes

24818956-02/05-2010cm (808823-02) · GESTRA AG · Bremen · Printed in GermanyAgencies all over the world:www.gestra.deGESTRA AGP. O. Box10 54 60, D-2805

3NRG 16-51, NRG 17-51, NRG 19-51 ...18Key ...

4ApplicationUsage for the intended purposeThe level electrodes NRG 16-51, NRG 17-51 and NRG 19-51 are used in conjunction with level switch NRS 1-51 a

5Directives and StandardsPressure Equipment Directive (PED) 97/23/ECThe level electrode NRG 1...-51 in conjunction with level switch NRS 1-51 is EC ty

6NRG 16-51, NRG 17-51, NRG 19-51Technical DataService pressure NRG 16-51: PN 40, 32 bar at 238 °C NRG 17-51: PN 63, 46 bar at 260 °C NRG 19-51

7Corrosion resistanceIf the equipment is used for the intended purpose, its safety is not impaired by corrosion.SizingThe body is not designed for pul

8Technical Data – continued –Name plate/markingFig. 1Fig. 2Equipment designation Safety noteDisposal noteCE markingPressure rating, thread type, mat

9Technical Data – continued –Dimensions NRG 16-51, NRG 17-51Fig. 3NRG 16-51, NRG 17-51 with four-pole connector≤ 1500 90 272¾", DIN EN ISO 228-1