Flowserve NRG 16-19 - Manual (Page 5)

5
Explanatory Notes
Scope of supply
NRG 16-19
Measuring electrode NRG 6-9
Joint ring D 7 x 2 to DIN 7603 (made from .430), form A, bright annealed
Installation manual
NRG 16-27
Measuring electrode NRG 6-27
Joint ring D 7 x 2 to DIN 7603 (made from .430), form D, bright annealed
Installation manual
NRG 16-28
Measuring electrode NRG 6-28
Joint ring D 24 x 29 to DIN 7603 (made from .430), form A, bright annealed
Installation manual
Description
The measuring electrode fitted in the steam trap or in a separate test chamber monitors the steam trap
for banking-up of condensate and loss of live steam.
The measuring electrodes NRG 6-27, NRG 6-28 feature an additional temperature sensor for
detecting the condensate temperature.
The test station NRA -3 is designed for the connection of up to max. 6 measuring electrodes.
Function
The following electrodes can be used for monitoring steam traps:
n
Measuring electrodes NRG 6-27, NRG 6-28 for detecting loss of live steam (electrode exposed)
and banking-up of condensate (by measuring the temperature of the condensate) or
n
Measuring electrode NRG 6-9 for detecting banking-up of condensate or loss of live steam
(electrode exposed or immerged).
The measuring electrode NRG 6-27, NRG 6-28 works according to the conductivity measurement
principle and signals electrode exposed or immerged. The equipment is also equipped with a tem-
perature sensing element PT 000 for measuring the temperature of the condensate. The measuring
electrode is installed either directly inside the steam trap to be monitored or in the separate test
chamber VKE 6 mounted upstream of the steam trap.
Faulty steam traps cause either banking-up of condensate or loss of live steam. Both conditions will be
detected by the measuring electrode and indicated and evaluated by the test station NRA -3.
The measuring electrode NRG 6-9 works according to the conductivity measurement principle, too.
Depending on the installation the electrode detects either loss of live steam or banking-up of conden-
sate. The readings are then evaluated by the test station NRA -3 or by the level switch NRS -2.