Flowserve NRGS 11-1 - Manual (Page 8)

8
Explanatory Notes
Scope of Supply
Function
Designs
NRGS 11-1
1 Compact system type NRGS 11-1, PN 6
1 Joint ring (of stainless steel 1.4301) D 33 x 39 to DIN 7603
1 Installation manual
NRGS 16 -1
1 Compact system type NRGS 16-1, PN 40
1 Joint ring (of stainless steel 1.4301) D 33 x 39 to DIN 7603
1 Installation manual
NRGS 16 -1 S
1 Compact system type NRGS 16-1 S (flanged design for marine application)
1 Flange DN 50, PN 40, DIN 2635
1 Installation manual
System Description
The compact system NRGS 11-1, NRGS 16-1, NRGS 16-1 S works according to
the conductivity measurement principle.
With the NRGS 11-1, NRGS 16-1, NRGS 16-1 S a maximum of 4 levels can be
signalled in conductive liquids:
■ 4 levels with one switchpoint each
■ High-level alarm, low-level alarm, pump ON, pump OFF with one
switchpoint each
The NRGS 1...-1(S) has a switching controller integrated in the electrode case for
the control of all functions. External switchgear is therefore not required.
The conductivity of the liquid is used to signal the liquid level. Some liquids are
conductive, which means that they allow an electric current to flow through
them. For the safe functioning of this device a minimum conductivity of the liquid
to be measured is required.
The conductivity measurement method can detect two conditions: electrode tip
submerged or exposed, meaning switchpoint reached or not reached. Before
installation, the length of the electrode tip must be cut to the required switching
levels, e. g. for high-level/low-level alarm, controlling of a valve or pump.
NRGS 11-1, NRGS 16 -1:
Screwed design 1" BSP, DIN ISO 228. Fig. 1
NRGS 16 -1 S:
Flanged design for marine applications DN 50, PN 40, DIN 2635. Fig. 2