Gestra NRG16-36

level electrode NRG 16-36

Data Sheet 810005-06 Issue Date: 09/23
Level Electrode
NRG 16-36
Description The level electrode NRG 16-36 is used in conjunction with level switch NRS 1-50 as water level limiter for steam boilers and (pressurized) hot-water installations and in conjunction with level switches NRS 1-52 / NRS 1-54 or NRS 1-2 /
NRS 1-5 as water level controller.
Water level limiters switch off the heating when the water level falls below the set minimum level (low water).
Function
NRG 16-36
The NRG 16-36 is a combination level electrode consisting of 1 electrode tip for low level alarm (LW) and 3 electrode tips for
water level control with high level alarm (MAX).
The electrode operation is based on the conductive measuring principle using the electrical conductivity of the water for
signalling water level. The high integrity self-monitoring function in the level limiter ensures that an alarm will also be triggered
if the electrode insulation is contaminated or has developed a leak and/or if there is a malfunction in the electrical connection.
The length of the individual electrode rods determines the switchpoints for the respective water levels.
The level electrode is installed inside steam boilers, vessels or in an external level pot. If the electrode is installed inside the
boiler or vessel, a protection tube provided on side ensures correct functioning.
If the level electrode is installed in an isolatable level pot outside the boiler, make sure that the connecting lines are rinsed
regularly. In addition, the logic unit SRL is required to monitor the purging times and the purging sequence.
If the connecting lines for steam ≥ 40 mm and water ≥ 100 mm, the installation is considered to be internal. In this case the
rinsing processes do not have to be monitored.
Technical Data
Application in potentially explosive areas
Operating pressure
PN 40, 32 bar at 238 °C
This device must not be used in potentially explosive areas.
Mechanical connection Screwed BSP 1 ½ A, ISO 228-1 Materials Screw-in body 1.4571, X6CrNiMoTi17-12-2
Electrode tips 1.4571, X6CrNiMoTi17-12-2 Electrode insulation Gylon®, PTFE
Spacer disks PTFE Terminal box 3.2161 G AlSi8Cu3 Lengths available 500 mm, 1000 mm, 1500 mm
Electrical connection Terminal box made from aluminium, with 2 four pole
­connector with screw terminals, 2 cable glands Pg 11 Protection
IP 65 to EN 60529 Ambient temperature Max. 70 °C Weight Approx. 4.5 kg (L=1000 mm)
Gylon® is a registered trademark of Garlock Sealing Technologies, Palmyra NY, USA