Gestra Level Electrodes NRG

The level electrodes NRG 1...-50 are used in conjunction with level switch NRS 1-50 as water level limiters for steam boilers and (pressurised) hot water installations. Water level limiters switch off the heating when the water level falls below the set minimum level (low water).

Service pressure

• NRG 16-50: PN 40, 32 bar at 238 °C
• NRG 17-50: PN 63, 60 bar at 275 °C
• NRG 19-50: PN 160, 100 bar at 311 °C
• NRG 111-50: PN 320, 183 bar at 357 °C 

Mechanical connection

• Screwed G ¾ A to ISO 228-1 (NRG 16-50, NRG 17-50, NRG 19-50)
• Screwed G 1 A to ISO 228-1 (NRG 111-50)

Materials

• Screw-in body: 1.4571, X6CrNiMoTi17-12-2 (NRG 16-50, NRG 17-50, NRG 19-50)
• Screw-in body: 1.4529, X1NiCrMoCuN25-20-7 (NRG 111-50)
• Measuring electrode: 1.4571, X6CrNiMoTi17-12-2 (NRG 16-50, NRG 17-50, NRG 19-50)
• Measuring electrode: 1.4122, X39CrMo17-1 (NRG 111-50)
• Electrode tip: 1.4401, X5CrNiMo17-12-2
• Electrode insulation: Gylon® (NRG 16-50, NRG 17-50, NRG 19-50)
• Electrode insulation: special ceramic (NRG 111-50)
• NRG 1...-50: Four-pole connector: polyamide (PA)
• NRG 1...-50F: Terminal box 3.2161 G AlSi8Cu3

Lengths supplied

500 mm, 1000 mm, 1500 mm, 2000 mm, 2500 mm, 3000 mm

ph value

Max. admissible: 10 (NRG 111-50)

Electrical connection

• NRG 1...-50: Four-pole connector, cable glands M 16
• NRG 1...-50F: Terminal box made from aluminium, cable gland M 2

ph value

Max. admissible: 10 (NRG 111-50)

Electrical connection

• NRG 1...-50: Four-pole connector, cable glands M 16
• NRG 1...-50F: Terminal box made from aluminium, cable gland M 2

Weight

• Approx. 1.2 kg (without extension) (NRG 16-50, NRG 17-50, NRG 19-50)
• Approx. 2.1 kg (without extension) (NRG 16-50F, NRG 17-50F, NRG 19-50F)
• Approx. 1.8 kg (without extension) (NRG 111-50)
• Approx. 2.7 kg (without extension) (NRG 111-50F)

Datasheet : Gestra NRG

NRG 16-50
NRG 17-50
NRG 19-50
NRG 111-50

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