Please read these operating instructions before unpacking and setting the unit into operation. Follow the instructions precisely as described herein. The instruction manuals on our website www.kobold.com are always for currently manufactured version of our products. Due to technical changes, the instruction manuals available online may not always correspond to the product version you have purchased.
Bypass Level Indicator model: NBK 4. Regulation Use Any use of the Bypass level Indicator, model: NBK, which exceeds the manufacturer’s specification may invalidate its warranty. Therefore, any resulting damage is not the responsibility of the manufacturer. The user assumes all risk for such usage.
The bypass tube is attached at the side of the vessel with a connecting flange or a threaded pipe. The installation position is always vertical. The NBK should only be used for liquids with the medium density specified on the nameplate.
Normally it is sufficient to fix the complete NBK with both process connections. However, should the NBK be subjected to constant shock or strong vibrations it is recommended that the instrument is secured with rubber-damped tube clips.
Check that the density of the liquid is the same as the density given on the nameplate. Check that the float has been correctly installed with the marking "TOP" at the top. Check if dirt deposits in the bypass tube are blocking the float. NBK 01/0322 page 7...
The bypass tube can now be mechanically cleaned. The inspection window for the roller indication is made of high-quality plexiglass (glass for high-temperature display). It should be cleaned with a suitable cleaning agent. The indicator requires no further maintenance. NBK 01/0322 page 8...
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Aluminium, black anodised Carrier frame: Stainless steel 1.4301 Scale: stainless steel 1.4301 Medium temperature: -20...+200 °C Ambient temperature: -20...+200 °C Protection: IP66 * in case of multi-port design, a display length from 32 mm is not readable NBK 01/0322 page 10...
NBK-03/06 (pressure rating as process flange) Drain flange ¾” ASME, stainless steel 1.4571 (316 Ti) NBK-03/06 (pressure rating as process flange) Drain flange 1” ASME, stainless steel 1.4571 (316 Ti) NBK-03/06 (pressure rating as process flange) NBK 01/0322 page 11...
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Option M with connection box at 100 mm distance, max. medium temperature = +300 °C NBK- (Thermal screening option N mandatory with this option) 03/06/07/10/31/32/33 Option and connection box 5000 mm silicone cable, max. medium temperature = +400 °C NBK- (Thermal screening option N mandatory with this option) 03/06/07/10/31/32/33 NBK 01/0322 page 12...
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Not possible with transmitter options H/F Only possible with option T (magnetostrictive sensor) or option M (reed chain with transmitter) Not possible with option T Note: Please pay attention to max. permissible temperature limits of individual components. Sketches of selected options NBK 01/0322 page 13...
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405 Option ST Option TS Option A Model Dimension X NBK-03 NBK-06 NBK-07 NBK-10 Option HL Option HF (centred to dimension L) (centred to dimension L) Options process connection Option F/A Option R/N Option S NBK 01/0322 page 14...
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CF340 Min. density difference Interface float = 150 kg/dm titanium (indicate both densities) *Option N not possible. Not for NBK-10, special float for special medium densities (taring) or reduced length A on request. NBK 01/0322 page 15...
NAMUR, N/C, max. +200 °C (suitable for vessels with strong vibrations) RN200NC ³) Only possible with nominal diameter code 15/20/25/32 (female thread on request) Only possible with NBK-03/06 and nominal size code 15/20/25/32 Only possible with NBK-03 6) Not possible with NBK-10...
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Dimension NBK Model Rated pressure ø x15 … x25 x32 F40 A40 F50 A50 PN 16 NBK-03 Class 150 PN 40 NBK-06 Class 300 60,3 130 PN 63 NBK-07 Class 400 PN 100 NBK-10 Class 600 PN160 NBK-31 Class900 150 245...
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At intermediate temperatures e.g. 120 °C, a linear interpolation is to be carried out between 2 following creep resistance values, e.g. of 100 °C and 150 °C. The pressure/temperature assignment is valid for the following flange models with sizes up to DN 100 used by KOBOLD. Model No. and nomination: 05 Blind flange, 11 Welding neck flange...
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NBK-… with reed chain model W NBK-… with transmitter model M NBK-… with transmitter model T NBK-… with transmitter options H/F (not possible with options VA/VF) NBK 01/0322 page 20...
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NBK-… with thermal NBK-… with heating jacket option LX screen option N NBK 01/0322 page 21...
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NBK-… with transmitter option MU NBK-… with transmitter option MS NBK-… with transmitter option MK NBK-… with transmitter and display option AE/HE or AC/HC NBK 01/0322 page 22...
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Process connection NBK-… with transmitter NBK-… with transmitter option ST model M option ST model H/F option ST NBK-… with transmitter NBK-… with transmitter NBK-… with transmitter options MU and ST options MS and ST options MK and ST NBK 01/0322...
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NBK-… with transmitter Process connection option TT display options AE/HE or AC/HC and option ST NBK-… with transmitter NBK-… with transmitter NBK-… with transmitter model M option TT model H/F option TT optiones MU and TT NBK 01/0322 page 24...
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NBK-… with transmitter NBK-…with transmitter options MU and TT options MS and TT NBK-…with transmitter options MK and TT NBK 01/0322 page 25...
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NBK-…with transmitter display options AE/HE or AC/HC and option TT NBK-…with indicating unit ADI-1, option C NBK 01/0322 page 26...
PED-B-171 NBK-32 PN 250 PED-B-171 NBK-33 PN 320 PED-B-171 The limit contact for bypass level indicators NBK-R, NBK-RT are in conformity with the standards noted below: EN 61010-1:2020 Safety requirements electrical equipment measurement, control and laboratory use - Part 1: General requirements...
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Category III (IV) Diagram 1, vessel, group 1 dangerous fluids Module D, marking CE0575 Notified body: DNV GL Certificate No. PEDD000000R Hofheim, 18 March 2022 H. Volz M. Wenzel General Manager Proxy Holder NBK 01/0322 page 29...
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