Bypass level gauge with an observation window RIZUR-NBK-GLASS


Level gauges RIZUR-NBK-GLASS are used for continuous measurement and demonstration of liquid level in reservoirs. 


Intended use and application area

Level gauges RIZUR-NBK-GLASS are used for continuous measurement and demonstration of liquid level in reservoirs.

RIZUR-NBK-GLASS is designed for liquid level control in open and closed reservoirs, including those under pressure. It functions as an indicator of presence/absence of liquid in the controlled volume at a previously set height. Bypass level gauges can be used both in closed installations and in open installations in a wide range of climatic conditions in chemical, petrochemical, medical, food, and other branches of the industry. The operating principle of RIZUR-NBK-GLASS is based on the law of interconnected vessels – the level in the glass tube is the same as the level of the measured liquid in the reservoir. Bypass level gauge with an observation window RIZUR-NBK-GLASS is a simple and reliable solution for liquid level demonstration in both big and small reservoirs.

Standard installation of the bypass level gauge RIZUR-NBK-GLASS is on a side wall of the reservoir. If required, the coupling elements of the bypass level gauge can be located at the top or at one of the sides.

Distinctive features

  • the accuracy of the readings
  • maximum operating temperature up to + 450 °C
  • maximum operating pressure up to 16 МPа
  • different design variants made with different materials, including those for harsh media
  • long service life, simple design, cleanability and easy maintenance
  • optional leakage protection

Bypass level gauges RIZUR-NBK-GLASS are manufactured with valves for automatic leakage protection. Each valve has two steel balls that block the channel automatically to prevent the leakage of the controlled liquid when the pipe is damaged. This protection works when the difference of internal and external pressure is more than 0,3 MPa.

Design variants

Bypass level gauges with an observation window are manufactured in three design variants:

RIZUR-NBK-GLASS-P (reflection)    

RIZUR-NBK-GLASS-S 

RIZUR-NBK-GLASS-K 

RIZUR-NBK-GLASS-P (see-through)

           


rizur-nbk-glass_montage.jpg
RIZUR-GLASS-S RIZUR-GLASS-P RIZUR-GLASS-К

Recommended distance between centers, mm

500, 600, 800, 1000, 1200, 1400 (other, upon an agreement with the manufacturer) 550, 850, 1150, 1450, 1750 (other, upon an agreement with the manufacturer) 300, 500, 800, 1100, 1400, 1700, 2000 (other, upon an agreement with the manufacturer)
Valve material
  • 08Х18Н10 (an analogue of 
  • SS304) 03Х17Н13М2 (an analogue of SS316L)
  • 08Х18Н10 (an analogue of SS304)
  • 03Х17Н13М2 (an analogue of SS316L)

08Х18Н10 (an analogue of SS304)

08Х18Н10 (an analogue of SS304) with PTFE coating 

08Х18Н10Т (an analogue of SS321)

03Х17Н13М2 (an analogue of SS316L)

polypropylene 

other materials - upon an agreement with the manufacturer

Glass type glass glass

single color quartz glass

bi-color quartz glass

Design variant

sight tube

transparent type glass plate2
reflex type glass рlаte3
sight type glass plate4
sight tube
sight tube without blind zone

Maximum process temperature, °С

+200

+450

+450

Process pressure, MPa

1,6 2,5, 4,0, 6,3 - for transparent and reflex types,
0,1, 0,6 - for sight type

*Versions for pressure up to 10 and 16MPa are to be agreed upon with the manufacturer

     2,5

4,0

6,3

10

Process connection

Flange

Thread

Welded

Steam tracer connection

No

Flange

Thread

Welded

Flange

Thread

Welded

Steam tracer pressure, MPa ≤1,0
Air vent/drain

No

Plug

Needle valve

Flange

Ambient temperature,°С

-60...+80


¹ The principle of refraction and reflection of light flux in different media is applied in bi-color quartz glass. Due to the fact that the red part of the light flux spectrum is almost completely refracted and reflected from the surface of the glass in the liquid medium, the part of the level gauge sight tube, where the liquid is present, will be green to the observer. Accordingly, the part of the sight tube without liquid will be red for the observer. This technical solution ensures precise determination of liquid level: liquid medium-green, gas medium-red.
² Transparent type - in the gauge housing the two glasses are located opposite each other (on the front and on the rear walls of the level gauge) in such a way that they are see-through.
³ Reflex type - in the gauge housing one glass is located on the front wall of the level gauge. The rear wall of the gauge is blind.


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