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sight-glass-fitting as rectangular or circular container sight glass

A sight-glass-fitting can be used to observe and check tanks like silos, storage tanks or pressure vessels. The exceptionally pressure and temperature resistant glasses allow you to see the inside of the tank for visual inspection. The container sight glasses from NieRuf come in two models: as rectangular or circular sight glasses. The rectangular sight-glass has one long side and two shorter ones. Thus it is often welded onto the tank in a vertical way, which allows you to keep an eye on the filling level. The circular sight-glass is used in silos or boilers. The round glass allows for a larger field of view. After welding the mounting flange, you should check whether the sealing area has moved. In this case, reworking might be required. The operating pressure is valid not only for the base frame and needs to be checked with the pressure device according to technical bulletin AD B9. Please contact us if you need further information.

sight-glass-fitting as rectangular or circular container sight glass

A sight-glass-fitting can be used to observe and check tanks like silos, storage tanks or pressure vessels. The exceptionally pressure and temperature resistant glasses allow you to see the inside of the tank for visual inspection. The container sight glasses from NieRuf come in two models: as rectangular or circular sight glasses. The rectangular sight-glass has one long side and two shorter ones. Thus it is often welded onto the tank in a vertical way, which allows you to keep an eye on the filling level. The circular sight-glass is used in silos or boilers. The round glass allows for a larger field of view. After welding the mounting flange, you should check whether the sealing area has moved. In this case, reworking might be required. The operating pressure is valid not only for the base frame and needs to be checked with the pressure device according to technical bulletin AD B9. Please contact us if you need further information.

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Sight glass fitting DN200 - 8" Inch BS01 stainless steel 1.4571 borosilicate glass 2,5bar

BS01000014

Sight glass fitting DN200 - 8" Inch aus stainless steel 1.4571 to be welded directly to tank Glas borosilicate glass 2,5bar

Technical features

  • diameter DN200 - 8" Inch
  • connection to be welded directly to tank
  • seal C4400
  • design to be welded directly to tank
  • max. working pressure 2,5bar
  • NieRuf-Exchange

€900.00*

€1,071.00 VAT included.

Delivery time
in stock
Express delivery*

Sight glass fitting DN80 - 3" Inch BS04 stainless steel 1.4571 borosilicate glass 0,0 bar

BS04000010

Sight glass fitting DN80 - 3" Inch aus stainless steel 1.4571 to be welded directly to tank Glas borosilicate glass 0,0 bar pressureless

Technical features

  • diameter DN80 - 3" Inch
  • connection to be welded directly to tank
  • seal C4400
  • design to be welded directly to tank
  • max. working pressure 0,0 bar
  • NieRuf-Exchange

€310.00*

€368.90 VAT included.

Delivery time
in stock
Express delivery*

sight flow indicator DN40 - 1 1/2" Inch DIN 11851 stainless steel 1.4404 / AISI 316L

GS04020007

sight flow indicator DN40 - 1 1/2" Inch aus stainless steel 1.4404 / AISI 316L to be welded directly to tank acc. DIN 11851 Glas borosilicate glass 10,0 bar

Technical features

  • diameter DN40 - 1 1/2" Inch
  • connection to be welded directly to tank acc. DIN 11851
  • seal NBR
  • design for welding
  • max. working pressure 10,0 bar
  • NieRuf-Exchange

€87.20*

€103.77 VAT included.

Delivery time
in stock
Express delivery*

Sight glass fitting DN150 - 6" Inch BS01 stainless steel 1.4571 borosilicate glass 2,5bar

BS01000013

Sight glass fitting DN150 - 6" Inch aus stainless steel 1.4571 to be welded directly to tank Glas borosilicate glass 2,5bar

Technical features

  • diameter DN150 - 6" Inch
  • connection to be welded directly to tank
  • seal C4400
  • design to be welded directly to tank
  • max. working pressure 2,5bar
  • NieRuf-Exchange

€626.00*

€744.94 VAT included.

Delivery time
in stock
Express delivery*

sight flow indicator DN65 - 2 1/2" Inch DIN 11851 stainless steel 1.4404 / AISI 316L

GS04020009

sight flow indicator DN65 - 2 1/2" Inch aus stainless steel 1.4404 / AISI 316L to be welded directly to tank acc. DIN 11851 Glas borosilicate glass 10,0 bar

Technical features

  • diameter DN65 - 2 1/2" Inch
  • connection to be welded directly to tank acc. DIN 11851
  • seal NBR
  • design for welding
  • max. working pressure 10,0 bar
  • NieRuf-Exchange

€107.60*

€128.04 VAT included.

Delivery time
in stock
Express delivery*

Sight glass fitting DN100 - 4" Inch BS04 stainless steel 1.4571 borosilicate glass 0,0 bar

BS04000011

Sight glass fitting DN100 - 4" Inch aus stainless steel 1.4571 to be welded directly to tank Glas borosilicate glass 0,0 bar pressureless

Technical features

  • diameter DN100 - 4" Inch
  • connection to be welded directly to tank
  • seal C4400
  • design to be welded directly to tank
  • max. working pressure 0,0 bar
  • NieRuf-Exchange

€328.00*

€390.32 VAT included.

Delivery time
in stock
Express delivery*

Sight glass fitting DN80 - 3" Inch BS02 stainless steel 1.4571 borosilicate glass 16bar

BS02000010

Sight glass fitting DN80 - 3" Inch aus stainless steel 1.4571 to be welded directly to tank Glas borosilicate glass

Technical features

  • diameter DN80 - 3" Inch
  • connection to be welded directly to tank
  • seal C4400
  • design to be welded directly to tank
  • max. working pressure 16bar
  • NieRuf-Exchange

€530.00*

€630.70 VAT included.

Delivery time
in stock
Express delivery*

sight flow indicator DN125 - 5" Inch DIN 11851 stainless steel 1.4404 / AISI 316L

GS04020012

sight flow indicator DN125 - 5" Inch aus stainless steel 1.4404 / AISI 316L to be welded directly to tank acc. DIN 11851 Glas borosilicate glass 10,0 bar

Technical features

  • diameter DN125 - 5" Inch
  • connection to be welded directly to tank acc. DIN 11851
  • seal NBR
  • design for welding
  • max. working pressure 10,0 bar
  • NieRuf-Exchange

€316.30*

€376.40 VAT included.

Delivery time
in stock
Express delivery*

Container sight-glass in different models: resistant due to high quality materials

The container sight-glass fitting comes with a high quality borosilicate glass DIN7081. This glass, including a C4400-Klingersil-seal, is flanged between mounting and cover flange using screws and nuts. Mounting and cover flange are made of high quality V4A stainless steel 1.4571 and 1.4541. The flange of circular sight-glasses can be made in nominal sizes DN25 to DN200. The rectangular sight-glasses-fitting can range from a length of 170mm to 930mm. Our container sight glasses can be used with liquid and gaseous media, feel free to contact us if you have questions about additional compatibility. With aggressive media and steam, mica disks should be used to protect the glass. The container sight glass valves can be used in temperatures from 0° to 280°C. Depending on the model, they can be used in pressure vessels and pipelines with a maximum pressure of up to 16 bar (please check technical bulletin AD B9).


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You can reach us from Monday to Friday at +497143 9666900 and any time at sales@nieruf.com

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Our certified quality management according to DIN EN ISO 9001: 2015 is part of our DNA. With our test stands we can carry out pressure tests with up to 350 bar with air and water as well as leak tests according to DIN EN 122661.

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If you have any questions, we are available by phone from Monday to Friday from 8:30 a.m. to 5:00 p.m.

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07143 / 96669 - 00