• to monitor liquid or gaseous flows
  • 360° all-round view
  • easy mounting between two DIN or ANSI flanges
  • DN 10 up to DN 250
  • low-cost version made of acrylic up to 80 °C
  • borosilcate glass version for aggressive media up to 280 °C
  • quartz glass design for high temperature up to 1100 °C
  • insensitive to dirt build-up
  • max. pressure: up to 232 psi / 16 bar

More informations

Model series DG04 sight glasses are distinguished by their rugged construction and wide range of applications. They feature 30, 50 or 100 mm long transparent cylinders made of acrylic, borosilicate or quartz glass with very high wall thickness. These cylinders are intended to be clamped between two existing flanges. Their dimensions match those of the sealing face on the raised area of the flange. This sizing makes support from a separate metal housing unnecessary.

In addition, this design allows the flow to be viewed and monitored from any direction. The flange screws provide additional protection against mechanical damage.

The sight glass has no dead spaces, so that it can be flushed / cleaned together with the pipeline when changing products.

There are no deposits in the sight glass when the pipeline is drained, because the inner diameter of the sight glass corresponds to the inner diamater of the pipeline. The DG04 are therefore also ideally suited for sterile and antiseptide applications.

Typical applications

The flange bolts also offer additional protection mechanical damage. The borosilicate glass version can be installed in devices used with very caustic / corrosive liquids. They are insensitive to contamination because the inner surface is constantly being rinsed by the flowing liquid.

In particular, the larger nominal sizes are very cost effective splutions since they require the transparent cylinder and no metal housing with flanges.

PDF Information

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Sight Flow Indicators

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