Flow sight glass type 550 S-R with indicaton rotor

SHORT DESCRIPTION - FLOW SIGHT GLASS Type 550S-R with Indicaton rotor

The ACI flow sight glass type 550S-R with cast body is a solid flow sight glass with welding ends. It is supplied with a plastic rotor (Tmax.120°C) or PTFE rotor (Tmax. 260°C). The indicator motor helps to visualize the flow in clear or very turbid media.

Type 550S-R is available in various steel and stainless steel cast alloys with pressure equipment approval such as GG-25, GS-C25 or 1.4408. Other alloys such as Alloy C22 are also available on request according to your specifications.

The sealing of the type 550S-R is done with proven flat materials of well-known manufacturers such as KlingerSIL C4400 or Frenzelit novaphit MST. Pure or modified PTFE is also available, as is Garlock Gylon and a wide range of other sealing materials.

For increased operating temperatures or alkaline media, it is possible to provide the sight glass with an additional mica protection layer.

The installation of cleaning devices such as windscreen wipers with PTFE, silicone or NBR wiper blades or spray nozzles is possible at the factory with the Type 550S. Luminaires with halogen or LED light sources, also with ATEX approval, are also available on request.

Contact our competent consulting team to find the perfect solution for your system!

Technical data


Body made of cast steel GS-C 25 (1.0619)
Body made of stainless steel 1.4408


Plastic (max. 120°C)
PTFE (max.260°C)


4.6/5.6 vz or A4-70


Graphite (or as desired)


straight form with welding ends and indicator motor

Nominal size:
see data sheet

Nominal pressure:



With borosilicate glass up to max. 280°C
With soda-lime glass up to max. 150°

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Sight glass type 550-S-R