Continental Trade Sp. z o. o.


Three-way sight glasses type 590



The ACI three-way flow sight glass Type 590 is based on the solid structure of our proven high-pressure sight glass Type 520. Type 590 has an additional process connection and viewing windows adapted to the operating conditions.

As the 3-way sight glass Type 590 makes use of the solid casing structure of Type 520, it is also possible to fit additional connections / measuring connections with a female thread or ducts for measuring probes if required.

For our casing we only use high-quality stainless steel and steel with pressure container approval according to AD2000. Our sight glasses are available for example in the highly corrosion-resistant 1.4571, especially acid-resistant 1.4539, special alloys such as Hastelloy or duplex steels and many other materials. We can also supply special material according to your specific requirements. Simply make an enquiry.

Type 590 has the same proven borosilicate glass DIN 7080 as our other fittings. Insofar as your process conditions allow, we equip our devices with glass according to DIN 7080 for round sight glass panels made of borosilicate glass with thermal prestressing, but glass panels in special sizes similar to to DIN 7080 for increased pressure, quartz and sapphire glass for very high temperatures, or metal-fused “meta glass” are also part of our product spectrum.

To seal our Type 590 sight glass, we use high-quality flat seals by well-known manufacturers such as Frenzelit novaphit MSTXP with TA air approval, KlingerSIL C4400 with DVGW approval, Garlock Gylon or virginal PTFE for chemically challenging applications, as well as mica compound materials for very high temperatures.

Like our other sight glass types with round viewing windows, Type 590 can be equipped with wipers, lighting or other accessories.

Read on for more detailed technical information and take a look at our animation video or our 3D animation.


Body made of 1.4571, 1.4404 or carbon steel


Three Way Sight Glass

Nominal size:
DN15-100 (Larger sizes available as special design)

Nominal pressure:
PN16, PN40 (higher operating pressures on request)

280 ° C with borosilicate glass to DIN 7080
150 ° C with soda lime glass DIN 8902
up to 500 ° with quartz

Optional execution also in vacuum, available with lighting, with metal fused glasses with wiper or test bores

Optional versions are possible.

Look our animated Video showing the assembly of our three-way flow sight glass type 590.

Download data sheet.

While every attempt has been made to verify the source of the information, no responsibility is accepted for accuracy of data.

Information clause

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Administrator, ie the entity deciding on which personal data will be processed and for what purpose, and in what way, is Continental Trade Sp. z o.o. (hereinafter "Continental Trade" or "We") with its registered office and address in Warsaw at Krasnobrodzka Street 5.

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Continental Trade processes your personal data to enable you to use our services, match the displayed content and ads to your interests, measure quality and effectiveness, improve content and services.

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To whom does Continental Trade share your personal data?

Continental Trade, in principle, does not share your personal data with third parties, except for situations in which Continental Trade has a legal basis, including at the request of authorized entities, or when it is necessary to perform services offered by Continental Trade, e.g. entrepreneurs providing hosting of our services.

How long does Continental Trade store your personal data?

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More information on the protection of your personal data can be found in the Cookie Policy and Security Policy documents published on our website