Continental Trade Sp. z o. o.


Flow sight glasses type 520A



The ACI high-pressure flow sight glass fittings of Type 520A have a solid casing that is manufactured of various materials, starting with high temperature constructions steel P250GH (1.0460), as well as stainless steels such as 1.4541, 1.4571 or acid-resistant special steels such as 1.4539. According to the pressure level, flanges according to ASME B16.5 are welded on and tested as part of the AD2000 guideline. On request, other materials such as nickel-based alloys like Hastelloy can also be supplied for the greatest wear. The fittings are usually made with two viewing windows, which makes it possible to observe the processes from two sides, as well as an illumination of the process medium.

The standard model has a sight glass manufactured specially for your use, made of thermally hardened borosilicate glass 3.3 or highly temperature-resistant quartz or sapphire glass. The sealing is ensured using flat seals selected especially for your use, according to temperature and chemical load, for example made of graphite (novaphit MST XP) or mica-based seals.

Due to the solid body, our flow sight glass type 520A can be equipped with test connections for measuring instruments or additional process connections (e.g. internal thread) on request.


Watch the animation video further down this page.



1.0460 / 1.4301 / 1.4306 (F304L) / 1.4404 (F316L) / 1.4410 (Super Duplex) / 1.4435 (F316L) / 1.4462 (F 51) / 1.4529 (Alloy 926) / 1.4539 (Alloy 904L) / 1.4541 (F321) / 1.4547 (F44) / 1.4550 (F347) / 1.4571 (316Ti) / 1.4828 / 1.4841 / 1.4876 ( Alloy 800H) / 1.4878 / 1.7335 / 2.4068 (Alloy 201) / 2.4360 (Alloy 400) / 2.4375 (Alloy K500) / 2.4602 (Alloy C-22) / 2.4605 (Alloy 59) / 2.4610 (Alloy C-4) / 2.4816 (Alloy 600) / 2.4819 (Alloy C-276) / 2.4856 (Alloy 625) / 2.4858 (Alloy 825) / 3.7035 (Titan)

With borosilicate glass up to max. 280°C
With quartz glass up to max. 500°C
(Higher temperatures on request)

Nominal width:
1/2" to 8" (The design is made to order. Not every nominal pressure is possible for every size.)

Optional versions are possible.

Straight form
Optionally also available in three-way or four-way form.

Nominal pressure:
Class 300 to Class 1500

The design is order-related

Watch our animation video, here you can see the structure of our flow sight glass type 520A perfectly

Download data sheet.

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

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