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High-pressure sight glass type 522 PN 63/400
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A cylindrical metal component with six hexagonal sockets on one end and a small threaded opening on the side, designed for mechanical applications.
A circular metallic disk featuring six hexagonal recesses for bolts, with a central hole.
A metallic cylindrical connector with threaded ends and a central hole, designed for piping or plumbing applications.
Video | Flow sight glass type 522 – ACI industrial valves GmbH

High-pressure sight glass type 522 PN 63/400

Flow sight glass with female thread

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Delivery time on request

High-pressure flow sight glass PN 63 | PN 100 | PN 160 | PN 250 | PN 320 | PN 400

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Certified quality
Technical data
  • Double glazing
Datasheet

Flow sight glass type 522 – ACI industrial valves GmbH

Video | Flow sight glass type 522 – ACI industrial valves GmbH

Product information

The high-pressure flow sight glass type 522 was specially developed for industrial high-pressure applications and stands for maximum operating safety and durability even under extreme conditions. Its particularly robust body, made of corrosion-resistant stainless steel alloys such as 1.4571, guarantees reliable function even under permanently high pressure and temperature loads. On request, versions with particularly resistant materials such as nickel-based alloys or Hastelloy® are also available, allowing the sight glass to be reliably used even in highly aggressive or thermally highly stressed process environments.

Type 522 is characterized by two oppositely arranged sight plates, made of high-quality, thermally tempered borosilicate glass. These glasses are oriented to the requirements of DIN 7080 and allow clear, safe process observation from both sides or targeted illumination of the medium. The bilateral view enables real-time visual monitoring of the process – a significant safety and efficiency advantage in modern process engineering.

The internal threaded connections comply with DIN EN ISO 228-1 (BSP thread) or ANSI B 1.20.1 (NPT thread) and ensure a standardized, secure integration into existing pipeline systems. Depending on the requirements, the flow sight glass can be manufactured for pressure levels up to PN 400, making it ideal for high-pressure processes in the chemical, pharmaceutical, food, or energy industries.

Thanks to its thoughtful design, high-quality material selection, and flexible execution options, the high-pressure sight glass type 522 provides a durable, safe, and individually customizable solution for the most demanding industrial applications.

  1. Screws
  2. Cover flange
  3. Glass cushion
  4. Sight glass
  5. Gasket
  6. Body
An exploded view of a mechanical assembly showing various components, including bolts, a flange, seals, and a cylindrical body.

Cross-section
drawing

Technical drawing of a flange and its dimensions, including top and side views, displaying bolting and pipe connection details.
Dimensions
NPS

1/4“

3/8“

1/2“

3/4“

1“

1 1/2“

2“

Di 25 25 25 35 35 50 50
T (G) 14 14 16 18 20 24 27
T (NPT) 13,5 13,8 18,1 18,6 22,3 22,8 23,2
AD 120 120 120 140 140 180 180

Special sizes and other standards available upon request

Quick overview

max. 400 barg
heat resistant up to 300 °C
for liquid media
for gaseous media
Nominal sizes
1/4" - 2"
Custom made design possible
Portrait von Dirk Göttgens
Portrait von Dirk Göttgens

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Search... Your entries are invalid! Please contact us! Possible working pressure: Required thickness: Maximum temperature: This is a standard sight glass that we would be happy to manufacture for you. This is a sight glass according to DIN This is a sight glass according to DIN , which we would be happy to manufacture for you.