A metallic pipe fitting with a circular flange and bolts, featuring a transparent circular window in the center.
Industrial flanged pipe fitting with a transparent viewing port.
Metal pipes and flanges arranged in a row, typically used in plumbing or industrial applications.
Video | Flow sight glass type 531 – ACI industrial valves GmbH

Flow sight glass type 531 PN 10/63

Flow sight glass with welding ends

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Flow sight glass PN 10 | PN 16 | PN 25 | PN 40 | PN 63

Certified quality
Technical data
  • 40
  • 50
  • 80
  • 100
  • 125
  • 150
  • 200
  • 250
  • 300
  • 350
  • 400
  • 10
  • 16
  • 25
  • 40
  • 63
  • 80°C
  • 130°C
  • 150°C
  • 175°C
  • 180°C
  • 200°C
  • 280°C
  • 300°C
  • 320°C
  • Wiper SGW with PTFE or silicone wiper blade
  • LED light for Ex and non-Ex areas
  • FEP or Halar® coating
  • Mica protection discs
  • Double glazing type 531D
  • Special constructions

Quick overview

max. 63 barg
heat-resistant up to 320 °C
for liquid media
for gaseous media
Nominal sizes
DN 40 - 400
Custom solutions possible
> 50 sealing materials
Accessories available

Cross-section
drawing

Technical drawing
Dimensions
DN 40 50 80 100 125 150 200 250 300 350 400
BL² 200 230 310 350 400 480 600 730 850 980 1100
D1² 35 45 55 83 107 132 160 160 160 160 160
AL² 260 260 340 380 420 470 580 650 700 750 800
C 48,3 60,3 88,9 114,3 139,7 168,3 168,3 219,1 273 355,6 406,4
WT 2,6 2,9 3,2 3,6 4 4,5 6,3 7,1 8 8,8 11
2) All dimensions are executed according to the standard - as far as constructively possible. Otherwise, the information from the order confirmation and the customer drawing applies.
Dimensions correspond to the nominal pressure stage PN 16, other pressure stages may differ

Product information

Flow sight glass for operating pressures up to 63 barg with welding ends.

The flow sight glass type 531 as a welded construction is a particularly robust version of our flow sight glasses.

Type 531 is designed for operating pressures of up to 63 barg and can be easily welded into existing pipelines. Thanks to its design, various special manufacturing lengths are easily possible.

Even with larger nominal sizes, operating pressures of up to 63 barg and more can be achieved with type 531.

The standard version with borosilicate glass is suitable for operating temperatures up to 280°C, with an additional mica protection disc even 300 °C or 320 °C in combination with MAXOS® safety sight glasses according to DIN 7080.

The sealing of the fitting is done with flat seals tailored to your needs from a wide range of materials. In addition to the widely used fiber material seals, it also offers more advanced materials such as PTFE (Teflon®), NBR, novaphit® MST-XP, KlingerSil® C4400, and many other branded seals.

Produktbild
Portrait von Wolfgang Tackenberg
Portrait von Wolfgang Tackenberg

Would you like personal advice?

Benefit from our expert knowledge in process monitoring. Our experienced team will provide you with sound advice when selecting the ideal sight glass fittings for your specific requirements. Schedule your personal consultation now!
Wolfgang Tackenberg
Technical Sales Manager
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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.