Type 392 with external thread connection | ACI Industriearmaturen GmbH

Circular Sight Glass Type 392 - PN16-PN40 with male thread connection

Sight Glass Fitting Type 392

The ACI screw-in sightglass type 392 is a further development of our welding socket sight glass type 390. The sightglass type 392 is equipped with an external threaded connection and can therefore be mounted directly to a corresponding internal thread with little effort.

As with our other sightglasses, a sightglass made of chemically highly resistant borosilicate glass to DIN 7080 or similar is clamped between two high-quality stainless steel flanges and proven quality gaskets.

Our type 392 sight glasses are made of the high-quality stainless steel 1.4571 (316Ti) that our customers have appreciated for years.

Exploded_view_type_392_with_labelling_of_the_individual_parts

The fitting is sealed with flat gaskets adapted to your requirements from an extensive range of materials. In addition to the widely used fiber gaskets (e.g. KLINGERSIL® C-4400), PTFE (Garlock GYLON®, Frenzelit novaflon®), NBR, graphite (e.g. Frenzelit novaphit®) and many other branded gaskets are available for special applications.

You can find more information about gasket materials in our Help Center.

If the maximum operating temperature of 280°C does not meet your requirements, or if process conditions pose a problem even for the highly resistant borosilicate glass, an FEP or mica protection screen specially adapted to the fitting offers additional protection against steam and aggressive chemicals, such as alkalis up to a pH value of 14. 

As with other of our sightglass fittings, our Type 390 can be optionally equipped with SGW type wipers or lights. 

More technical details about our sightglass fitting type 390 can be found further down this page!

Technical details

Flange material:

  • Base flange:
    1.4571 (factory standard)
  • Cover flange:
    1.4571 (factory standard)
  • Other materials on request ¹

Shape:

  • with threaded connection according
    to DIN EN ISO 228-1

Temperature:

  • up to 280 °C with borosilicate glass
    according or similar to DIN 7080

Sight glass:

  • Borosilicate glass DIN 7080 or similar

Nominal size:

  • DN 25 up to DN 100

Options:

  • Wiper SGW with PTFE or silicone wiper blade
  • LED lights for EX- and Non-EX-areas
  • PLEXIGLAS® - impact protection
  • Stainless-steel perforated plate - impact protection
  • FEP protective screen (for higher pH-values)
  • special desgins are possible
² depending on environmental variables

Gaskets:

  • Fiber; (KLINGERSIL ® C-4400)
  • PTFE, FKM, NBR, Silicone, EPDM
  • Graphite; (Frenzelit novaphit®)
  • or according to customer requirements

Nominal pressure:

  • PN 16 

Screws:

  • A4-70

¹ Optional materials:

1.0460 / 1.4301 / 1.4307 (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)

Section_view_type_392
DN 25 40 50 65 80 100
Da [mm] 115 150 165 185 200 220
Di [mm] 28 43 54 70 83 107
G G 1" G 1/2" G 2" G 2 1/2" G 3" G 4"
L [mm] 20 25 25 25 25 25
H [mm] 115 127 129 132 139 146
Gew. [kg] 2,7 4,7 5,6 6,9 8,7 10,3
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Type 392 with external thread connection
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