Type 394 - PN 16 - 160 with inner thread | ACI Industriearmaturen GmbH

Round sight glass fitting Type 394 - PN16 bis PN 160

with thread connection according to DIN EN ISO 228-1

Sight glass fitting Type 394

The ACI screwed sight glass type 394 is provided with an internal thread on the connection side and can be mounted directly to a corresponding external 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 seals.

Our tank sight glasses type 394 are made of the high-quality stainless steel 1.4571 (316Ti), which our customers have appreciated for years.

Exploded_view_type_394_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 394 can be optionally equipped with SGW type wipers or lights. 

More technical details about our sightglass fitting type 394 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:

  • 1/2" up to 2"

Options:

  • Wiper SGW with PTFE or silicone wiper blade
  • LED lights for EX- and Non-EX-areas
  • Vacuum applications ² on request
  • 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 - PN 160

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)

Sectional view_Type_394
PN Thread size Da [mm] Di [mm] L [mm] Weight [kg]
16 1/2" 70 15 20 0,8
1" 95 25 20 1,5
1 1/2" 110 40 20 2,2
2" 110 40 20 2,1
40 1/2" 70 15 20 0,8
1" 95 25 20 1,5
1 1/2" 110 40 20 2,2
2" 110 40 20 2,2
63 1/2" 70 15 20 0,8
1" 95 25 20 1,5
1 1/2" 110 40 20 2,2
2" 110 40 20 2,2
100 1/2" 70 15 20 0,8
1" 95 25 20 1,5
1 1/2" 110 40 20 2,2
2" 110 40 20 2,2
160 1/2" 70 15 20 0,8
1" 95 25 20 1,8
1 1/2" 110 40 20 2,7
2" 110 40 20 2,7
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Type 394 - PN 16 - 160 with inner thread
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