Type 325 Manhole inspection sight glass | ACI Industriearmaturen GmbH

Round manhole inspection sight glass - Type 325

for openings acc. to DIN 1092-1 PN 6 | PN 10 | PN 16

Manhole tank sight glass Type 325

ACI manhole sight glasses type 325 can be used to close manhole and inspection openings on tanks, silos and vessels. In contrast to common manhole closures, the type 325 is equipped with a sight glass mount similar to DIN 28120. This allows safe observation of the processes inside the tank.

Exploded_view_type_325_with_labelling_of_the_individual_parts


Our sight glasses type 325 are made of the high-quality stainless steel 1.4571 (316Ti), which our customers have appreciated for years. The glass material used is the industry-proven borosilicate glass 3.3 in accordance or similar to DIN 7080. Should process conditions pose a problem even for the highly resistant borosilicate glass, an FEP or mica protective screen specially adapted for the fitting provides additional protection against steam and aggressive chemicals, such as alkalis, up to a pH value of 14.

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 (Teflon®), NBR, graphite (e.g. Frenzelit novaphit®) and many other branded gaskets are available for special applications.

On request and after technical verification, the manhole sight glass type 325 can be equipped with cleaning devices such as wipers SGW and spraying devices or with lights to illuminate the interior.

More technical details about our manhole sight glass type 325 can be found further down this page!

Technical data

Flange material:

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

Shape:

  • for flange connection
    acc. to DIN EN 1092-1

Temperature:

  • up to 280 °C with borosilicate glass
    according to DIN 7080 or similar
  • up to 150 °C with soda-lime glass
    according to DIN 8902 or similar

Sight glass:

  • Boroslicate glass
    according to DIN 7080 or similar
  • Soda-lime glass
    according to DIN 8902 or similar
  • Borosilcate glass untempered 

Nominal size:

  • DN 300 to DN 800

Options:

  • Wiper SGW with PTFE or silicone wiper blade
  • LED lights for EX- and Non-EX-areas
  • Spray device SVI
  • O-ring-gasket (for vacuum applications) 2
  • FEP protective screen (for higher pH-values
  • Mica protection (up to 320 °C with borosilicate glass according to DIN 7080 or similar)
  • Double glazing
  • PLEXIGLAS® / Grid impact protection
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 6 | 10 | 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_325
DN 300 350 400 450 500 600 700 800
Di [mm] 175 225 280 280 325 325 325 325
H [mm] PN 6 23 25 28 31 33 37 42 47
PN 10 29 34 38 40 44 49 57 63
PN 16 36 45 50 54 60 68 71 79
Weight [kg] PN 6 30 40 52 68 92 135 193 273
PN 10 38 58 75 92 128 187 279 394
PN 16 49 80 104 134 189 290 354 497
Da / K According to DIN EN 1092-1 PN 6 / PN 10 / PN 16


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Type 325 Manhole inspection sight glass
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