Tank Sight Glass DIN 28121 - PN10 | PN25 | ACI Industriearmaturen GmbH

Circular Tank Sight Glass Type 321 - PN10/25

According to DIN 28121 

Tank Sight Glass Type 321 PN 10/25

Our round tank sight glasses type 321 are screwed onto flanges according to DIN EN 1092-1 to allow observation or illumination of the tank interior. ACI tank sight glasses type 321 are designed according to DIN 28121 for operating pressures up to 25 bar and can easily be used as a replacement part for already existing fittings according to DIN 28121. A sight glass made of chemically highly resistant borosilicate glass DIN 7080 is clamped between two high-quality stainless steel flanges and a PTFE enclosed resilient gasket on the media side. Since this gasket is in the force shunt, the flange parts of the sight glass lie directly on top of each other and thus protect the glass plate in the best possible way.

Exploded_view_type_321_with_labelling_of_the_individual_parts

Type 321 is delivered pre-assembled from the factory and can be screwed directly onto a flange according to DIN EN 1092-1 without any additional effort. In the unlikely event that the glass is damaged during operation, the entire fitting can be replaced with little effort.

Our type 321 tank sight glasses are made of the high-quality stainless steel 1.4571 (316Ti) that our customers have appreciated for years. The glass material used is borosilicate glass 3.3 according to DIN 7080, which has proven itself in the industry. The sealing in the force shunt preempts setting of the gaskets, so that retightening of the clamping screws on site is no longer necessary. The PTFE enclosed resilient gasket makes the tank sight glass type 321 suitable for foodstuffs, acids, alkalis and the most aggressive chemicals.

If  the process conditions pose a problem even for the highly resistant borosilicate glass, an FEP or mica protective screen specially adapted for 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 321 can be optionally fitted with spray devices, SWI type wipers or lights.

More technical details about our tank sight glass type 321 according to DIN 28121 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:

  • according to DIN 28121

Temperature:

  • up to 200 °C ² with borosilicate glass
    according to DIN 7080

Sight glass:

Nominal size:

  • DN 40 up to DN 200

Options:

  • Wiper SWI with PTFE or silicone wiper blade
  • LED lights for EX- and Non-EX-areas
  • Spray device SVII
  • FEP protective screen (for higher pH-values)
  • special desgins are possible 

Gaskets:

  • PTFE enclosed resilient gasket

Nominal pressure:

  • PN 10 / 25

Screws:

  • A4-80
² Limited by gasket material

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_321
DN 40 50 80 100 125 150 200
Da [mm] According to DIN EN 1092-1
L [mm]
K [mm]
Di [mm] 48 65 80 100 125 125 150
H (PN10) [mm] 36 38 46 46 54 54 54
H (PN25) [mm] 38 41 50 59 66 66 66
Weight (PN10) [kg] 3,8 4,6 8,2 9,3 13,8 29,5 28,7
Weight (PN25) [kg]  4 5 8,9 14 20 26,9 39,3


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Tank Sight Glass DIN 28121 - PN10 | PN25
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