Type 337 - PN 25 | Oval Tank sight glass | ACI Industriearmaturen GmbH

Oval Tank Sight Glass Type 337 - PN 25

Longitudinal sight glass for level indication

Longitudinal Sight Glass Type 337 PN 25

The ACI rectangular level indicator Type 337 is an easy to mount fitting for the industrially proven borosilicate sight glass plates according to DIN 7081 or similar.

The industry norm DIN 7081 includes the use of sight glasses of different lengths in the “Transparent” and “Reflex” versions. Transparent glass means simple, smooth glass plates. This type can, should the operating conditions require it, be fitted with protective layers made of mica or other materials such as KEL-F. We recommend the reflex type, if operating conditions allow it, for use with clear, colourless liquids. Due to the grooves contained in this type, the liquid stage appears more clearly than in the transparent version.

Exploded_view_type_337_with_labelling_of_the_individual_parts

Our tank sight glasses type 337 are made of the high-quality stainless steel 1.4571 (316Ti), which our customers have appreciated for years. Like most of our fittings, the Type 337 is available in a variety of materials on request.

The sealing of the fitting is done with flat gaskets adapted to your needs from an extensive range of materials, which, in addition to the widely used fibre gaskets, also offers more sophisticated materials such as PTFE (Teflon®), NBR, graphite and many branded gaskets. You finde mor information about gasket materials in our Help Center.

Detailed technical information about our tank sight glass type 337 is available further down this page.

Technical details

Frame material:

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

Shape:

  • Oval longitudinal sight glass

Temperature:

  • up to 243 °C with borosilicate glass Reflex and Transparent
    according to DIN 7081 or similar
    (with saturated steam or hot water pressure
  • up to 280 °C with borosilcate glass Reflex and Transparent
    according to DIN 7081 or similar
    (without technically significant glass attack)
  • up to 320 °C with borosilcate glass Transparent 
    according to DIN 7081 or similar
    (with mica protection)

Sight glass:

  • Boroslicate glass acc. to DIN 7081 
    or similar
  • Borosilcate glass untempered 

Nominal length:

  • 176 mm to 536 mm

Options:

  • High temperature design on request
  • Vaccum design on request
  • Special designs are possible 

Gaskets:

  • KlingerSil® C4400
  • PTFE, FKM, NBR, Silikon, EPDM
  • Graphit 
  • or according to customer requirements

Nominal pressure:

  • PN 25

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_337
BL [mm] 176 226 256 316 376 436 496 536
SL [mm] 124 174 204 264 324 384 444 484
Weight  [kg] 3,3 4,3 4,9 6,0 7,1 8,3 9,4 10,2


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Type 337 - PN 25 | Oval Tank sight glass
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