Type 335 - PN3 | Tank sight glass | ACI Industriearmaturen GmbH

Oval Tank Sight Glass Type 335 - PN 3

Longitudinal sight glass for level indication

Oval Longitudinal Sight Glass Type 335 - PN 3

The ACI tank sight glass Type 335 is a lightweight design that offers a significantly enlarged viewing aperture compared to our Type 330 at rather low operating pressure up to max. 3 bar(g). Due to this design, the Type 334 combines the functions of our round tank sight glasses such as the Type 318 and our level indicators for vessel wall mounting Type 330.

Despite the lower requirements, our Type 335 vessel sight glasses are also made of the high-quality 1.4571 (316Ti) stainless steel that our customers have appreciated for years.

Exploded_view_type_335_with_labelling_of_the_individual_parts

The glass material used is the industry-proven borosilicate glass 3.3 similar to DIN 7081.

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.

The tank sight glass type 335 is delivered pre-assembled by hand at the factory. The pre-assembled unit must be dismantled before the base frame is welded in or on. The glass and the gaskets are then screwed together again with the cover frame, whereby even very low tightening torques are sufficient to achieve sufficient surface pressure.

Detailed technical information about our tank sight glass type 335 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

Design:

  • Oval Lightweight design with 50 mm vision panel

Temperature:

  • up to 280 °C with borosilicate glass
    similar to DIN 7081

Sight glass:

  • Boroslicate glass similar to DIN 7081

Nominal length:

  • 270 mm to 760 mm

Options:

  • High temperatur version
  • Nearly cavity-free desig

Gaskets:

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

Nominal pressure:

  • PN 3 

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)

Sketch_with_section_view_type_335
BL [mm] 270 340 410 480 550 620 690 760
SL [mm] 200 270 340 410 480 550 620 690
Weight  [mm] 6,3 7,9 9,5 11,1 12,7 14,2 15,8 17,4
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Type 335 - PN3 | Tank sight glass
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