Continental Trade Sp. z o. o.


Type 318V - PN2.5 (vacuum)



Our tank sight glass fittings Type 318V are intended for welding installation into or onto a pressure vessel wall and provide a way to observe and illuminate the interior of the vessel. ACI tank sight glass fittings of Type 318V have been designed based on DIN 28120 for an operating pressure from -1 bar up to 2.5 bar. Two flanges of high quality stainless steel surround a glass disc made up chemically highly resistant borosilicate glass 3.3 according to DIN 7080, creating a nearly maintenance-free inspection port. For less demanding applications, soda-lime glass (DIN 8902) may be used.

Contrary to the sight glass fittings described in DIN 28120, our Type 318V is significantly thinner and the hexagon head screws barely protrude out of the cover flange, thus reducing the space required for installation. Type 318V (based on Type 318) is dedicated to low pressure and vacuum application.  

An O-Ring seal makes type 318V perfectly capable of vacuum applications.

Like the rest of our tank sight glass fittings, Type 318 BIO is available equipped with wipers or light fixtures. Read on to learn more technical details of our Type 318V!



Cover flange: 1.4541
Base flange: 1.4571

borosilicate glass acc. to DIN 7080
soda lime glass acc. to DIN 8902

O-Ring acc. to requirements


Other materials on request.

similar to DIN28120 but for pressure from -1 up to +2,5 bar

Nominal sizes: 
DN50 - DN125

Nominal pressure:
from -1 up to +2,5 bar

- with borosilicate glass  - max. 280 ° C
- with soda lime glass -  max. 150 ° C
depending on material used.

Optional versions are possible.

Dimensions of Type 318V

Special construction/options:
a) wiper
b) LED or Halogen light (ATEX Certificate possible)
c) High temperature service (with quartz glass)
Other special constructions available on request

DN Da Di h1 kg Nm
50 150 80 12 3.8 37
80 175 100 14 5.2 52
100 200 125 14 6.1 63
125                           220 150 16 7.2 44

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While every attempt has been made to verify the source of the information, no responsibility is accepted for accuracy of data.

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