Continental Trade Sp. z o. o.


Type 318 BIO



Our tank sight glass fittings Type 318 BIO 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 -0.2 bar up to +0.5 bar. Two flanges of high quality stainless steel 1.4401 surround a glass disc made up chemically highly resistant borosilicate glass 3.3 according to DIN 7081, creating a nearly maintenance-free inspection port.

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

The sight glass fitting is sealed using flat gaskets specifically selected for your application from our vast range of gasket materials. Apart from commonly used aramid fibre gaskets, we can offer Type 318 BIO with sophisticated materials like PTFE, NBR, graphite composites and many other gasket types.

Like the rest of our tank sight glass fittings, Type 318 BIO is available equipped with wipers type SW1, spray nozzles or light fixtures. Read on to learn more technical details of our Type 318 BIO!



Base and Cover flanges: 

Sight glass: 
borosilicate glass to DIN 7081

PTFE (200 ºC), FKM (200 ºC), NBR (100 ºC), C4400 (150 ºC), Silicone (200 ºC), EPDM (140 ºC), Graphite (280 ºC) 


similar to DIN28120 but from -0.2 up to +0.5 bar

Nominal size: 
DN50 - DN400

Nominal pressure:
from -0.2 up to +0.5 bar

With borosilicate glass from 100° C up to max. 280 ° C
depending on gasket type

Optional versions are possible.

Dimension of Type 318 BIO

Special construction/options:
a) With wiper blades SWI or SWII
b) With spray nozzle SV1
c) Double glass
d) O-Ring seal (vacuum capable)
e) With LED lights
More 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
150 250 175 16 8.9 48
200 300 225 16 11.5 55
400                            530 450 20 26.5 52

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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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