Continental Trade Sp. z o. o.


Intermediate flange sight glass type 640 - PN16


The central element of the 640 flow sight glass  is a borosilicate 3.3 glass tube, which is clamped between two flanges made of carbon or stainless steel. This construction provides   omni-directional view (360 ° view) and natural backlighting of the process medium.

The flanges are clamped together using threaded rods. Rods also supports the flanges longitudinally to prevent excessive force on the glass tube, ensuring a long service life of the device.

For less demanding applications type 640 are available with tube made of acrylic glass. For high temperature applications, the tube can be made of quartz glass.

The type 640 can operate at pressures up to 16 bar. It is available for flanges from DN10 to DN300.

The sight glasses are without liquid traps if correctly installed.

Technical data


Acrylic glass (80°C)
Borosilicate glass  (300°C)
Quartz glass (1100°C)

Intermediate flange version.

DN10 - DN300

max. 16 bar 

with acrylic glass max. 80 ° C
with borosilicate glass max. 300 ° C
with quartz glass max. 1100° C

Optional versions are possible

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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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