Special design sight glass type 338 | ACI Industriearmaturen GmbH
News Special design sight glass type 338

A sight glass fitting adapted to the inner wall of the tank...?

...yes, we also offer this kind of service and realize the project together with our customer.

A renowned tank builder approached us with an interesting request. A longitudinal sight glass fitting was to be adapted to the inner wall of the container. These adaptations are often made in the pharmaceutical and food industries. This is to prevent dead spaces as far as possible, as otherwise a breeding ground for germs and deposits can form in the production process. After completion of all welding work, the interior of the container should be reworked by the customer and the surface polished.

We have already made such fittings several times. The interesting innovation for us was that not only a simple radius is attached to the base frame.

Rather, the container is round and cone-shaped, and the resulting geometry on the base frame produced a frustoconical contour. This complex 3-D geometries can only be generated for machining with a so-called CAM system.

In total, we were allowed to adapt our Type 338 for three different containers, with the back radius and taper angle being different for all three designs.

Drei rückseitig konisch bearbeitete Längsschaugläser Typ 338 in Rückansicht

For the base and top frame, our customer chose the high-quality stainless steel 1.4571 (F316Ti). Since the material thickness influences the type of inspection certificate according to EN 10204, we had to have the raw material of the base frame restamped by an independent body for this design. The raw materials used could thus be certified with an acceptance test certificate according to EN 10204 - 3.2. We were also able to pass on to our customer the corresponding material approvals according to AD2000 leaflet W2/W10.

Einzelnes Längsschaugas mit konischer Bearbeitung der Rückseite in Rückansicht

To guarantee operating pressures of up to 16 bar(g), we have used a borosilicate glass. This was manufactured in a transparent version in accordance with the existing DIN 7081.
For our customer, PTFE came into question as the wetted seal material, which had to be FDA-compliant according to 21 §177.2600.

If you would like us to assist you with your individual projects, please do not hesitate to contact us.

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ACI Industriearmaturen GmbH - 
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