Circular sight glass fitting type 321A Class 150 lbs

Product catalog summary

Overview: The document describes the specifications and usage of circular sight glass fittings, specifically type 321A, which are used to observe and illuminate the interiors of closed containers like boilers and tanks. These fittings are compatible with ANSI flanges Class 150 lbs and are designed for both liquid and gaseous media.

Specifications: The sight glass fittings are constructed with a sight glass plate inserted between seals and tightly screwed. The sealing is achieved through a flexible seal ensuring necessary compression. The fittings are similar to DIN 28121 but are designed for ANSI/ASME flange connections. They can withstand temperatures up to 200°C and pressures up to 20 barg, depending on the glass and gasket materials used.

Materials: The base flange materials include 1.4571, 1.4404, 1.4541, and 1.4306. The glass options are borosilicate glass (DIN 7080) and soda-lime glass (DIN 8902). The gaskets are PTFE encased corrugated ring gaskets, and screws are A4-70.

Installation Notes: It is recommended to use seals suitable for the sealing surfaces and screws of equivalent or higher quality than the sight glass flanges. Lubrication of screw threads and heads is advised.

Product Code Structure: The product code provides details about the type, class, NPS, base flange, glass, gasket, and variant. For example, the code 11-321A-1-4-1-1-1-0 corresponds to a standard design with specific materials and configurations.

Operating Conditions: The operating conditions are dependent on the choice of glass and gaskets. Borosilicate glass is suitable for temperatures up to 200°C, while soda-lime glass is suitable up to 150°C. Both can handle pressures up to 20 barg.

Optional Accessories: Accessories include spraying devices, round mica discs for high temperatures, sight glass wipers, LED lights for Ex and non-Ex areas, and FEP protective screens for high pH values.

Catalog excerpts

Circular sight glass fitting type 321A Class 150 lbs-1

Circular sight glass fitting type 321A Class 150 lbsfor ANSI/ASME flange mounting similar to DIN 28121 USAGE Round sight glass fittings serve to observe and illuminate the interior of closed containers (boilers, tanks, silos, etc.). Sight glasses of type 321A are round sight glass fittings that are compatible with ANSI flanges Class 150 lbs, completed with a sight glass plate inserted between the seals and tightly screwed. The sealing is done through a flexible seal, where the force shunt ensures the necessary compression. Seals suitable for the sealing surfaces should be used. The screw material should be equivalent to or of higher quality than the sight glass flanges. In principle, screws that meet the applicable standards should be used. Whenever possible, the screw thread as well as the screw head should be lubricated with screw lubrication. Similar to DIN 28121 but for Flange connection according to ANSI / ASME 10112025 - Subject to technical changes and errors!

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Circular sight glass fitting type 321A Class 150 lbs-2

Example for Explaining the Code Composition 1) Class only related to the bolt circle. Max pressure 20 barg! For higher working pressures see high-pressure variant type 322A EXAMPLE STRUCTURE The product code 11-321A-1-4-1-1-1-0 • corresponds to the standard design: # Base flange made of 1.4571 Cover flange made of 1.4571 • PTFE coated encased corrugated ring gasket Unless otherwise specified, the highlighted factory standard will be delivered. Cover flange Glass cushion Sight glass PTFE coated encased corrugated ring gasket Base flange Screws For aggressive media, FEP or Halar® coated sight glass...

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Circular sight glass fitting type 321A Class 150 lbs-3

Circular sight glass fitting type 321A Class 150 lbs for ANSI/ASME flange mounting similar to DIN 28121 fl 0 heat-resistant up to 200 for liquid media Custom made designs Accessories available OPERATING CONDITIONS Operating conditions depend on the choice of glass and gaskets: 10112025 - Subject to technical changes and errors!

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Circular sight glass fitting type 321A Class 150 lbs-4

Circular sight glass fitting type 321A Class 150 lbsfor ANSI/ASME flange mounting similar to DIN 28121 Type OPTIONAL ACCESSORIES Spraying device SV2 > For intermediate flange mounting FEP protective screen / coating > for high pH values 9 Konigskamp 19 • 52428 Julich • Germany 10112025 - Subject to technical changes and errors! > up to 320 °C with Borosilicate glass DIN 7080 > with PTFE, silicone, EPDM or FKM wipers

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