Longitudinal sight glass fitting type 337 PN 25

Product catalog summary

Overview: The document provides technical specifications and guidelines for longitudinal sight glass fittings, specifically type 337, used to observe liquid levels in closed containers such as boilers and tanks. These fittings are designed for welding and include a sight glass plate secured between gaskets.

Operating Conditions: The materials used include borosilicate glass (DIN 7081) and various gasket materials such as PTFE, FKM, NBR, C4400, Silicone, EPDM, and Graphite. The fittings can withstand temperatures up to 320°C and pressures up to 25 barg. The base frame materials are 1.4571 and 1.4404 stainless steel.

Installation Notes: After welding the base frame, it is crucial to check for warping of the seal surface and rework if necessary. The specified torque values for bolting must be observed, and the working pressure should be verified according to AD2000 Leaflet B9.

Glass Types: Reflective glass is recommended for clear media or dark containers, while transparent glass is suitable for illuminated containers or when medium color recognition is needed. Reflective glass cannot be protected with mica plates.

Product Code Structure: The product code provides information on the type, length, base frame, glass type, gasket, and variant. For example, the code 11-337-256-2-1-4-000 indicates a standard version with specific materials and dimensions.

Optional Accessories: Accessories include FEP protective screens for high pH values and mica discs for temperatures up to 320°C with borosilicate glass.

Quick Overview: The fittings are suitable for both liquid and gaseous media, with lengths ranging from 176 to 536 mm. Custom designs and over 50 gasket materials are available.

Catalog excerpts

Longitudinal sight glass fitting type 337 PN 25-1

Longitudinal sight glass fitting type 337 PN 25 Type337 USAGE Longitudinal sight glass fittings serve to observe the liquid level inside closed containers (boilers, tanks, silos, etc.). Sight glass fittings of type 337 are oval longitudinal sight glass fittings for welding in or onto, completed with one sight glass plate sandwiched and securely fastened between the gaskets. 10112025 - Subject to technical changes and errors!

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Longitudinal sight glass fitting type 337 PN 25-2

Longitudinal sight glass fitting type 337 PN 25For welding in or on Type PRODUCTCODE Example for Explaining the Code Composition GROUP TYPE LENGTH BASE FRAME 1) Borosilicate glass (DIN 7081) transparent glass 2) Borosilicate glass (DIN 7081) transparent glass + Mica protection pane 3) Borosilicate glass (DIN 7081) reflective glass 5) Non-tempered borosilicate glass transparent glass Unless otherwise specified, the highlighted factory standard will be delivered. EXAMPLE The product code 11-337-256-2-1-4-000 corresponds to the standard version: Base frame made of 1.4571 Cover frame made of 1.4571...

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Longitudinal sight glass fitting type 337 PN 25-3

Longitudinal sight glass fitting type 337 PN 25 QUICK OVERVIEW Custom made design possible 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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Longitudinal sight glass fitting type 337 PN 25-4

Longitudinal sight glass fitting type 337 PN 25 For welding in or on OPTIONAL ACCESSORIES FEP protective screen / coating Mica discs in longitudinal form with round ends up to 320 °C with Borosilicate glass DIN 7081 transparent Königskamp 19 · 52428 Jülich · Germany 10112025 - Subject to technical changes and errors! Powered by TCPDF (www.tcpdf.org)

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