Tank Sight Glass type 230 | Noris

Type 230 Sight Glass with Weld-Neck Flanges

The Noris Type 230 is a circular sight glass with weld-neck flanged ends, designed for welded installation on tanks, vessels, and pipelines. It is intended for direct visual inspection of flow, liquid or gas presence, color, foaming, and medium clarity. Documentation specifies suitability for both liquid and gas applications, including custom process installations.

Technical Specifications

• Connection: Weld-neck flanges (EN/DIN)
• Applications: Tanks, pipelines, process vessels
• Suitable Media: Liquids and gases
• Nominal Sizes: DN 40 to DN 200
• Pressure Ratings: Available in multiple pressure classes per design
• Order Example: DN 50, borosilicate glass DIN 7080, 16 bar

Materials and Glass Options

Weld-neck ends and cover are available in WN 1.4571, WN 1.4541 stainless steel, or carbon steel. Glass options include borosilicate (DIN 7080) or soda-lime (DIN 8902). Sealing is asbestos-free by default; alternative gasket materials available per process requirements.

Dimensional Data

Viewing diameter matches DN. Standard sizes: DN 40, 50, 65, 80, 100, 125, 150, 200. Outer dimension A: 150–340 mm. Connection diameter d: 48.3–219.1 mm.

Selection Criteria

Type 230 is selected for welded sight glass installation on piping or vessels, as opposed to bolted or threaded designs. Selection should consider DN, design pressure, piping material, process medium, temperature, glass type, and gasket compatibility.

FAQ

Is this a continuous level gauge?
No. It is a visual inspection device only.

Are actuators required?
No. There are no actuated or moving parts.

When is Type 230 preferred over Type 220/225?
When inspection is required on piping or weld-neck connections, not on elongated tank shell slots.