Sight Flow Indicators - 111-S | Noris

NORIS Bauform 111-S – Dual-Sided Flow Indicator with Butt Weld Ends

The NORIS 111-S is a straight-through, dual-sided flow indicator with butt weld ends, designed for visual inspection of filling and flow in pipelines. Its body geometry minimizes residual liquid retention when installed horizontally, beneficial for discharge, cleaning, or product change lines.

Technical Specifications

• Connection: Butt weld ends
• Operating Pressure: 16 bar
• Operating Temperature: 150 °C or 280 °C
• Sizes: DN10/17.2 to DN80/88.9
• Construction Length: 184–266 mm, depending on DN
• Larger Dimensions: Bauform 112-S series
• Options: Flanges, indicator lighting

Materials and Sealing

The body is stainless steel WNr 1.4404. Covers are available in galvanized steel for the 111-S-VS version or stainless steel for the 111-S-VV version. Bolts are DIN 912 class 8.8 or A4-70. Observation glasses are borosilicate per DIN 7080 or soda-lime per DIN 8902. Standard sealing is graphite, with other materials available after fluid and temperature assessment.

Application Scope

Type 111-S is selected for welded pipelines where regular disassembly via flanges is not required. It is used in process water, auxiliary networks, compatible chemical fluids, and lines where local confirmation of filling, flow, bubbles, or fluid color change is needed.

Difference from NORIS 111

The main difference is the connection. The 111 is flanged, while the 111-S has welded ends. Selection depends on piping standards, disassembly needs, and cleaning requirements.

FAQ

Does it accept an actuator?
No. It is a passive flow indicator. The available electrical option is for lighting, not an actuator.

What should be specified in the order?
DN/outer pipe diameter, temperature, cover material, glass type, sealing, fluid, and lighting requirement.