Sight Flow Indicators - 912-A | Noris Armaturen

NORIS Model 912-A – High-Pressure Flow Indicator with ANSI Flanges

The NORIS 912-A is a dual-sided flow indicator designed for visual inspection of liquids and gases in high-pressure lines. The 912-A version is applicable for flanged connections using ANSI standards, up to 1500 lbs, when piping specifications are not based on DIN PN.

Operating Conditions

• Operating Pressure: up to 160 bar
• Temperature with borosilicate glass: up to 280 °C
• Temperature with quartz glass: up to 500 °C
• Installation: horizontal or vertical
• Connection: ANSI flanges up to 1500 lbs
• Alternative connection series: DIN PN160, butt weld ends, female-threaded
• Construction length: depends on operating pressure and nominal diameter

Materials and Construction

The technical sheet specifies that all weldable materials can be used. Material selection should be project-specific, based on:

• fluid and corrosiveness
• design pressure and temperature
• piping material and welding process
• requirement for NACE, low temperature, or special certification, as specified by the project

Glass Selection

Borosilicate glass is suitable for applications up to 280 °C. For higher process temperatures, quartz glass allows use up to 500 °C. Selection should consider pressure, thermal shocks, line cleaning, and chemical compatibility of seals.

Applications

Suitable for chemical processes, high-pressure gases, hot liquids, high-temperature auxiliary circuits, and lines requiring local verification of filling, bubbles, or flow. It is not a flow meter and does not provide a control signal.

Options

Available with heating jacket and observation lighting. EN 10204 type 2.2 or 3.1 certificates are optional. No actuator is provided; it is a passive visual monitoring component.